HOME


Misc. United States of America


KEEP ISRM FREE!
This gallery is dedicated to slide rules and manufacturers located within the U.S.A. that do not have their own gallery. You will note that many United States Companies OEM'd some of their slide rule models from other countries. This is not a practice employed by the other countries themselves (i.e. buying from the USA and put their name on them). It was probably less from national pride as it was a method of the United States in helping to rebuild European and Japanese economies after WWII and in some cases, like Post and Dietzgen, to renew their relationships as it was before the war.
Manufacturers/Brands Represented in this gallery:
AVOL Mfg. Co., Bellamy, Beta Enterprises, Bill-Mar, Brown, Charles Bruning, Climatemaker, C-Thru, Davis Instruments, Dieterich-Post, Digi-Craft, Disney, Easterly, Empire Educational Instruments Inc, EngineeringSales, Favor-Ruhl, Felsenthal, Foxboro, Fullerton, Gemini Engineering Gerber, Gisholt, Globemaster, Graphic Calculator, Grizzle, B.F., Guedon, Henschel, Indeco, GUCO, Kel-Co, Keyline, Kudlaty, Lakeside, Lietz, Master, Mead, Neal Feay, Nobema, D.Van Nostrand, Novotni, Science Services, Small, Spirule, Paisley, Parisian Novelty, Pedigree, Perrygraf SR, Plus & Minus, Precision Scale Co, Prestige, SR and SE CO, T and T Electric Mfg., Tomlinson, Tru-Bilt, USBlue, Weber, and various promo slide rules at bottom of gallery.

More United States manufactured slide rules may be found in the Circular, Acu-Math, Charvoz-Roos, Dietzgen, Lawrence, K&E, Post, Pickett, Richardson, and Sterling galleries. Slide rules branded for USA companies by Relay/Ricoh may be found in that gallery, along with related USA made slide rules under their brands, Like ALVIN, Compass, Lafayette, Skyline, etc.

AVOL Mfg. Co., Portland, Oregon

Note: The ISRM Curator speculates that this computational device may have been designed in 1958 by a Univ. of Wash. grad student or professor with the last name of "Avol", as the only record of its use was taught by the University, as late as 1992, and was used within the state of Washington by the donor mentioned below. Although the rule is marked patent pending, there is no record of one being issued.


Avol-Rule for Earthworks Computation
ISRM 14.04.31.01

Mahagony Clam Shell box.
Avol-Rule Instructions (3.21MB PDF) Road Engineering Course FPE 342 Winter 1992, University Of Washington, References the Avol-Rule in its text.
Avol-Rule for Earthworks Computation
Made in USA - By AVOL Mfg. Co., Portland, Oregon ©1958. Patent Pending Copyright entry: A484354 17SEP1958
Note: The Instructions show that this was sold by Tomar Instrument Co., 7511 N.W. 5th Ave, Vancouver, WA.
Front Scale : 10-3/8 in // Area, Volume (0-1000), Volume (1000-2000), Acres (0-25), Acres(25-49.5)
Back : Map Scale Factors
Used for earthwork calculations in road engineering to determine the volume of fill or in a cutaway.
Donated by Ruth Hazen, for her husband Philip Hazen, of Washington, D.C.
Philip Hazen purchased this in the 1960's when he was doing bridge work for the US Department of Transportation in Vancouver, WA Philip Hazen grew up in Northwestern Pennsylvania and graduated from Fort LeBeuf Academy in Waterford, PA in June, 1954. Four years later, he graduated from Penn State University with a Civil Engineering degree, and enlisted in the Navy. Following his tour with the Seabees, he was accepted into a three year training program with the Bureau of Public Roads (BPR) in Washington, DC. BPR sent him Mt. Rainier, WA in the summer of 1962, to Vancouver, WA in 1963, and to Wisconsin and Texas in 1964. In Vancouver in April, 1963, Mr. Hazen was assigned the task of preparing to cut and fill a roadbed. He used the Avol-Rule to calculate area and volume, so that the material cut from a hill would just match the area to be filled. He remembers this as a desk job done in preparation for surveying, as it was too early to get out in the field. Following his training period with BPR, he spent his career in the Bureau of Public Roads in Washington, DC, later renamed the Federal Highway Administration, retiring in 1994. Now retired, Philip devotes his time to travel, renovating old houses and to community service.

John C. Bellamy


Bellamy Temperature And Pressure Gradiant Scale
ISRM 20.10.01.04		 Bellamy Temperature And Pressure Gradiant Scale
Made in USA - By Johnn C. Bellamy (1943) Institute of Meteorology University of Chicago
Front: Horizontal Temperature and Pressure Gradient Scale
Back: Instructions and Graph of C2/R

Beta Enterprises



Beta Enterprises ABA-TEN Rule
ISRM 13.00.00.66		 Beta Enterprises ABA-TEN Rule
Made in USA - By Beta Enterprises, Salinas, CA (1971)
Front Scale : 12 in // [ a ] [ b ] \\ 30cm
Back Scale : C1 [ D ] C2
Used for addition/subtraction, as well as multiplication/division
Instructions 1.48MB

Bill-Mar Speciality Co., Ohio

A widely diversified company that produced specialty slide rules. The only two styles that are known are concrete volume calculators, but as there are models #24 (made in Japan) and #89 (made in Hong Kong), shown in the gallery, there must be other varieties as well.


Bill-Mar Sp. Co. Concrete Calculator No.24
ISRM 13.05.19.01		 Bill-Mar Sp. Co. Concrete Calculator No.24
Made in Japan for Bill-Mar Speciality Co., Ohio (c1970)
Front Scale : A (Thickness) [ B (Width or Height), C (Length)] D (Cubic Yards), Dia Inches
Back : Instructions.
Back Advertising: El Paso Sand Products, Inc. (Colorado)
Donated by Jeremiah Whitney, Louisville, Colorado
Jeremiah Wadsworth Whitney (1941- ) used this slide rule in his career as an Architect.He graduated with a B.Arch degree from Yale University in 1963, and as part of the Officer Candidate School, he spent the next 5 years (1963-1968) as a commissioned officer, in the U.S. Naval Reserves, achieving the rank of Lieutenant, He received his MS.Architecture from Yale in 1971, then relocated to Colorado and specialized in residential design for developers. Photo taken by ISRM in 2013.


Bill-Mar Sp. Co. Concrete Calculator No.89
REF		 Bill-Mar Sp. Co. Concrete Calculator No.89
Made in Hong Kong for Bill-Mar Speciality Co., Ohio (c1990)
Note: Similar in construction to low cost folded thin sheet slide rules made by C-Thru
Front Scale : A (Thickness) [ B (Width or Height), C (Length)] D (Cubic Yards), Dia Inches
Back : Instructions.
Back Advertising: SOUSA READY MIX, Mt. Shasta, California
Archive - Scan by Prof. Christian M. Hamann Collection, Germany

Arthur Brown & Bro



P210 Arthur Brown & Bro 7993A		 Arthur Brown & Bro 7993A
Made in USA (looks like by Bruning)
Front Scale : 12.5cm // A [ B, CI, C ] D, K \\ 5in
Back Scale : S, L, T
Back: Blank


ISRM Arthur Brown & Bro 7996A		 Arthur Brown & Bro 7996A
Made in USA (by Roos)
Material: Wood stock with plastic laminate 
Front Scale (Scale similar to Post 1457)
T Cot, DF [ B, K, L, C ] D, S Cos, ST
Back Scale
Fraction-Decimal [ CF, CIF, CI, C ] Trig identities


Charles Bruning Company

Bruning did not make their own slide rules but bought rebranded slide rules from Grafton Plastics, a privatee enterprise owned by Millie Ludwig and her husband, located in Grafton Illinos. Grafton Plastics rebranded the same slide rules for Post, Dietzgen, and Compass. Bruning would also contract toi get promotional advertising the the small slide rules for clients. The company's history begins in lower Manhattan where Charles Bruning started the company in 1897 making blueprints. Only a year later, the company moved to Van Buren and Dearborn in Chicago. Fittingly, they moved around among in several locations in the Printer's Row area, finally settling at 445 Plymouth Court. Branches of the company were opened throughout the country. The company diversified into manufacturing drafting supplies and copy machinery for small to mid-size printing operations. Later, most of its profits would be made manufacturing the paper for these machines. The company is currently owned by Bosch.
Bruning had offices in New York, New York; Newark, New Jersey; Boston, Massachusetts; Pittsburgh, Pennsylvania; Detroit, Michigan; Chicago, Illinois; Milwaukee, Wisconsin; St Louis, Missouri; Kansas City, Missouri; Houston, Texas; Los Angeles, California; San Francisco, California; Seattle, Washington; and Birmingham, Alabama.

The Pickett catalog on the left shows that Picketts were distributed by Bruning in the 1950's. The entire catalog is available in the ISRM Library.



Charles Bruning Cat.No. 2398 Pocket Duplex
REF		 Charles Bruning Cat.No. 2398 Pocket Duplex
Made in USA by Charles Bruning
Front Scale: K, A [ B, ST, S ] D, T
Back Scale: DF [ CF, CI, C ] D, L
Archive - Image and manual (4.35MB PDF) courtesy of Greg Scott's Slide Rules


Charles Bruning 2401
ISRM 12.02.12.01		 Charles Bruning 2401
Made in USA - Westinghouse Electric Promo
Note Frederick Post 1444P Cursor variation
Front Scale
12.5cm // A [ B, CI, C ] D, K \\ 5in
Back Scale: [S, L, T ]
Back Blank


Note: Body same as Post 1444-P


Charles Bruning 2401 Early Cursor
ISRM 14.07.02.86		 Charles Bruning 2401 Early Cursor
Made in USA
Front Scale
12.5cm // A [ B, CI, C ] D, K \\ 5in
Back Scale: [S, L, T ]
Back Adv/sleeve: Blank


Charles Bruning 2401
ISRM 13.07.03.06		 Charles Bruning 2401 Simplex
Made in USA
Note alternate cusor design
Front Scale
12.5cm // A [ B, CI, C ] D, K \\ 5in
Back Scale: [S, L, T ]
Original Owner: Morris H. Friedman (etched on stock)
Donated by Daniel Swerdlow, Bethesda, Maryland

Charles Bruning 2401 (Newer Cursor)
Texas Instruments
ISRM 14.07.02.07		 Charles Bruning 2401 (Newer Cursor) Texas Instruments
Made in USA - Advertising use - Body same as Post 1444P
Front Scale
12.5cm // A [ B, CI, C ] D, K \\ 5in
Back Scale: [S, L, T ]
Back Adv: Texas Instruments, Semiconductor Components Division.
Gift Of Ed Millis, Dallas, Texas. Ed worked at TI in this division which developed the electronic calculator.


Charles Bruning 68-540 (old 2401)
ISRM 12.03.16.03		 Charles Bruning 68-540 (old 2401)
Made in USA - Note updated cursor design
Front Scale
12.5cm // A [ B, CI, C ] D, K \\ 5in
Back Scale: [S, L, T ]
Back Adv:Power Specialty Company, Houston, Texas
Retail Box
Instructions (3.7MB pdf) Copyright 1944


Charles Bruning No. 2406
REF		 Charles Bruning 2406 - Simplex
Made in Germany and rebranded for Charles Bruning Co.
Front Scale
4in // A [ B, C ] D
Back Scale: [S, L, T ]
Back: Model number.
Archive - Ebay listing photo


Charles Bruning 2420 10" Polyphase Mannheim
ISRM 13.08.27.02		 Charles Bruning 2420 10" Polyphase Mannheim
Made in USA
Front Scale: 10inch // A [ B, CI, C ] D, K \\ 25cm
Back Scale: [S, L, T ]
Back: Conversion Table
Gift of Arthur Anderson, Boulder, Colorado
Art used his first slide rule, a K&E 4081-3, which is in the ISRM K&E gallery, as a freshman at Rensselaer Polytechnic Institute in Troy, New York in 1952. RPI is the United State's oldest technological university.
Radio Shack Ad. Features Charles Bruning 10inch Mannheim Slide Rule. $3.99 Radio-News, September 1955


Charles Bruning 2460 Student Slide Rule
ISRM 11.08.28.01		 Charles Bruning 2460 Student Slide Rule
Made in USA - circa 1945
Front Scale: A [ B, CI, C ] D, K
Back Scale: [S, L, T ]
Back: Conversion Table
Original Owners: Wesley Greavu - class #149, Ziegenbalg - Class #164


Bruning 2472 (Gilson Midget)
ISRM 17.06.14.03
 Bruning 2472 (Gilson Midget)- 10.2cm dia
Made in USA for Bruning by Gilson Slide Rule Co., Stuart, Florida
Note: Copyright 1931 & 1936
Front Scales: C, CI, A, K, Log, LL1, LL2, LL3, LL4,
Back Scales: Binary, Fraction, Drill, Thread, Millimeter
Gift Of Bruce HildenBrand
8MB PDF


Bruning 68-471 (Gilson Binary) 21.1cm dia
ISRM 17.06.14.01		 Bruning 68-471 (Gilson Binary) 21.1cm dia.
Made in USA by Gilson for Bruning. Copyrighted 1940.
Front Scales
C, CI, A, K, Log, LL1, LL2, LL3, LL4, Binary, Fraction, Drill, Thread, Millimeter
Back Scales
Degrees, S, T, Degrees, S, T, Degrees, S, T, Fractions
Gift Of Bruce Hildenbrand
Manual 8Mb

Climatemaker Slide Rule Co., Box904, Bloomington, Illinos

also Climatemaker Heat Loss Calculator Co.


Climatemaker Slide Rule Service 10-B
21.02.10.01		 Climatemaker Slide Rule Service 10-B
Made in USA by Lawrence for Climatemaker, Bloomington, Illinois.
White painted wood body with Blue text. Magnifying Cursor.
Front Scale
A [ B, CI, C ] D, K
Back Slider
[ S, L, T ] Back: Conversion Chart


Climatemaker Heat Loss Calculating Rule
REF S553
Instructions 10.9MB Worksheet 5.4MB 		Climatemaker Heat Loss Calculating Rule - 1938
Made in USA by Climatemaker Corp.,
1804 WestEnd Ave, Nashville, Tennessee

Front Scale
Forced Air |stack size, Pipe Size, Pipe Area, CFM, BTU|
[ Losses 6-21, Wind, Temp Diff, single glass, Storm Windows ]
CFM No 2, Sq Ft Hot Water Rad, Sq Ft Steam Rad.
Back scale:
Gravity |3rd floor(Stack, Pipe size, Pipe Area|,
Gravity |2rd floor(Stack, Pipe size, Pipe Area|,
Gravity |1st floor(Pipe size, Pipe Area|,
[ Losses 22-40, Temp Diff, single glass, Storm Windows ]
Gravity |1st floor(Pipe Area, Pipe size|,
Gravity |2rd floor(Pipe Area, Pipe size, Stack|),
Gravity |3rd floor|Pipe Area, Pipe size,Stack|
Archive - no longer in collection

C-Thru Ruler Company

The C-Thru Ruler Company was founded in 1939 in Bloomfield, Connecticut and specialized in transparent plastic rulers and templates. They designed a line of inexpensive (value-priced) folded sheet (film) printed plastic slide rules. Their market continues in the modern era and have products in stores like Hobby Lobby and Michaels. Generic linear slide rules made by the Parisan Novelty Co.and Graphic Calculator Co, are very similar to the C-Thru designs and constructions, and I suspect they are all licensed (or the patent expired) off the Parisan Novelty Co. Patent US02,073,421 of 1937 by inventor/owner Joseph Komorous of Chicago.



C-Thru No. 27 Pocket
ISRM 12.02.19.01
Retail Card Example
Dennison No. 58076
Instructions 670Kb
 C-Thru No. 27 (Sheet Plastic Slide Rule)
Made in USA - C-Thru Ruler, Bloomfield, Connecticut
Front Scale : A [ 5in, B, CI, C, 12.5cm ] D
Back Scale : S, L, T
Well: Units Equivalants
Back Slide: Decimal Equivalents
Donated by Nancy Day, Kansas City, Missouri
William Bruce Day was given his first slide rule when he was in high school while his father, William M. Day, was stationed at Vandenburg AFB. Bruce later became a career military officer who flew B-52 missions in Vietnam and later C130s as a member of the reserves, retiring as a Lt. Col. Bruce obtained this slide rule after retiring from the Military. His civilian life was spent as a Patent and Trademark Attorny in Kansas City, where he still resides.


Agitair No. 27 Pocket
ISRM 13.07.03.08

1 page Instructions 2.33MB PDF
 Agitair No. 27 Pocket (rebranded C-Thru)
Made in USA - C-Thru Ruler, Hartford, Connecticut
Front Scale : A [ 5in, B, CI, C, 12.5cm ] D
Back Scale : S, L, T
Well: Units Equivalants
Back Slide: Decimal Equivalents
Donated by Daniel Swerdlow, Bethesda, Maryland


C-Thru No.88
ISRM 20.08.15.08		 C-Thru No.88 (Sheet Plastic Slide Rule)
Made in USA - C-Thru Ruler, Bloomfield, Connecticut
Front Scale : A [ 10in, B, CI, C, 25cm ] D, K
Back Scale : S, L, T
Well: Units Equivalants
Back Slide: Decimal Equivalents
Sleeve Markings Science Department - BHS (Boulder High School).
Gifted by Robert Carlisle of Nederland, Colorado
Instructions 670Kb


C-Thru S-888 Basic Duplex
ISRM 17.08.24.03		 C-Thru S-888 Basic Duplex
Made in Japan for C-Thru Ruler, Hartford, Connecticut
Front Scale
S, K, A [ B, CI, C ] D, L, T
Back: Blank
Clear plastic sleeve
Gift Of Nancy Morris for the husband Dustin E. Morris Collection_


REF C-Thru S-889		 C-Thru S-889
Made in Japan for C-Thru Ruler, Hartford, Connecticut
Front Scale
LL01, K, A [ B, T, ST, S ] D, L, LL1
Back Scale
LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2
Archive - Rod Lovett Collection


S370 C-Thru S-890		 C-Thru S-890
Made in Japan for C-Thru Ruler, Hartford, Connecticut
Front Scale
LL01, K, A [ B, T, ST, S ] D, LL3, LL2
Back Scale
LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2


C-Thru S-94 Slide Rule 4-1/2in dia
ISRM 14.07.02.05		 C-Thru S-94 Slide Rule 4-1/2in dia
Made in USA - C-Thru Ruler Company, Hartford, Conn.
Front Scale: K, D, ( C, B, A, CI, L)
Back Scale: S, L, T
Back: Instructions
Gift of Ed Millis, Dallas, Texas


C-Thru S-96 Slide Rule 6in dia
ISRM 21.08.07.32		 C-Thru S-96 Slide Rule 6in dia
Made in USA - C-Thru Ruler Company, Hartford, Conn.
Front Scale: K, D, ( C, B, A, CI, L)
Back Scale: S, L, T
Back: Instructions
Gift Of William Lisowski


C-Thru S-96 Slide Rule 6in dia
ISRM 04.09.27.01.D1		 C-Thru S-96 Slide Rule 6in dia
Made in USA - C-Thru Ruler Company, Hartford, Conn.
Front Scale: K, D, ( C, B, A, CI, L)
Back Scale: S, L, T
Back: Instructions
Note:Modified cursor (See original above).


C-Thru PS-69 Proportional Scale 5in dia
ISRM 14.07.22.09		 C-Thru PS-69 Proportional Scale 5in dia
Made in USA - C-Thru Ruler Company, Hartford, Conn.
Front Scale: Reproduction Size ( Size of Original, L) Percentage of Original Size, Number of Times of Reduction.
Back: Blank
Gift of Phillip Rodley, Upper Hutt, New Zealand.

Davis Instruments, CO. Hayward, California



Davis Instruments T-S-D Computer
ISRM 14.07.02.96		 Davis Instruments T-S-D Computer
Made in USA by Davis Instruments Corp., Hayward, CA.
6in Diameter Palstic
Front Scale (C&D scale): DISTANCE: Nautical or Statute Miles, KM or Yards (TIME: Minutes, Hours) SPEED
Back: Instructions
Gift Of Ed G. Millis, Dallas, Texas.
Ed Millis was at TI while the electronic 'slide rule' calculator was developed and is good friends with Jerry Merryman, the designer of the first calculator in 1967. Ed has also written a book on hobbies Hither, Thither and Yawn. Ed is a generous donor of over a hundred slide rules, calculators and ephemera to ISRM.

Dieterich-Post Co. (DIEPO)

Formed in 1917 by James W. Dieterich (abt 1889 - died?) and Rudolph Post.
Historical background notes: In 1911, James W. Dieterich, had worked his way up to blueprint foreman at B.L. Makepeace Co., then went west to land a job as a salesman with the K&E branch in San Francisco. Jacob and Charles Bruning, in Chicago, bought out W. B. Huey's interest in American Blueprint Co. in 1914. After the America Blueprint Co. buyout, W.B. Huey and A.W. Huey acquire the coating rights to Bruning products and start the Huey Company in 1915. By 1917, Rudolph Post, nephew of Charles Bruning, recruited Jim Dieterich from K&E and obtained financing for a blueprint operation from his uncle. Later in the year, the two buy out Bruning's interest and form Dieterich-Post Company. Slide rules were a monor part of the office supply business and DIEPO OEM'd from other companies like Pickett & Eckel, Inc in Chicago, Charles Bruning in California and Albert Nestler in Germany. On Wednesday, October 22, 1947, a U.S. federal trademark registration was filed for DIEPO by Dieterich-Post Company, San Francisco. The USPTO has given the DIEPO trademark serial number of 71538617. The federal status of this trademark filing expired 11/3/1992.
The Dieterich-Post Company was still operating in Monterey Park, California in 2010. The Dieterich-Post website, at the time, stated that 2010 is its 93rd year of doing business. DIEPO continued a relationship with Charles Bruning Co. (C.B.Co.) evidenced by a 1950's rebranded slide rule made by C.B.Co. By 2011 Dieterich-Post Co. was acquired by American Reprographics Co and all historical information about Dieterich-Post had been deleted from its website.

ISRM used the Wayback Machine to find historical background from the image of the 1998 www.dieterich-post.com website
The founders of our Company, James Dieterich, Sr. and Rudolf Post, began operations in 1917, with a slogan that we still believe in and maintain today, "Builders of Goodwill."
With that slogan, Mr. Dieterich and Mr. Post launched what has become the finest distributor of drafting and engineering supplies in all the United States. We hope you too will realize the contribution we make to all facets of the drafting, engineering, architectural, reprographics, desktop publishing, and large format printing industries.
Mr. Dieterich, Sr. was born in South Portland, Maine, reared in Boston, and began his career at the age 14 as an errand boy in the blueprint shop run by Bertrand L. Makepeace. It was there that he met Nellie E. Wilson (abt 1918-?), the bookkeeper, who later became Mrs. Dieterich. From the 1940 census, they had two sons James W. Dieterich (b1918) and Robert E. Dieterich (b1922) and lived in Contra Costa, California .
In her memoirs, Nell recalls that, prior to their meeting, Jim's principal ambition in those early boston days was to become a billiards champion(in the footsteps of Willie Hoppe). Thus, to polish his craft and to achieve this goal, he spent most of his evenings in a local pool hall. Obviously, she changed that!
Jim came West in 1910, stopping first to visit with a cousin in Clancy, Montana. Moving on to San Francisco, he became a traveling salesman, then assistant manager for Keuffel & Esser. After a number of years at K & E, he went to work for Victor Post and his brother, Rudolph, who ran the San Francisco branch of the Chicago-based Frederick Post Company. In 1917 Rudolph and Jim bought out Victor's share of the firm, and the Dieterich-Post Company was formed.



Dieterich-Post Mannheim (Alfred Nestler 2012)
ISRM 13.10.07.09		 Dieterich-Post Mannheim (Alfred Nestler 2012)
Made in Germany by Alfred Nestler for Dieterich-Post Co. Los Angeles - San Fransisco - Oakland
Note: Rebranding inside well.
Front Scale: A [ B, C ] D
Back scale: [ S, L, T ]
Note: Thin film plastic cursor. See the Nestler 2012 which has a metal framed cursor.


Pickett & Eckel 1010 Duplex c1948
ISRM 14.01.10.42

Box with Dieterich-Post Co. distributor label. 		Pickett 1010 Duplex sn2C40913
Serial Number 2C40913 stamped on cursor block.
Made in USA by Pickett & A.F. Eckel, Inc. for Dieterich-Post Co. (no rebranding)
Front Scale (Artwork #74)
K, A [ B, ST, T Cot, S Cos, C ] D, DI
Back Scale (Artwork #271)
DF [ CF, CIF, CI, C ] D, L
Note features: Metal Bar Cursor, Rounded Braces, Triangle Logo
Gift of Bill Wehrend collection, Palo Alto, California.

Model 1000 Slide Rule Manual with CI and DI scale supplement. (5.80MB PDF)


Dieterich-Post 3060P
REF		 Dieterich-Post 3060P
Made in USA for Dieterich-Post - This looks like a Charles Bruning Model
Front Scale
10in // A [ B, CI, C ] D, K \\ 25cm
Back scale: TBD

Archive image
1960 Dieterich-Post Catalog


REF Dieterich-Post 3072		 Dieterich-Post 3072
Made in USA for Dieterich-Post
Front Scale
K, DF [ CF, CIF, CI, C ] D, L
Back scale: TBD
LL0, A [ B, S, T, C ] LL3, LL2, LL1
Archive - Found on eBay

Digi-Craft TM



Digi-Craft Digital Thermometer Metric Converter Deskset
ISRM 13.00.00.54		 Digi-Craft Digital Thermometer Metric Converter Deskset
Made in USA.
Front Scale
12in, °F, °C, C [ Length, Area, Weight, Volume Conversion ] D, 30cm
Back Promo: XI SSO (or OSS IX)
Ambient Temperature glows through the plastic. No batteries. This must have been a promotional item.

Disney



Disney Mickey Mouse Slide Rule
S269 		 

Though not  logarithmic based, these Disney slide rules may have kick started many engineering and scientific careers.

Disney Mickey Mouse Slide Rule
Made in Hong Kong for Walt Disney Co.
Front Scale
Multiplication and Division
Back scale:
Addition and Subtraction


Disney Mickey Mouse Disneyland
S350 		Disney Mickey Mouse Disneyland
Made in Hong Kong for Walt Disney Co.
Front Scale
Addition and Subtraction, Fahrenheit to Celsius Conversion
Back scale:
Multiplication and Division, Inch to Centimeter conversion
Misc. Conversion Table


Disney Mickey Math Slide Rule
S269 		Disney Mickey Math Slide Rule
Made in USA for Walt Disney Co.
Front Scale
Addition and Subtraction, Fahrenheit to Celsius Conversion
Back scale:
Multiplication and Division, Inch to Centimeter conversion
Misc. Conversion Table


Snoopy Slide Rule
S534 		Snoopy Slide Rule
Made in USA for United Feature Syndicate.
Front Scale
Addition and Subtraction, Fahrenheit to Celsius Conversion
Back scale:
Multiplication and Division, Inch to Centimeter conversion
Misc. Conversion Table

Easterly (John I.) Mfg.



REF Easterly Rafter Calculator
 Easterly Rafter Calculator
Made in USA - Designed and built by John I, Easterly, Healdsburg, CA 1940
Front Scale
[Scale A Length ] Common Rafter, Hip-Valley, Scale B
Instructions
Archive - Clay Castleberry Collection


REF Easterly Rafter Calculator
 Easterly Rafter Calculator
Made in USA - Designed and built by John I, Easterly, Healdsburg, CA c1941-1954
Front Scale
[Scale A Length ] Common Rafter, Hip-Valley, Scale B
Instructions
Archive - Clay Castleberry Collection


REF Easterly Rafter Framer - Pickett 1082
Easterly Rafter Framer - Pickett 1082
Made in USA by Pickett - Designed by John I, Easterly, Watsonville, CA c1957
Front Scale
CR (Common Rafter) Hip-Valley Scale [ G ] H
Back scale
CR (Common Rafter) Hip-Valley Scale [ E ] F
Archive - Clay Castleberry Collection

Empire Pencil Co. "Pedigree"

Note: No relation to "Empire Made".


P186 Empire Pedigree Precision
ISRM 13.00.00.53		 Empire Pedigree Precision
Made in USA - Empire Pencil Co., Shelbyville, NY
Note: Same stock and cursor as Sterling 587
Front Scale
A [ B, CI, C ] D, K
Back Scale: [S, L, T ]
Instruction Sheet 1.35Mb


Empire Pedigree Pocket
ISRM 20.04.01.082		 Empire Pedigree Pocket
Made in USA - Empire Pencil Co., Shelbyville, NY
Note: Same stock and cursor as Sterling 587
Note: Red scales in this instance are not for denoting inverted scales.
Front Scale
A [ B, CI, C ] D, K
Back Scale: [S, L, T ]
Gift of Philip Stanley Collection


Empire Pedigree Compact Pocket
ISRM 21.06.10.15		 Empire Pedigree Pocket
Made in USA - Empire Pencil Co., Shelbyville, NY
Note: Same stock and cursor as Sterling 587
Note: Red scales in this instance are not for denoting inverted scales.
Front Scale
A [ B, CI, C ] D, K
Back Scale: [S, L, T ]
Gift Bob Dehn Collection


S157 Empire Pedigree 240		 Empire Pedigree 240 (retail package)
Made in USA - Empire Pencil Co., Shelbyville, NY
- retail package
Front Scale
A [ B, CI, C ] D, K
Back Scale: [S, L, T ]
Note: Red scales in this instance for cost reduction, not necessarily for denoting inverted scales.

Educational Instruments Inc



REF Educational Instruments Corona 1		 Educational Instruments Corona 1 - c1965
Made in USA by Educational Instruments, Inc - 9cm Diam plastic
Note: Need help with company information
Front Scale:
C, D, R (= DI), A, K, L, S, T, ST
Back:
The back, which has a window to the front disk for more surface area for equations, contains a mine of information. 112 formulae; 2 trig tables, 41 conversion factors 6 series expansions, 2 numerical integration formulae 13 numerical constants, 72 integrals, 36 differentials
Archive - Scan provided by Rod Lovette (UK) Collection

ESCO - Engineering Sales Co., Engineering Mfg. Co., Mayline Co.

Founded in 1939 by H.L.DeLisle as ESCO - Engineering Sales Company, reselling OEM products, then became Engineering Manufacturing Co. in 1946 where it was purchased by E.H.May and incorporated, and started making products such as steel drafting tables as a Mayline brand. It was renamed Mayline Co. in 1953 and continues to this day.


Engineering Mfg Co ESCO 6002
ISRM 20.04.01.355		 Engineering Mfg Co ESCO 6002 - c1946
Made in USA for Engineering Sales by Acu-Design. ESCO Logo on slide.
Note: Red lettering faded - Brand can be seen in bright light
Front Scale (Scale similar to Post 1457, Charvoz-Roos 109)
T Cot, DF [ B, K, L, C ] D, S Cos, ST
Back Scale
Fraction-Decimal [ CF, CIF, CI, C ] Trig identities
Gift of Philip Stanley Collection


REF Engineering Sales Co., No. 6004
REF		 Engineering Sales Co., No. 6004 - c1940
Made in USA for Engineering Sales by Acu-Design
Note: Red lettering faded - Brand can be seen in bright light
Front Scale (Scale similar to Post 1457, Charvoz-Roos 109)
T Cot, DF [ B, K, L, C ] D, S Cos, ST
Back Scale
Fraction-Decimal [ CF, CIF, CI, C ] Trig identities
Archive - Belongs to Jaan Raamot, Retired EE (Avia in Colorado)

Favor-Ruhl



REF Favor-Ruhl A-400 		Favor-Ruhl A-400
Made in USA by Charvos-Roos (or Acu-Rule) - c1945
Front Scale
LL0, LL00, A [ B, K, CI, C ] S Cos, ST, T Cot,
Back Scale:
L, LL1, DF [ CF, CIF, CI, C ] D, LL3, LL2
Cassou Oliver Collection - Found this in Illinois

G. Felsenthal & Sons, Chicago - Established 1898

"No sign posts on the mountains... no concrete highways in the soup... no rocky peak so kind it steps aside to let a plane go by. Yet, with the navigational instruments precision made by Felsenthal, in Felsenthal Plastics, Army Airmen fly the toughest country in the world." G. Felsenthal & Sons ad in Flying Magazine, January 1944
Made in Chicago Museum Fesenthal History.
Felsenthal started as a novelty comkpant but ended up making the bulk of plastic Aviation slide rules for the US Government during WWII. Click on the Dalton Dead Reckoning Computer to go to the Aerospace Gallery, where there are five specimens shown.
Felsenthal 450A Generic Slide Rule 		Felsenthal 450A Generic Slide Rule
Made in USA by G. Felsenthal and sons, Chicago - c1960
Front Scale: A [ B, CI, C ] D
Back Scale: S, L, T
Back of slide: Decimal Equivalents
Well: Equivalents
Gift of Philip Stanley Collection

Foxboro

The Foxboro Comapany, Foxboro, Massachussettes. USA, developed a series of slide rules to assist gas engineers in sizing control valves and in performing calculations relating to orifice meters. These devices were not widely used in gas distribution except for the design of those city gate stations using orifice meter runs to measure the flow of gas. Ref: natgasedu.com


REF Foxboro Flow And Valve Rule c1965		 Foxboro Flow And Valve Rule
Made in Japan by Hemmi.
Front Scale
Back Scale
Archive - Courtesy of Jerry Kostro, wwww.NatGasEdu.com


Foxboro Flow And Valve Rule c1970
ISRM 11.11.11.01		 Foxboro Flow And Valve Rule
Made in Japan by Hemmi. No cursor on this version.
Front Scale
Back Scale
Donated By Carlee Heit, Houston Texas, in Memory of her husband Ray Heit


Foxboro Flow And Valve Rule (c1975)
ISRM 11.11.11.05 		Foxboro Flow And Valve Rule
Made in USA - This is constructed much like a slide chart, but with a cursor like a slide rule.
Front Scale
Back Scale
Sizing control valves usually involved solving for the valve's Cv based on flow rate, flowing temperature, specific gravity, and upstream and downstream pressures. The most common orifice meter calculation involved solving for the "beta ratio" or "beta" (the ratio between the diameter of the orifice and the inside diameter of the meter run pipe, or "d/D") given the maximum flow, flowing temperature, specific gravity of the gas, static pressure and line size of the run.
Given the small size of the slide rules, these devices were intended to be more portable than precise. If more accurate answers were required, the user was referred to the companion book "Principles and Practice of Flow Meter Engineering" by L. K. Spink.
The slide rule above shows sides for both English (red or maroon) and Metric (blue) units.
Donated By Carlee Heit, Houston Texas, in Memory of her husband Ray Heit

Fullerton Engineering Sales Co.

Fullerton Engineering Sales Co. - A distributor of rebranded Acu-math and Concise slide rules located at 4623 York Blvd. Los Angeles 41, California, phone: Clinton 6-2286. the telephone number dates the company in the 1960's. The instruction manual for a Fullerton No.1450, A re-branded Concise 28N circular slide rule, showed an address for Fullerton Sales Company, 811 Milford Street, Glendale 3, California. Telephone 245-7261. That same manual, on page 4, lists 8 model numbers of circular slide rules with varying scale sets.
Fullerton 320 Acudial
Image Needed
Fullerton 320 Acudial
For small business use.
Made in Japan by Concise - 9.6cm Dia
Front Scale: D ( C, CI, A, K )
Back: Conversion table and calendar


Fullerton-Acu 400
ISRM 		Fullerton-Acu 400 - Simplex Trig - c1968
Made in USA - Wrap Over Cursor
Front Scale
S, K, A [ B, CI, C ] D, L, T
Back Blank
Original owner: (Markings on slide rule) Paul Cohen


Fullerton-Acu 400
ISRM 		Fullerton-Acu 400 - Simplex Trig - c1968
Made in USA - Wrap Over Cursor
Front Scale
S, K, A [ B, CI, C ] D, L, T
Back Blank
Original owner: (Markings on slide rule) Frank Merhar
Donated by the Huang Collection.



Fullerton-Acu 600 Basic Trig
ISRM 12.06.24.31		 Fullerton-Acumath 600 Basic Trig - 1959
note: double end plates- duplex cursor - flat edge plastic stock
Made in USA by Acumath for Fullerton - Oval Acumath Logo
Front Scale
S, S&T, K, A [ B, CI, C ] D, L, T
Back Scale
Conversion Table [Fraction=Decimal] Trig properties
Donated by the Huang Collection.
The collector, who prefers to remain anonymous, obtained a B.S. degree in Physics from Taiwan's National Tsing Hua University in 1971. His love for computation has encouraged him to build a collection of slide rules, HP and TI calculators, as well as abaci, many displayed at ISRM.


Fullerton-Acu 1240
ISRM 12.10.22.02


In Retail Box w/sheath w/manual No44


Fullerton-Acu Manual No44 (4.15MB PDF)


Pamela Lanier Wolfe (c1969)

Pamela Lanier Wolfe Brown and Husband, Harry Edson Browne (c2000)
Fullerton-Acu 1240 - c1969
Made in USA by Acumath for: Fullerton Engineering Sales Co.
Front Scale
K, A [ B, CI, C ] D, L
Back Scale: None
Donated by Pamela Lanier Wolfe Browne, Kernersville, North Carolina
This slide rule belonged to Pamela Lanier Wolfe Browne (1948 - ). In 1966, she began working as a secretary for the Onondaga County Department of Transportation, Division of Engineering, Syracuse, NY. She studied drafting in her spare time and on April 26, 1969 she took the Engineering Aid I civil examination. When she received her grade she was informed that she was the first woman in NY State to pass the exam and fill the position. On October 24, 1970 she passed the Engineering Aid II exam. She used this slide rule 1969-1971 while working on highway projects in the office. After much pleading with her boss, the Transportation Commissioner, he finally permitted her to work in the field with fellow male engineers conducting traffic counts.
Note: Pamela is the widow of Harry Edson Browne (1933-2006). They were married in 1985. Harry Browne was an inspirational speaker who wrote 19 books that sold more than 2 million copies. In 1996 and 2000 he was the nominee of the Libertarian Party for President of the United States.


Fullerton 1450 Acudial Version 1 (Concise 28N)
ISRM 14.01.10.06		 Fullerton 1450 Acudial Version 1 (Concise 28N)
Made in Japan by Concise - 8.4cm Dia
Front Scale
D ( C, CI, A, K )
Back: Conversions
Gift of Bill Wehrend Collection


Fullerton 1450 Acudial Version 2 (Concise 28N)
ISRM 14.01.10.07		 Fullerton 1450 Acudial Version 2 (Concise 28N)
Made in Japan by Concise - 8.4cm Dia
Front Scale
D ( C, CI, A, K )
Back: Conversions
Gift of Bill Wehrend Collection
Fullerton 1450 Manual (2.31MB PDF)


Fullerton 1450 Acudial Version 3 (Concise 28N)
ISRM 17.08.24.08		 Fullerton 1450 Acudial Version 3 (Concise 28N)
Made in Japan by Concise - 8.4cm Dia
Front Scale
D ( C, CI, A, K )
Back: Conversions
Gift of Nancy Morris of Tempe, Arizona. Dustin E. Morris Collection
Fullerton 1450 Manual (2.31MB PDF)


Fullerton 1452 Acudial
REF		 Fullerton 1452 Acudial
For small business use.
Made in Japan by Concise - 10.0cm Dia
Front Scale
D ( C, CI, A, K )
Back: Conversions
Archive - ebay photo
Fullerton 1454 Acudial
Image Needed
Fullerton 1454 Acudial
For general engineering and business use.
Made in Japan by Concise - 10cm Dia
Front Scale: L, D ( C, CI, A, K )
Back Scale: DI, D (ST1, ST2, L )
Fullerton 1455 Acudial
Image Needed
Fullerton 1455 Acudial
For general engineering and business use.
Made in Japan by Concise - 10cm Dia
Front Scale: L, D ( C, CI, A, K )
Back Scale: DI, D (SI, TI1, TI2, SITI )
Fullerton 1456 Acudial
Image Needed
Fullerton 1456 Acudial
For general engineering and business use.
Made in Japan by Concise - 10cm Dia
Front Scale: A, D ( C, CI, B, K )
Back Scale: L, D (S, T1, T2, S&T )


Fullerton 1458 Acudial (Concise 300)
REF		 Fullerton 1458 Acudial (Concise 300)
For Expert Engineering Use
Made in Japan by Concise - 11.0cm Dia
Front Scale
K, A, D ( C, CI, B, L )
Back: LL3, LL2, D (C, S, T1, T2, ST )
Archive - C. Hamann Collection, Germany
Fullerton 1499 Stadia Computer
Image Needed
Fullerton 1499 Stadia Computer
Made in Japan by Concise - 10cm Dia
Front Scale: D ( sin, cos, cos2)
Back Scale: D (C, S, ST, L )

Gemini Engineering - Houston, Texas
Gemini Engineering Caliputer
REF 		Gemini Engineering Caliputer
Made in USA by Gemini Engineering, Houston, Texas. - c1967
Note:material is stainless Steel. 1959 U.S. Patent No 2,874, 478
Invented by Thomas P. Faulconer of Rancho Sante Fe, California.
Front Scale: 4in [ Depth Venier 0-25, Outside, Venier 0-25, C ]
Back Scale: 13cm [ B Squares and Square Roots, Read Circular Areas]
Archive - Ebay Photos

Instructions and 1970 Advertisement in The Rotarian.

Gerber Scientific Instrument Co.



Variable Scale
Evolution

Brochures
H. Joseph Gerber - (1924-1996) United States. Inventor/businessman. Gerber immigrated to Hartford, Conn., from Austria in 1940, and completed high school in two years while working full time. 1947 graduate from Rensselaer Polytechnic Institute. Gerber's first patented invention was the Gerber Variable Scale, which he conceived in 1945 while he was a college student. He built the product in his garage. Leaving his job a few years after graduating, he drove around America for months at a time to visit engineering departments of military and industrial organizations. He sold his existing products by day, and invented new ones at night. It was the first product to launch the Gerber Scientific Instrument Co. Gerber, who held nearly 650 patents, was awarded the National Medal of Technology in 1994, given to him by U.S. President Bill Clinton. Several of his inventions are on display at the Smithsonian Institution. The story of his invention The Inventor's Dilemma: The Remarkable Life of H. Joseph Gerber was written by his son, David J. Gerber. (Yale University Press, 2015)


Gerber Variable Scale Model TP007100B
ISRM 20.08.24.01
 Gerber Variable Scale - Type TP007100B
Made in USA - Gerber Scientific Instrument Company
Scales (23.5 cm): R1, I, L10
Original owner: Peter Stanek (1937-2014), mathematician, purchased c1960
Gift of Jean Bee Chan and Kenneth Ross of San Rafael, California.
Notes: The heart of the Variable Scale is a high precision triangular spring whose coils act as calibrating lines. When extended, all coils are equally spaced. A second spring carries numerical markings for each 10th coil of the triangular spring.
Easy to use, the Variable Scale makes computations directly -- without conversion -- on graphs, curves and recordings. Expandable for any ratio, any setting, it is used on graphical work where reading, plotting and interpolating are required.
The use extends the Variable Scale's springs by sliding a hairline over three fixed, engraved scales: 1) an Inch scale that indicates the number of inches extended; 2) a Reciprocal scale that identifies the number of coils per inch; and 3) a Logarithmic scale that indicates the logarithm of the extension. Each scale, in combination with the spring, solves a group of common problems. by Rod Lovette


Gerber GraphAnalogue Model GA-103
ISRM 16.05.10.01
 Gerber GraphAnalogue GA-103
Made in USA - Gerber Scientific Instrument Company
Scales: RI, RF, RC,I, F, CM, T, T, S(Sin)C(Cos), D(Degree Scale), ()2, ()2,()1/2,()1/3, L10, Le, Le, P
Notes: The heart of the Variable Scale is a high precision triangular spring whose coils act as calibrating lines. When extended, all coils are equally spaced. A second spring carries numerical markings for each 10th coil of the triangular spring.
Donated by Marie Sayre Cole of Wappingers Falls, NY, Daughter of C.L. Sayre Jr.
He graduated in 1947 with a B.S. in mechanical engineering from Duke University and was commissioned as an ensign in the US Navy. He served on the USS Hobson (DMS-26) until 1949. He then attended Stevens Institute of Technology completing his M.S. in mechanical engineering, specializing in fluid mechanics. He was recalled to active duty as Lieutenant JG in the US Navy in 1952 due to the Korean War He joined the University of Maryland faculty as an assistant professor in 1955 and received his Ph.D. in 1961. He continued on the faculty at University of Maryland through 1987 as a full professor and served as associate Dean of Engineering for several years during his tenure. He authored an early book on computer aided design in 1985; "Design and Graphics Using the Apple Computer, an Engineer's Guide." In 1993, he was appointed Professor Emeritus of Mechanical Engineering, University of Maryland and in 1998 received an A. James Clark School of Engineering Outstanding Commitment Award. Full Biography (pdf). This specimen was given as a gift to John Hopkins University directly by. H. Joseph Gerber march 10, 1953. See Letter.

Gisholt Machine Co.



Gisholt Time Computer
REF S415
 Gisholt Time Computer
Made in USA By Gisholt Machine Co., Madison, WI
This is thought by some to have been made by Richardson, but it is based on a 10-10-1920 patent, that alters from Richardson's, by having two slides.

All sheet steel construction, dual nested slides.
Front Scale
G(RPM), F(Time) [ E(Length), B(Dia) ] [ A(Cutter Dia), C(Speed-FPM) ] D(Feed)
Back: Recommended cutter diameter/RPM


Gisholt Time Computer
REF		 Gisholt Time Computer
Made in USA By Gisholt Machine Co., Madison, WI
This is thought by some to have been made by Richardson, but it is based on a 10-10-1920 patent, that alters from Richardson's, by having two slides.

All sheet steel construction, dual nested slides.
Front Scale
G(RPM), F(Time) [ E(Length), B(Dia) ] [ A(Cutter Dia), C(Speed-FPM) ] D(Feed)
Back: Gisholt Machine Co. address

Gisholt Time Computer 1951
Plastic Slide chart version. Scans by Jim Cerny


Gisholt Time Computer
ISRM 18.07.11.14		 Gisholt Time Computer
Made in USA By Whitehead-Hoag, Newark, NJ for Gisholt Machine Co., Madison, WI
All plastic film construction, dual nested slides.
Front Scale
G(RPM), F(Time) [ E(Length), B(Dia) ] [ A(Cutter Dia), C(Speed-FPM) ] D(Feed)
Back: Advertisement
Gifted by Phil Stanley of Worcster, Massachussettes
Philip Stanley retired from engineering to become a full-time dealer in and appraiser of antique scientific instruments and tools as The Analytical Engine. He has written two books on antique measuring instruments, and numerous articles on instruments and technology, and has given several talks on these subjects. Phil appeared on the Antiques Road Show on PBS, as an appraiser, in 2012, 2013, 2014.

Globemaster®

The Globmaster® name was first registered (#0932070) as a trademark in 12-10-1959 and expired in 2-5-1992. The correspondent listed for GLOBEMASTER is JOHN D. GOULD of Merchant, Gould, Smith, Edell, et al, 3100 Norwest Center, 90 South Seventh Street Minneapolis, MN 55402 . The GLOBEMASTER trademark is filed in the category of Paint Products , Lubricant and Fuel Products , Pharmaceutical Products , Machinery Products , Firearm Products , Paper Goods and Printed Material , Houseware and Glass Products , Yarns and Threads , Clothing Products , Lace, Ribbons, Embroidery and Fancy Goods , Meats and Processed Food Products , Smoker's Products . The description provided to the USPTO for GLOBEMASTER is OIL CANS. In 1971, a U.S. federal trademark registration was filed for GLOBEMASTER by TROPHY PRODUCTS, INC., HOUSTON 77055.



Globemaster 62200 5 inch slide rule
ISRM 20.04.01.320		 Globemaster 62200 5 inch slide rule
Made in Japan - Compare with Santok and other Generic slide rules in the Japan gallery
Front Scale :A [ B, CI, C ] D, K
Back: Blank
Gifted by the Philip Stanley Collection.


Globemaster 62205 10 inch slide rule
ISRM 14.07.02.34		 Globemaster 62205 10 inch slide rule
Made in Japan
Front Scale :S, K, A [ B, CI, C ] D, L, T
Back: Blank
Gifted by the Ed Millis Collection, Dallas, Texas.

Graphic Calculator Company

The Graphic Calculator Company was founded in 1940 in Chicago, Illinois and later in 234 James Street, Barrington IL, (847) 381-4480. They made custom slide charts as well as low cost give-away promotional slide rules (very similar to C-Thru, but with a nicer cursor). Their website was slide-charts.com, but they do not seem to be in business as of 2012.



Stephenson-Pfahl Hardenability Slide Rule
ISRM 19.10.27.02

 Stephenson-Pfahl Hardenability Slide Rule - 1944
Made in USA by Graphic Calculator Co. for Carnigie-Illinos Steel Corporation.
Note: Riveted assembly in folding wallett
Front Scale: C (Carbon) [Mn - Manganese] [P - Phosporus] [S - Sulphur] [SI - Silicon] [NSI - Nickel] [CSR - Chromium] [MSO Molybdenum] [V - Vanadium] [Grain Size] [blank] [For Percentages, For Multiplication] Ideal Critical Diameter, Jominy Distance]
Slide Chart: The End-Quench Hardenability Curve Chart and Instructions.
Back adv:USS Carilloy Alloy Steels..
Belonged to Thomas C. Graham, Sr.

Gift of Thomas C. Graham,Jr. President and CEO of Hotwork-USA.
This specialized slide rule belonged to Thomas C. Graham Sr. who is widely known as one of the steel industry's most successful and innovative executives. A former draftsman and civil engineer, he was named president of Jones & Laughlin Steel Corp. in 1974. In 10 years, he took the company through a merger with Youngstown Sheet & Tube Co., and then an acquisition of Crucible Steel's Midland plant. He departed J&L in 1983 to restructure the United States Steel Corporation, where he served as president of the U. S. Steel Group of USX Corp. until 1991. Over that period, finished products went from 8 man-hours per ton down to 4 man-hours per ton, contributing to a dramatic swing in profitability for the company. Graham had similar results as chairman and CEO of Washington Steel Co. (1991-1992). From 1992 to 1994, Graham Sr. was president and CEO of Armco Steel Co. L.P., predecessor of AK Steel. He was the founder and served as chairman and chief executive officer of AK Steel Corp. (1994-1995), and remained as chairman until his retirement in 1997. After his arrival at Armco Steel in 1992, the company went from being the least profitable U.S. steel company to earning the most profit per ton, and producing steel with the fewest man-hours per ton, of any of its major competitors over the following five years. He is now with TC Graham Associates as a founding member.Mr. Graham is a Korean war veteran.


General Motors Truck Performance Calculator
ISRM 19.10.27.02 		General Motors Truck Performance Calculator - 1946
Made in USA by Graphic Calculator Co.
Note: Riveted cardboard construction
Front Scale (Nested slides)
Engine Rev per minute,Loaded Rolling Radius, % Grade on Concrete [ A Gear Ratio, C Indirect Gear, [ Speed in MPH, Torque in Lbs Ft, ] B Gross Vehicle Weight lbs ] Rim Pull-in lbs direct gear, Indirect Gear)
Back scale: D [ E Dirt, Rough Dirt, Worn Gravel,Good gravel, Concrete (Road resistance)
Back adv:General Motors Overseas Operations, New York.
Gift of Philip Rodley of Upperhutt, New Zealand


Concrete Volume Computer
ISRM 17.09.14.02 		Concrete Volume Computer - 7 inch long c1936-1953
Made in USA by Graphic Calculator Co. ( or?)
Front Scale
A(Thickness) [ B(Width), C(Length) ] D(Cubic Yards)
Back adv:Stewart & Nuss, Inc, 410 Thorne, Fresno, CA Phone: 2-3125
Gift of Michelle Black, belonged to father John Black, Morro Bay, California


Concrete Volume Computer
P212 		Concrete Volume Computer 1995 - 8 inch long
Made in USA by Graphic Calculator Co for Louis Gerson Co, Middleboro, MA 02346
Front Scale
A(Thickness) [ B(Width), C(Length) ] D(Cubic Yards), E(Dia-Inches)
Back Scale: Estimates for cubic yard
Back adv: Lyman-Richey Sand & Gravel, Omaha, NB 68131


Gerson Bituminous Concrete Calculator
 ISRM 12.09.26.61 		Gerson Bituminous Concrete Calculator - 7 inch long
Made in USA by Graphic Calculator Co. for Gerson Co, Mattapan, Massachussettes ©1953
Front Scale
A(Length-Feet) [ B(Width-Feet), C(Thickness-Inches)] D(Weight-Tons)
Back adv: Economy Ready-Mix Concrete Co., Waukegan, Illinos
Donated by the Huang Collection


Proportional Slide Rule
 ISRM 12.09.26.62 		Proportional Slide Rule (c1950)
Made in USA by Graphic Calculator Co
Front Scale
A (Copy Dimension) [ B (Engraving Dimension), C (Dimensions larger than 12) ] D (Dimensions larger than 12)
Back adv: Warner Bros. Co. 3330 Birch St. KE6-3882 (Connecticut phone exchange?)
Donated by the Huang Collection


Graphic - Percentage Calculator
C23		 Graphic - Percentage Calculator
Made by Graphic Calculator Co., Barrington, Illinois - 1962
6in (15cm) Dia Plastic Film disc
Front Scale
Sales ( % of Sales) or Number ( Percent )
Donated by Jack Rababeh, Senior Engineer at ASC


Stock Yield Slide Rule
ISRM 12.02.19.02
Calculating Yield Example
Stock Yield Slide Rule
Made in USA by Graphic Calculator Co for Lamson Bros &Co. Fort Dodge, Iowa
Front Scale
Price [ Annual Dividend, Dollars] Percentage Yield
Back slide: Commission Rates
Donated by Nancy Day in Kansas City, Missouri

William M. Day 		William used this slide rule while working as a Credit Union Examiner for the State of Missouri. He was born on June 27, 1920 in Fort Dodge, Iowa. He volunteered for WWII than afterwards attended the State University of Iowa (now Univesity of Iowa) He majored in business and mathematics and graduated in 1949. He reurned to the Air Force and worked incommunications positions. He retired from military service as a Major in 1972. He worked an additional 10 years as a Credit Union Examiner. He lives in Kansas City, MO.


Graphic Calculator - Profit Finder
C25		 Graphic Calculator - Profit Finder
Made by Graphic Calculator Co., Chicago, Illinois - 1954
8in (20.2cm) Dia Plastic Film disc
Front Scale
# of Items, Selling Price ( Markup, Profit )
Donated by Jack Rababeh, Senior Engineer at ASC

B.F. Grizzle, Washington, DC 20044

Samuel S. Dannaway, PE, is a registered fire protection engineer and mechanical engineer wrote an article that stated :"Many years ago, students in the fire protection engineering curriculum at the University of Maryland were given the Grizzle Stick to assist them in their hydraulics classes. Those courses were ENFP 312 Fire Protection Fluids, which I took in the fall of 1976, or ENFP 310 Fire Protection System Design I, which I took in the spring of 1977."

Note: B.F. Grizzle slide rules are duplicated in the Lawrence Gallery.



Lawrence - Water Line Capacity Slide Rule, B.F. Grizzle
ISRM 14.07.02.88		 Lawrence - Water Line Capacity Slide Rule, B.F. Grizzle
Made in USA by Lawrence for B.F. Grizzle, Copyright 1944
Front Scale
Inside Pipe Diameter [ Length of Line, Flow Rate CuFt/Hr, Gallons/24Hr] Coefficient of Roughness, Loss of Head, Pressure drop]
Back: Not Shown
Gift of Ed Millis, Dallas, Texas


B.F. Grizzle Water Line Capacity Slide Rule		 B.F. Grizzle Water Line Capacity Slide Rule (1971)
Made by B.F. Grizzle Co., Washington, DC. Copyright 1944, renewed 1971
8in (20.2cm) Sandwiched slide chart tyrp construction
Front Scale
Nominal Pipe Size, Inside Diameter- inches [Length of Line in Feet, Cubic Feet per Second, Gallons per 24 hrs, Gallons per Minute ] Coefficient of Roughness, Loss of Head in Feet, Pressure Loss - Lbs. per sq. In.
Back: Instructions
Gift of Ed Millis, Dallas, Texas


Lawrence - Gas Pipe Line Slide Rule, B.F. GrizzleISRM 18.03.20.05
 Lawrence - Gas Pipe Line Slide Rule, B.F. Grizzle
Made in USA by Lawrence for B.F. Grizzle, P.O. Box 126, Terre Haute, Indiana, Copyright 1944. Note: has K&E cursor
Front Scale: B (Inlet Gauge Pressure), A (Outlet Gauge Pressure)[ A1 (Outlet Gauge Pressure), C (Pressure Ext.), Q (Cu. Ft per Day), L (Length in Miles)] D (Inside Diameter -inches), Spec. Gravity, Pressure Base, E, F (Pressure Extension), H (% line Looped)
Back Slide: BI(Outlet Gauge Pressure), CI(Pressure Ext.), K (Equivalent Length per Mile of Loop), R, M, G (% Increase Capacity), DL (Diameter of Loop Line)
Belonged to Robert N. Curry. Gifted by his friend Alice Bowling of Louisville, Kentucky.
Robert N. Curry He was a 1949 graduate of Western Kentucky University. Bob was the head of Measurement for Texas Gas Transmission Corp and authored a book on Natural Gas processing Fundementals of Natural Gas Conditioning. He was former chairman of the AGA Transmission Measurement Committee. Several of his slide rules are currently in the ISRM galleries.


REF Lawrence - Low Pressure Gas Line
Flow Capacity Slide Rule, B.F. Grizzle		 Lawrence - Low Pressure Gas Line
Flow Capacity Slide Rule, B.F. Grizzle
Made in USA by Lawrence for B.F. Grizzle, Copyright 1941
Front Scale
Length of Line, Specific Gravity [ Pressure drop (Inches), Pressure drop (ounces), Cubic Feet/Hr (B, A,)] Nominal Pipe Diameter (A, B)
Back: Not Shown
Archive - Scan donated by David Rance collection. Sassenheim, The Netherlands

GUCO or Guco Line, Marcus Hook, Pennsylvania

Guco Line, 815 Market Street, Marcus Hook, PA 19061, 856-547-1532


GUCO No.139 Mannheim Pocket Slide Rule
ISRM 18.04.06.147		 GUCO No.139 Mannheim Pocket Slide Rule
Made in USA - Thin Film stock and slide (similar to C-Thru design).
Dimensions: 6-1/2 in x 1-1/4 in
Front Scale: A [ B, CI, C ] D
Back of slide: Fractional to Decimal equivalents
Back: 6 inch, 15.3 cm
Back Promo: BCS Associates.
Gift of the Leroy Hausler Collection.

GUCO No.300 Concrete Estimator Pocket Slide Rule
REF		 GUCO No.300 Concrete Estimator Pocket Slide Rule
Made in USA - Thin Film stock and slide (similar to C-Thru design).
Dimensions: 6-1/2 in x 1-1/4 in
Front Scale: A(Thickness) [ B(Width or Height), C(Length) ] D(Cu.Yds.), E(Diameter in Inches)
Back of slide: Fractional to Decimal equivalents
Back: Instructions.
Back Promo: CalMat Co.

No. 371 Concrete and Lumber Estimator
ISRM 16.06.02.09		 No.371 Concrete and Lumber Estimator
Made in USA - Maker Unknown Thin Film stock and slide (similar to GUCO and C-Thru design).
Dimensions: 8 in x 1-1/2 in
Front Scale: A(Thickness) [ B(Width or Height), C(Length) ] D(Cu.Yds.), E(Diameter in Inches)
Back of slide: Lumber Scale in Window
Back: Instructions.
Back Promo: Warner Bros. Co.
Gift of the Donald Bachelor Collection.


GUCO No.1004 Date Finder Circular Slide Rule
ISRM 18.04.06.146		 GUCO No.1004 Date Finder Circular Slide Rule
Made in USA
Dimensions: 4 in Diameter
Front Scale: Month, Days (Number of Weeks)
Back :Blank
Back Promo: Edgewater Automation.
Gift of the Leroy Hausler Collection.

Guedon, Camden, New Jersey

Also: 418 Schenectady (SCNDY) St., Schenectady (SCNDY), N.Y.


Guedon Metal pocket (1943)
ISRM 12.06.27.01		 Guedon Metal pocket
Made in USA Camden, NJ - all sheet metal construction
Front Scale
A [ B, CI, C ] D
Front Scale: Conversions
Back: 5in(fractions) 125mm
Donated by Scott Reynolds of Vintage Calculators, Inc, California.
In the MIT Museum, an internal letter dated January 20th, 1943 and signed A.W. Keuffel, the letter reads: "Herewith a Slide Rule known as a Vest Pocket Slide Rule made by Guedon, Camden, New Jersey. I do not think they will have much success selling this rule, because of the inherent disadvantages this metal rules has over our regular Pocket Slide Rule. Nevertheless, at the wholesale price of $.50. I do not see how they are able to make this article. After you have examined it, turn it over to Mr. Schneider for filing with the samples."
Another of these was donated by David Hecht, Alexandria, VA and ISRM, in turn,gifted this to the Smithsonian Institute in Washington, DC. upon request.


Guedon Metal pocket Version 2 cursor (1943)
ISRM 20.04.01.249		 Guedon Metal pocket Version 2 cursor
Made in USA Camden, NJ - all sheet metal construction
Front Scale
A [ B, CI, C ] D
Front Scale: Conversions
Back: 5in(fractions) 125mm
Gift of Philip Stanley Collection.


Guedon 448 Pocket (Thin Film Cursor) - S.G.D.G. MARC
ISRM 13.09.16.02		 Guedon 448 Pocket (Thin Film Cursor) - S.G.D.G. MARC
Made in France (Unis standard) for Guedon, 418 Schenectady (SCNDY) St., Schenectady (SCNDY), N.Y.
Front Scale
5in // A [ B, C ] D
Back: Blank


Guedon - S.G.D.G. MARC License
P176		 Guedon - S.G.D.G. MARC License
Made in France (Unis) for Guedon, Schenectady N.Y. Note: Po Box 853
Front Scale
5in // A [ B, C ] D
Back: 13cm


Guedon - S.G.D.G. MARC License
ISRM 14.07.02.94		 Guedon - S.G.D.G. MARC License
Made in France (Unis) for Guedon, Schenectady N.Y. Note: Po Box 223
Front Scale
5in // A [ B, C ] D
Back: 13cm
Well: Builders Iron Foundry Ad
Gift of Ed Millis, Dallas, Texas.


Guedon "The Miniature" Vest Pocket Slide Rule (1943)
ISRM 20.04.01.256		 Guedon "The Miniature" Vest Pocket Slide Rule
Made in France for Guedon, Camden, NJ.
Front Scale
4.5 inch // A [ B, C ] D
Back: 14 cm
Gift of Philip Stanley Collection.


Guedon Plastic Pocket
P062		 Guedon Plastic pocket - Closed simplex
Made in France for Guedon, Camden N.J.
Front Scale
A [ B, C ] D
Back: Decimal Equivalents

John Henschel Company, 195 Marine St., Farmingdale, New York 11735

John Henschel & Company was incorporated in 1925 in New York, NY by John Henschel and C. Ufert, to manufacture and deal in tracing paper and other kindred products. They re-branded OEM slide rules and drafting tools under their company name. The last known artifact is from Aristo in 1952. but the company was refernced in a 1970 publication from the University of Texas Interscholastic League Beginner's Slide Rule manual by Otto G. Brown.
Henschel 1083 (Aristo) 4 Inch (1952)
ISRM 20.04.01.150 		Henschel 1083 (Aristo) 4 Inch dc523 (Mar 1952)
Made in Germany
Front Scale
4in // A [ B, CI, C ] D, K
Back Scale: [ sin, lg, tg ]
Well Promo: Henschel Co.
Gifted by Philip Stanley Collection


Henschel No.1096 (c1930)
ISRM 12.06.18.02		 Henschel No.1096
Made in Germany by Albert Nestler A.G.
Front Scale
10inch // A [ B, CI, C ] D, K || 25cm
Back Scale: [S, L, T ]
Back: Conversion Table


Henschel 1087-A (c1940)
ISRM 20.04.10.392		 Henschel 1087-A
Made in USA (possibly by Roos) for Henschel Co. N.Y.
Material: Painted scales on wood
Front Scale
A [ B, CI, C ] D, K
Back Scale: [S, L, T ]
Back: Conversion Table, Printed label.
Well: Fraction/Decimal Conversions.
Gift of Philip Stanley Collection


S197 Henschel 2020P (c1940)		 Henschel 2020P - Duplex
Made in USA - possibly by Acu-Rule or Charvoz-Roos.
Front Scale
LL0, LL00, A [ B, K, CI, C ] S, ST, T
Back Scale
L, LL1, DF [ CF, CIF, CI, C ] D, LL3, LL2
Warning: Do not clean this model using Windex w/ Ammonia-D. This is not an engine-divided rule and the ink wipes off. (You'd think I'd learn)


Henschel 2025 (c1930)
ISRM 13.09.15.04		 Henschel 2025 (c1930)
Made in Germany for Henschel Co., N.Y. by Albert Nestler.
Note 'Railroad Track' style divisions
Front Scale
28cm // q (%), Z(C) [ T (D), M(CI), D(C), K(D), L || 11inch
Back Scale: [ £, s, d ]
Back: Equivalents, very faded.
Note: Missing cursor. See the above Henschel No.1096 (c1930) for the proper cursor.

Henry Herbet, 483 5th Avenue, New York, NY(1938)
Hyde Optical Slide Rule (c1939) Photography
ISRM 20.04.01.316		 Hyde Optical Slide Rule (c1939) Photography
Made in USA by P.A.S. Co. NY, for Henry Herbert Distibutor.
Note 0.010in thick Stainless Steel. Sold for $1.50 in 1939 See Radio and Television Ad.
Front Scale
Focal Length inches, Relative Hyperfocal Distance [ 6in, Apertures in f stops, Diameters Enlargement, Hyperfocal Distances, 15.2cm ] Object Distance ft.
Back::Instructions
Back Slide: Equivalents
Gift of Philip Stanley Collection

Human Factors Research, Inc.
Los Angeles, San Diego
Human Factors Research Statistics c1960
ISRM 20.04.01.313		 Human Factors Research Statistics
Made in USA (possibly by Pickett) by Human Factors Research, Inc..
Note Painted aluminum laminated construction.
Front Scale: 3 Statistical Scales [ 3 Statistical Scales ] 3 Statistical Scales
Back Scale: K, A [ B, CI, C ] D, L
Gift of Philip Stanley Collection
Pickett manufactured the Pickett N-525 Stat-Rule and the manual was written by by William Harris Ph.D.of Human Factors Research, Inc. It is very possble that Harris had Pickett make the above slide rule first and then Pickett decided to add the scale set on their regular slide rule line.

INDECO, Bridgeport, Connecticut (1934-1938)


 On an October 4, 1938 letter from A.W.Keuffel to W.L.E.Keuffel, AWK writes:"Mr. Misik advises that one of our employees, Mr. Katzenmair, informed him that the makers of the INDECO Rule, which was made in Bridgeport, Ct., have gone out of business. Mr. Katzenmair received this information from someone acquianted with the owners of INDECO, who advised him that the owner had spent all of his wife's money in promoting this rule without success and had finally given up making them." Courtesy of the MIT Museum who received the K&E archives. K&E kept track of all their competitors.

On the left is a January, 1934 INDECO Slide Rule ad in Boys Life Magazine, the official publication of the Boy Scouts of America.



Indeco Pocket Slide Rule (1935)
ISRM 13.09.12.01		 Indeco Pocket Slide Rule (1935)
Made in USA - Stainless Steel sheetmetal stock and celluloid slide.
Dimensions: 1/4 in x 6 in x 3/4 in
Front Scale: A [ B, C ] D
Back: Blank
Note: This was the first design and came with a leather sleeve.


Indeco Pocket Slide Rule (1938)
REF		 Indeco Pocket Slide Rule (1938)
Made in USA - Stainless Steel sheetmetal stock and metal slide.
Note: back is stamped "Pat. Pend.", but there is no record of one being issued.
Dimensions: 1/4 in x 6 in x 3/4 in
Front Scale: K, A [ B, S, T, C ] D, L
Back: Blank
Note: this was the second, most complex and final design before the company went out of business.
Archive - photo courtesy of the MIT Museum Collections

Kel-Co (A. Stuart Kelsey Company) Plainview, New York.

The Kel-Co slide rules were the brainchild of A. Stuart Kelsy. They were produced in 1969-1971 in Plainview, NY by Kel-Co Publishing, his own firm. He later designed the Handicapping slide rule and later the 1979 electronic calculators made APF Electronics.

A. Stuart Kelsey July 1980 Manufactured & Distributed by APF ELECTRONICS, INC. 1501 Broadway New York, New York 10036 Under license from Cannella Corp., Syracuse, N.Y. ©1979-1980 K-C Associates Pompano Beach, Florida.

The following text is from the PREFACE to the Electronic Kel-Co calculator Manual (1MB PDF) Read the manual to understand the math behind the slide rules and calculator:

The Kel-Co Class Computer is based upon the same principles as the Kel-Co Class Calculator (slide rule). The calculator, first marketed in 1969, became the most widely used handicapping aid in North America, and was considered by most unbiased experts as the most successful ever developed. The electronic computer, by its very nature, is much easier to use, more accurate, and much faster than the slide rule.
The unit has two modes of operation: the "computer mode" which contains the pre-programmed formulas for the Kef-Co class ratings, and a "calculator mode" which is a standard calculator. Regular Kel-Co users will note that some of this manual has been reproduced directly from the third edition of the Kel-Co Class Calculator (Sept. 1971) and from 1979 printing. Some sections are completely new and others have been partially rewritten. To you new Kel-Co users, welcome to the club! Please take the time to understand, absorb, and then apply the principles in this manual. Success at the races is within your grasp, depending only on you!
Good Luck!


Kel-Co Class Calculator For Thoroughbred Race Horses
ISRM 18.07.11.17		 Kel-Co Class Calculator For Thoroughbred Race Horses
Made in USA - Kel-Co Publishing Plainview, NY - 1969
Front Scale
[ Earnings (Rate)] [ F2 ] FI (Finish Value), S (Show), P (Place) W (Wins)
Note: Clever 2-Slide Extruded PVC construction, Cursor with labels. (stuck due to shrinkage)
Gifted by Phil Stanley of Worcster, Massachussettes

Kel-Co Class Calculator For Thoroughbred Race Horses
S337		 Kel-Co Class Calculator For Thoroughbred Race Horses
Made in USA - Kel-Co Publishing Plainview, NY - 1971
Front Scale
FI (Finish Value), W(#wins) [ T (Track T1, T2, T3, T4), F2 ] [ E (Earnings) ]
Note: Clever 2-Slide Extruded PVC construction

Kel-Co Trot Calculator For Thoroughbred Race Horses
ISRM 18.07.11.18		 Kel-Co Trot Calculator For Thoroughbred Race Horses
Made in USA - Kel-Co Publishing Plainview, NY - 1969
Front Scale
[ A ] [ Finish Position, Time, Post Position ] B, C
Note: Clever 2-Slide Extruded PVC construction, Cursor with labels. (stuck due to shrinkage)
Gifted by Phil Stanley of Worcster, Massachussettes

Key Line

Note on Instruction sheet: "A KEY LINE EXCLUSIVE IMPORT - ALL RIGHTS RESERVED - SOLE IMPORTER AND DISTRIBUTOR" Obviously Key Line was not the sole importer of Concise slide rules, but maybe at the beginning, they tried. The first sheet of the manual is titled "Key Lines's Concise Circular Slide Rule". The manual is a very early two-sided instruction sheet, folded in 3rds.


Key Line's Concise Circular Slide Rule
ISRM 14.01.10.08		 Key Line's Concise Circular Slide Rule
Made in Japan by Concise - 8.4cm Dia
Front Scale
D ( C, CI, A, K )
Back: Conversions in a radial configuration.
Sleeve Advertising: Dole Company, Chemical Division, San Jose, California, 408 292-4484
Gift of Bill Wehrend Collection
Key Line Concise (28N) Inst (1.72MB PDF)

Walter J. Kudlaty
Listed in Slide Rule Who's Who Gallery


Kudlaty Press Tonnage Calculator 1949
ISRM 12.09.01.02		 Kudlaty Press Tonnage Calculator
Made in USA - Designed by Walter J. Kudlaty - 1949
Front Scale (BENDING)
Metal Thickness, A (Tonnage Required per Linear Ft.)[ B (Female Die Opening), Material, C (BlankingLength), Material ] Metal Thickness, D (Tonnage Required to punch hole)
Back Scale (DRAWING)
Area, E (Tonnage Required) [ F (Tonnage Required), Material, Blankholding Index, G Metal Thickness, H (Blankholding Tonnage Required)
Donated By Laurie Deiter of Louisville, Colorado, in memory of father H. McFadden
H. McFadden used this slide rule in his work as an engineer.

Lakeside Industries Inc., Minneapolis, Minnesota

Lakeside Industries (later Leisure Dynamics, Inc.) also made famous toys like the 'Gumby' doll and 'Gumby's Pal, Pokey' (a horse) under royalty. The lighted table was used in other drawing products like "Heroes of the West", Disney characters, fashion designer and custom styling, and board games like "Aggravation".


Lakeside Draft-A-Plan Pocket Slide Rule (1962)
ISRM 15.03.19.01
 Lakeside Draft-A-Plan with Pocket Slide Rule (as part of kit)
Kit was made by Lakeside Toys, a subsidiary of Lakeside Industries, Inc
Made in USA by Engineering Instruments, 1962
Front Scale
A [ B, CI, C ] D, K
Draft-A-Plan was a beginning drafting kit which had a small electric back lighted table, T-square, 30-60 and 45 degree triangles (made by C-Thru Industries) and this re-branded slide rule made by Lawrence Engineering. It included drafting vellum, lettering guides, tracing and blueprint paper and a small book on drafting practice and math using the slide rule. This kit is missing two small objects, a pencil sharpener and a rubber eraser. A 1974 catalog still shows it being produced. The book for the kit Drafting is Fun can be downloaded on the left (14MB Pdf).


The A. Lietz Co., San Francisco, California (aka ALCO)

Founded by German immigrant Adolph Lietz (1850-1923). The A. Lietz Co. was an American manufacturer of Engineering, Surveying, Mining and Nautical Instruments Instruments. The firm incorporated in 1892 under the name "The A. Lietz Company". Based in San Francisco, California, their building burned down in the 1906 earthquake and was rebuilt. In 1910 a complete line of drafting materials, including slide rules, and engineering equipment was added. They rebranded slide rules made in the United States, Germany, England and Japan, the models changing during the pre and post WWII era. In 1947, after 65 years of production, the firm discontinued the manufacturing of surveying instruments and begins to market Sokkisha instruments, made in Tokyo. Their business changed to being an importer and distributor. The Frank Paxton Company purchased the business in 1965 and moved its headquarters to Kansas City, Missouri. The company name was changed to "The Lietz Company." In 1980, Sokkisha acquires Lietz and establishes divisions in Australia and Europe. The Lietz distribution center moves to Overland Park, KS. In 1990 Sokkisha celebrates 70th anniversary and changes its name to SOKKIA. Lietz sold re-branded slide rules manufactured by foreign companies Relay/Ricoh, Concise, Sun Hemmi (Japan) and Faber-Castell (Germany) as well as American compaines like Gilson, Lawrence and Pickett. It is not known, at this point, when slide rules dissapeared from their catalogs.
News Articles and Catalogs - Only the pages relevant to Slide Rules
1894
Science and Engineering magazine		 1893
15pages
13MB PDF		 1897
17pages
16MB PDF		 1908
8pages
12MB PDF		 1911
2pages
386KB PDF		 1919
17pages
762KB PDF		 1926
23pages
685KB PDF		 1938
14pages
9.72MB PDF


Lietz 2971-N (c1950)
ISRM 11.12.03.01		 Lietz 2971-N - post WWII
Made in Japan by Sun Hemmi
Front Scale (extended)
5 in // A [ B, CI, C ] D
Back Scale
[ S, L, T ]


Lietz 2971-P Rietz
ISRM 09.01.12.118		 Lietz 2971-P Rietz - date code 57-11 (Nov 1957)
Made in Germany by Faber-Castell
Front Scale (extended)
11 cm, 4 in // K, A [ B, CI, C ] D, L
Back Scale
[ S, S&T, T ]
Donated by David Hecht


Lietz 2971-P Rietz U.S.A. - Version 2
ISRM 12.03.02.17		 Lietz 2971-P Rietz U.S.A. - Version 2
Made in U.S.A. by Charles Bruning
Front Scale (extended)
12.5cm // A [ B, CI, C ] D, K \\ 5 in
Back Scale
[ S, L, T ]
Original owner: Walter Francom, 120-8th Ave, San Francisco (marked on case and name on slide rule).
Donated by Richard Davis, Las Vegas, Nevada


Lietz 2971-P Pocket Rietz - Version 3
ISRM 20.04.01.296
 Lietz 2971-P Pocket Rietz - Version 3 (Inch Scale)
Made in Denmark for A. Lietz Co..
Front Scale
5 inch // K, A [ B, CI, C ] D, L
Back Scale: [ S, S&T, T ]
Back: 13 cm, Lietz Logo
Gift of Philip Stanley Collection.
PDF


Lietz 2971-P Pocket Mannheim - Version 4
ISRM 20.04.20.01
 Lietz 2971-P Pocket Mannheim - Version 4 (CM scale)
Made in Denmark for A. Lietz Co..
Front Scale
11cm, 5 inch // K, A [ B, CI, C ] D, L
Back Scale: [ S, S&T, T ]
Back: Lietz S.F,; L.A. Logo
Gift of Wayne Farmar.
EN and DE - PDF


Lietz 2972 4inch Pocket Mannheim
ISRM 20.04.01.213
 Lietz 2972 4inch Pocket Mannheim (pre-WWII)
Made in Germany (Nestler?) for A. Lietz Co.(pre-WWII)
Front Scale
K, A [ B, CI, C ] D, L
Back Scale: 5 inch [ S, L, T ] 10 cm
Back: Lietz Logo
Gift of Philip Stanley Collection.


Lietz 2974N (re-branded Hemmi 40)
Ebay Listing Photo
 Lietz 2974N - Same as Hemmi 40 c1937
Made in Japan by Sun Hemmi
Front Scale (extended)
A [ B, C] D,
Back Scale
[ S, S&T, T ]

Ref:S261 - Hemmi No. 40


Lietz No.2974N
REF		 Lietz No.2974N c1942
Made by Lawrence - c1942 (Same as 10-B) for the A. Lietz Co. San Francisco, California.
Material: Painted Scales on Wood Stock
Front Scale:
A [ B, CI, C ] D, K
Back: Not Shown
Scan Donated by David Rance, The Netherlands


Lietz 2975 Mannhiem (UK)
ISRM 12.03.02.19		 Lietz 2975 Mannhiem (UK)
Made in England by Unique (U.S.R.C.)
Front Scale:
A [ B, CI, C ] D, K
Back Scale: [ S, L, T ]
Well:Decimal Equivalents of Fractions
Donated by Richard Davis, Las Vegas, Nevada


Lietz 2976 Mannhiem (USA -Lawrence 10-B)
ISRM 15.04.06.02		 Lietz 2976 Mannhiem (USA - Lawrence 10-B)
Made in USA by Lawrence Engineering. Shows Pat. Pend.
Front Scale: A [ B, CI, C ] D, K
Back Slide: Blank
Back:white painted background. Blue color text. Decimal Equivalents of Fractions


Lietz 3050N
ISRM 09.02.28.02		 Lietz 3050N - Duplex
Made in USA by Charvoz-Roos for Lietz - cWWII
Front Scale
K, A [ B, S, T, C ] D, DI
Back Scale
Fraction/Decimals [ L, C2, C1 ] D1, D2, D
Note: This has double length scales making it like a 10 inch slide rule


Lietz 3054L
REF S124		 Lietz 3054L - Duplex
Made in USA by Lietz - Pre WWII
Front Scale
K, A [ B, S, T, CI ] D, L
Back Scale
DF [ CF, CIF, C ] D
Note: Later models of the 3054L, post WWII, were made by Sun hemmi and later Relay/Ricoh


A. Lietz Co. No.3077 Midget Circular Slide Rule
ISRM 21.08.07.20		 A. Lietz Co. No.3077 Midget Circular Slide Rule (1938)
Note: Also displayed in Circular Gallery.
Made in USA by Gilson for A. Lietz Co. San Francisco and Los Angeles, Calif.
3 plastic cursors on aluminum disk
Front Scales: C,CI,A,K,Log,LL1,LL2,LL3,LL4,
Back Scales: Binary, Fraction,Drill,Thread, Millimeter


Lietz Model No 3625-10 Dial Rule (c1964)
Ebay Listing Photos		 Lietz Model No 3625-10 Dial Rule (Pickett 101-C)
Made in USA by Pickett, 10.2cm dia Aluminum disk with 3 plastic cursors
Front Scale: C, CI, A, AF, L, FA, LL2, LL1, DS, DT, M
Back Scale: C, S, ST, T, Fractions-Decimal
Note: Scale Labels embossed in RED on transparent cursor


Lietz 3625-20 8.4cm
REF C06		 Lietz 3625-20 8.4cm Dia
Made in Japan by Concise - 8.4cm[ Dia
Front Scale
D ( C, CI, A, K )
Back: equivalents

Lutz Co.

See the Relay Ricoh gallery

Master Electric Co., Dayton, Ohio

The Master Electric Company was founded in 1920 by Everett Larsh and headquartered in Dayton, Ohio The company built electric motors, electric gear-motors, motor controls and motor brakes. They supplied private industry as well as the U.S. government. In 1958 the company merged with Reliance Electric Co. of Cleveland, Ohio. Master's headquarters and plant in Dayton were closed in 1961, with a loss of 1450 jobs and moved to Columbus, Indiana. Reference: Scott Adamietz and vintagemachinery.org

Master Electric Co. Pocket
ISRM 20.04.01.385		 Master Electric Co - Closed simplex
Made in USA by Master Electric Co. Dayton, Ohio.
Note that this is version has a trig scale on the back of the slide.
Front Scale
5in // A [ B, C ] D
Back scale: 13cm [ S, L, T ] Back Advertising: Master Electric Motors
Gift Of Philip Stanley Collection.


P239 Master Electric		 Master Electric - Simplex
Made in USA by Master Electric - Dayton, Ohio
Front Scale
5in // A [ B, C ] D
Back scale: [S, L, T ]
Back adv: Master Electric Motors

Mead Corporation, Hulman Building, Dayton, Ohio. In 1846, Daniel Mead founded the Mead Corporation in Dayton, Ohio. The firm originally manufactured paper, but the company dramatically expanded its product line during the twentieth century. By the time of Daniel Mead's death in 1891, the Mead Corporation was one of the largest paper producers in the United States, with paper mills in Kingsport, Tennessee, Brunswick, Georgia, and Escanaba, Michigan, as well as several plants in Ohio. More Mead Corp. History. During the 1980s, a national recession during the 1980s caused the company to sell off many of its affiliated industries and streamlined its products and services. The company primarily manufactured paper and continued to participate in the electronic storage industry. The Mead Corporation is currently known as MeadWestvaco.


ISRM Mead Official Pocket Rule		 Mead Official Pocket Rule
Made in Japan. Distributed by Westab, Dayton, Ohio a division of Mead Corp.
Front Scale
A [ B, CI, C ] D, K
Back: Blank
Donated by David Hecht, Alexandria, VA




ISRM Mead 98-1114 Official 10 inch Rule		 Mead 98-1114 Official 10 inch Rule
Made in Japan for Mead Corp. Dayton, Ohio
Front Scale
A [ B, CI, C ] D, K
Back Scale:
[ S, L, T ]
Donated by David Hecht, Alexandria, VA

Neal Feay Co.

Goleta and Santa Barbara, California. Metal slide rules.


Neal Feay Model CR-6 Cost Reduction Slide Rule
ISRM 20.04.01.426		 Neal Feay Model CR-6 Cost Reduction Slide Rule
Made in United States by Neal Feay Co., Goleta, California.
Front (Unit Cost vs. Learning Curves): 95%, 90%, 85%, 83% [ C ] D, 80%, 78%, 75%
Back (Average Cost vs. Learning Curves): 95%, 90%, 85%, 83% [ C ] D, 80%, 78%, 75%
Gift of Philip Stanley Collection.


Neal Feay Model LR-6 (Log-Curvlinear) Cost Reduction
ISRM 20.04.01.426		 Neal Feay Model LR-6 (Log-Curvlinear) Cost Reduction Slide Rule
Made in United States by Neal Feay Co., Goleta, California.
Front (Unit Cost vs. Learning Curves): 95%, 90%, 85%, 80% [ C ] D, 75%, 70%, 65%
Back (Average Cost vs. Learning Curves): 95%, 90%, 85%, 80% [ C ] D, 75%, 70%, 65%
Gift of Philip Stanley Collection.


Neal Feay Anofax Computair Direct Vector Computer
REF 		Neal Feay Anofax Computair Direct Vector Computer
Made in United States by Neal Feay Co., Santa Barbara, California.
Front: Mach,temp, Alt, Pressue ( Mach one, Density Altitude ) Speed and Distance
Back: Groundspeed, Airspeed, Crab Angle, Winds
Archive - Smithsonian Air and Space Museum.

Nobema Drawing Instruments, New York City, NY

The Main company was Nobema Drawing Instruments, Germany.
Nobema No.F4 Pocket Slide Rule
ISRM 20.04.01.059		 Nobema No.F4 Pocket Slide Rule
Made in England by Unique NOBEMA Nobema Drawing Instruments, USA
A [ B, CI, C ] D, K
Back: blank
Nobema Logo


NOBEMA 10-B
REF		 NOBEMA 10-B c1942
Made by Lawrence - c1942 (Same as 10-B) for Nobema Drawing Instruments, USA
Material: Painted Scales on Wood Stock
Front Scale:
A [ B, CI, C ] D, K
Back: Not Shown
Scan Donated by David Rance, The Netherlands

D.Van Nostrand Co.Inc, New York

Publishers of Scientific and Technical Books
The D. Van Nostrand book company, was founded by Dutch American David van Nostrand (1811-1886) (see expanded Biography) in New York City, in 1848. In 1869, "Van Nostrand's Engineering Magazine" was founded, followed later by "The American Chemical Journal". Van Nostrand Publishing also became involved with the building of the Brooklyn Bridge by publishing John A. Roebling's "Long and Short Span Railway Bridges".During the late 19th century, They published books on slide rules as early as 1884.Van Nostrand Publishing initiated a book series on Science. The Science series was edited by George Plympton, professor of physics and engineering at the prestigious Brooklyn Polytechnic Institute. The famous Van Nostrand Science Series had as many as 127 titles when it was completed in 1902. It was claimed that the Van Nostrand Science series helped educate a generation of engineers. The series was still being sold in the 1920s. Prior to WWII, they rebranded OEM slide rules.and packaged them as a point of sales item to sell their slide rule instruction books, such as Speed and Fun with Figures (1922).

  • The Use of the Slide Rule, pub1900 by F.A.Halsey. See Reference
  • Solution of railroad problems by the slide rule, pub1913 by , Edward Richard Cary, (b1865- d????).
  • Speed and Fun With Figures, pub 1922, by T. O'Conor Sloane, J.E. Thompson and H.E. Licks
  • A Manual of the Slide Rule, pub1930 by J.E. Thompson,
  • The Slide Rule, pub1949 by Lee H. Johnson


D.Van Nostrand Circular Slide Rule, Copyright 1932
15.03.24.01		 D.Van Nostrand Circular Slide Rule, Copyright 1932
Printed in USA by D.Van Nostrand Co.Inc, New York
Front Scale
A ( B )
Back:
Instructions


D.Van Nostrand Mannheim Type Slide Rule
MagnifyingCursor, 1938 Version 1
15.04.03.02

 D.Van Nostrand Mannheim Type Slide Rule, Magnifying Cursor, c1938
Made in Festus, Missouri by Acu-Rule for D.Van Nostrand Co.Inc, New York
Note: This was sold pre-WWII.with a magnifying glass captured by a brass cursor.
Front Scale: A [ B, CI, C ] D, K
Back Scale:10 inch [ S, L, T ] 25 cm
Back: Equivalents/Fraction Conversions (printed paper label glued to stock)

Note: The instruction manual is the same one written by Paul Jones who founded Acu-Rule slide rule company, and found with many early Acu-Math slide rules. This slide rule was sold as part of an offer to buy their book Speed and Fun With Figures, by T. O'Conor Sloane, J.E. Thompson and H.E. Licks, copyrighted 1922 and published in 1938 for this kit. This is the 1st version of the kit.


D.Van Nostrand Mannheim Type Slide Rule
New Clear Cursor, 1943 Version 2
15.04.03.01

 D.Van Nostrand Mannheim Type Slide Rule, New Clear Cursor, 1943
Made in Festus, Missouri by Acu-Rule for D.Van Nostrand Co.Inc, New York
Note: This was sold mid-WWII. Because of the war effort and material shortage, the slide rule was cost reduced. the stock was made thinner and the magnifying glass and brass cursor was made of cellulose, glued together.
Front Scale: A [ B, CI, C ] D, K
Back Scale:10 inch [ S, L, T ] 25 cm
Back: Equivalents/Fraction Conversions (printed paper label glued to stock)
Note: The instruction manual is the same one written by Paul Jones who founded Acu-Rule slide rule company, and found with many early Acu-Math slide rules. This slide rule was sold as part of an offer to buy their book Speed and Fun With Figures, by T. O'Conor Sloane, J.E. Thompson and H.E. Licks, copyrighted 1922 and published in 1938 for this kit. This is the 2nd version of the kit.

The above package was received by Theodore A. Ziegler, 36 E. Ely, Alliance, Ohio and was postmarked 2-19-1943. It had a 12 cent stamp on it. Note in the Febuary 1943 issue of Popular Science that they were advertising the magnifying cursor version. I hope Theodore was not dissapointed when he got a different slide rule variation.



D.Van Nostrand Mannheim Type Slide Rule
1938 and 1943 Kit Comparisons as packaged
with the book Speed and Fun with Figures

Novotni Slide Rule Co. - Chester, PA,and Media, PA.

John L. Novotni (1893-1966), a blacksmith of Czech descent, is listed in the 1920 census as working in a foundry in Delaware County, Penn. In the 1910s, he worked at an automobile and wagon repair shop in Oaklyn, N.J., with Andrew W. Kelly and John Hornyak, who received a patent (U.S. Patent 1,210,488 issued January 2, 1917) for this design and sold it as the Kelkay Weight Slide Rule by 1920. By 1922 Kelly and Hornyak and Novotni were selling other celluloid rules, such as the Paper Box Board Rule. By 1929 Novotni was selling slide rules under the name of the Novotni Slide Rule Company and was having the rules made of Bakelite. It appears he lived in Chester, PA at that time. In 1937, he moved to Media, Pa. According to Novotni's daughter, Evelyn Novotni Bond, steel companies continued to purchase the Weight Slide Rule until 1992. Smithsonian, National American History Museum


Novotni Merchants Percentage Rule
ISRM 18.09.29.01		 Novotni Merchants Percentage Rule
Made in USA - Novotni Slide Rule Co. - Chester, PA. Ca. 1917
Patented 1-21-1917
Material: Black layered Fiberboard with a white top Laminate.
Front Scale
Retail Price [ PerCent, Cost ] Cost Per, Quantity
Back: Blank
Note: Very Rare. Only specimen known to exist

Patent US 1,210,488


Novotni Weight Slide Rule Early Version
ISRM 18.09.29.01		 Novotni Weight Slide Rule - Dual Slides
Made in USA - Novotni Slide Rule Co. - Media, PA. Ca. 1913-1916
Patent pending
Material: White Fiberboard Laminate.
Front Scale: Thickness [ Width, Length ] [ Shape, Material ] Weight (lbs)
Back: Blank
Marked Pennsylvania Forge Corp. Tacony, Phil. PA D.C
.


Novotni Weight Slide Rule (Bakelite)
S312		 Novotni Weight Slide Rule - Dual Slides
Made in USA - Novotni Slide Rule Co. - Media, PA. Ca. 1929
Andrew W. Kelly and John Hornyak, "Slide Rule" (U.S. Patent 1,210,488 issued January 2, 1917)
Material: Black Bakelite, Gold silkscreen.
Front Scale
Thickness [ Width, Length ] [ Shape, Material ] Weight (lbs)
Back: Blank
Manual recommends this "...for use in a Blacksmith shop"
Archive - ISRM has gifted this to the Math History Department of the Smithsonian Institute, Washington, DC. D.C.


Novotni Weight Slide Rule (Masonite)
S340		 Novotni Weight Slide Rule - Dual Slides
Made in USA - Novotni Slide Rule Co. - Media, PA. ca. 1959
Material: Masonite wood fiberboard, Black on white silkscreen.
Front Scale
Thickness [ Width, Length ] [ Shape, Material ] Weight (lbs)
Back: Blank
Manual changed with the times " ... for use in a Forging shop"


Novotni Paper Board Slide Rule
REF		 Novotni Paper Board Slide Rule
Made in USA - Novotni Slide Rule Co. - Media, PA. Patent 1-2-1917
Front Scale
Width [ Length, Count ] [ Count Index, Basis Index ] Basis
Back: Blank
Archive - Scan by Phil Stanley.Collection


Novotni Machine Time Slide Rule Tooling
ISRM 21.08.17.02		 Novotni Paper Board Slide Rule Tooling
Note: Rare partial printing plate, half the length of the original. Assume to have been cut in half to destroy the tool. Look at mirror image to read the scales.
Dimensions of wood block: 5 x 2.5 x 1 inch. Cast lead typeface.
Made in USA - Novotni Slide Rule Co. - Media, PA.
Front Scale: Diameter for lathe or width for Planer [ Length, Feed in Inches ] Average speed in feet per minute, Time (Hours)
At this point in time, ISRM can not find any specimens of a Novatni Machine Time Slide Rule. It may have ben a prototype idea that never came to pass. Whatever decision that was made on why they decided not to produce it, can only be speculated on, but at least we evidence of its existence.

James R. Paisley Calculator Company, Pittsburgh, PA.



Paisley Calculator (Aluminum Body)
REF: OS 252 		Paisley Calculator
Made in USA - Paisley Calculator Company c1939
Material: Aluminum body, celluloid scale
Front Scale (length: 20 inches): A [ B ] Dimensions: 4.2 cm x 25.5 cm x 10 cm
Archive - Dr. Paul J. Tarantolo Jr.Collection

This slide rule, designed by James R. Paisley (1901-1960) of Pittsburgh, PA copyrighted the A and B scales of the Paisley Calculator on February 23, 1939 which consists of two white celluloid bands, each about one inch (25mm) wide and twenty inches (50cm) long, that revolve within an elliptical aluminum case. The case has clear plastic windows on both sides. Five green indicator lines appear on each of the windows. The bands are printed with identical logarithmic scales; the left is marked A, and the right is marked B. Two knurled knobs rotate the bands. Large round metal pins inside the knobs can be locked to force the bands to rotate in unison.


Paisley Calculator, (Bakelite Body)
REF: NMAH 1987.0183.01 		Paisley Calculator
Made in USA - Paisley Calculator Company c1940
Material: Bakelite, celluloid scale
Front Scale (length: 20 inches): A [ B ] Dimensions overall: 4.2 cm x 25.5 cm x 10 cm
Archive - National Museum of Natural History

This slide rule, designed by James R. Paisley (1901-1960) of Pittsburgh, PA copyrighted the A and B scales of the Paisley Calculator on February 23, 1939 whichconsists of two white celluloid bands, each about one inch wide and twenty inches long, that revolve within an elliptical brown and black Bakelite case. The case has clear plastic windows on both sides. Five green indicator lines appear on each of the windows. The bands are printed with identical logarithmic scales; the left is marked A, and the right is marked B. Two knurled knobs rotate the bands. Large round metal pins inside the knobs can be locked to force the bands to rotate in unison. It was built for Paisley Company by Bastian Brothers of Rochester, N.Y.

Parisian Novelty Co.

The Parisian Novelty Company was originally established in Chicago, in 1898, by Louis L Joseph, the American born son of a German immigrant. He produced a variety of novelties that could be used in advertising, many based on designs by inventor Joseph Komorous ( ?-1945), who was the manufacturing superintendent. J.Komorous has at least 18 U.S. patents, starting in 1915 through 1938, which include face powder compacts, watch fobs, office products, campaign buttons, and his slide rule Patent US02,073,421 of 1937. This patent is the basis for generic linear slide rules made by the Graphic Calculator Co, and C-Thru as the designs and construction are the same. They were either licensed or the patent had expired. The Parisian Novelty Company Building was abandoned in 2008. See Collecting Vintage Compacts for a great history of their company. Joseph Komorous died in 1945 and their is evidence his son Louis J. Komorous filled in at Parisan Novelty as L.J. has a patent issued in 1952. Parisian Novelty became Matchless Parisian Novelty in 2008.



Parisian Novelty Co.Cost And Selling Price Indicator
ISRM 14.07.02.89		 Parisian Novelty Co.Cost And Selling Price Indicator c1950
Made in USA - Parisian Novelty Co., Chicago, Illinois
Patent US02,073,421 Inventor: Joseph Komorous, Riverside, Ill.
Material: Folded Thin plastic film.
Front Scale
Cost per dozen, Cost per Unit[ Units, % Profit ] Selling Price per Unit
Back: Promo advertising: Eckrich Meats
Gift of Ed G. Millis, Dallas, Texas


Parisan Novelty Co. Pocket Slide Rule
ISRM 14.10.09.07		 Parisian Novelty Co. Pocket Slide Rule c1950
Made in USA - Parisian Novelty Co., Chicago, Illinois
Patent US02,073,421 Inventor: Joseph Komorous
Riverside, Ill.
Material: Folded Thin plastic film.
Front Scale
A [ B, CI, C ] D
Back: Promo advertising: Dittman And Greer, Inc. Providence, R.I., Reps for Chromolox,
Gift of Ed Wright



Parisan Novelty Co. Cost And Selling Price Indicator
ISRM 14.11.10.01		 Parisan Novelty Co. Cost And Selling Price Indicator c1950
Made in USA - Parisian Novelty Co., Chicago, Illinois
Patent US02,073,421 Inventor: Joseph Komorous
Riverside, Ill.
Copyright 1934 - U.S. Groves and Copyright 1935 J. Komorous.
Material: Folded Thin plastic film. 8-1/4 inch long.
Front Scale
Cost per Dozen , Cost per Unit[ Set arrow at cost, Selling Price % of Profit ] Selling Price per Unit
Back: Promo advertising: Wimmer's Meat Products, Inc. West Point, Nebraska

Perrygraph Corp., Hayward, MI. (Slide Rule Scale Examples)

Perygraf is best known for slide charts which have their own gallery at ISRM (albiet a giant back log of specimens waiting to be scanned). The slide scharts show here are a hybrid as they have standard slide rule scales (A,B,C,D) incorporated into the design, and in some cases, an external cursor with hairline.


Chemical Mixing Calculator
ISRM 18.09.07.44		 Chemical Mixing Calculator ©1964
Made in USA by Perrygraf for Mixing Equipment Co.
Note: This is a unique and rare slide chart that uses many slide rule specific scales
Front Scales: G/F. LM1, M1, K, A [ B, LM2, M1, CI, C ] D, LL1, LL2, LL3
Slide Back: 1inches, Centimeter, Tables.
Back: Instructions
Gift of Donald Bachelor Collection


W-K-M Valve Sizing Calculator		 W-K-M Valve Sizing Calculator
Made in USA by (Perrygraf ?) for W-K-M ACF Industries, Houston, TX.
Slide Rule Scales: [ C ] D

Belonged to Robert N. Curry. Gifted by his friend Alice Bowling of Louisville, Kentucky.
Robert N. Curry was a 1949 graduate of Western Kentucky University. Bob was the head of Measurement for Texas Gas Transmission Corp and authored a book on Natural Gas processing Fundementals of Natural Gas Conditioning. He was former chairman of the AGA Transmission Measurement Committee. Several of his slide rules are currently in the ISRM galleries.


ITT Valve Sizing Calculator		 ITT Valve Sizing Calculator ©1967
Made in USA by Perrygraf for ITT Controls.
Slide Rule Scales: K, A [ B, C ] D, L

Belonged to Robert N. Curry Collection. Robert authored the book "Fundamentals of Natural Gas Conditioning"


Daniel Air Gas Oriffice Flow Calculator		 Daniel Air Gas Oriffice Flow Calculator ©1967
Made in USA by Perrygraf for ITT Controls.
Slide Rule Scales: [ C ] D

Belonged to Robert N. Curry Collection.


Perrygraph Daytron Systems Antenna Gain 1993		 Perrygraph Daytron Systems Antenna Gain ©1993
Made in USA by Perrygraf for Daytron Systems.
Slide Rule Logarithmic Scales.

Gift Of Gregor Playle.

Plus and Minus Company Corp, New York, N.Y.
Sum-Up Slide Rule Company, N.Y.


Copyright 1939

1941 Advertisement 		Max B.A. Doring, of Brooklyn, and Samuel Lees, of New York, copyrighted the Plus and Minus slide rule in 1939
Sum-Up Slide Rule Co Ad in Radio Magazine, December 1941: SUM-UP SLIDE RULE - The new Sum -Up Plus and Minus Slide Rule is an aid to making and checking calculations for mechanical drawings, laying out machine - shop jobs, making patterns, etc. Unlike the usual slide rule which multiplies and divides, this rule adds, subtracts, and converts decimals of an inch, fractions of an inch, and millimeters interchangeably, and the answer can be read in fractions, decimals, and millimeters. It is made by the Sum-Up Slide Rule Company, 114 Liberty Street, New York


Plus And Minus Slide Rule 1939 (wood)
20.05.15.01 		Plus And Minus Slide Rule - c1939 (wood)
Made in USA by Plus And Minus Slide Rule Corp.
Designed by Max B.A. Doring and Samuael Lees
Note: wood stock has same dimensions as Lawrence Engineering. The cursors are interchangeable.
Front Scale: A (0-1in)1/64 [ B (1-0in) 1/64, C (1 - 0.000in) decimal ] D (0-25.4mm).
Back: Blank
Gifted by anonymous donor.


Plus And Minus Slide Rule 1941 (slidechart)
REF 		Plus And Minus Slide Rule - c1941 (slidechart)
Made in USA, by Sum-Up Co. Designed by Max B.A. Doring and Samuael Lees copyright 1939
Note: wood
Front Scale: A, B [ C, D ] E, F, G
Back: Instructions
Archive photo, eBay
Intro - The slide rule is designed to add, subtract and convert fractions and decimals of an inch and millimeter, and at the same time,, give the answer in fractions and/or decimals of an inch and/or millimeters. It is a time-saver and a safeguard against mistakes in calculations by other methods. Try a simple problem and see for yourself how easy it is to use this slide rule.
Directions - TO ADD: Locate one figure of your problem in scales A, B, E F or G; set the hairline of runner over this figure. Locate the other figure of the problem on the sliding scales C or D and set the slide so that the figure is under the hairline of the runnder. The sum of the two figures is found in the other scales in line with the O on the slide. Move hairline of the runner to this O and read your answer in fractions, decimals of an inch/and or millimeters.

Precision Scale Co., Phoenix, Arizona

Founded by Arthur Frederick Eckel - United States. Inventor and manufacturer. Originally of Chicago. Cofounded R.C.Pickett & A.F. Eckel Company in 1943 with Ross C.Pickett to make aluminum slide rules. while residing in Evanston, Illinois. He left the company in 1948, which was then renamed P&E. A 1949 U.S. patent #2466983 was issued to A.F. Eckel with Louise Pickett being the assignee. Has several other United States patents (US #2615630) and his wife Myrtle Elizabeth (Scott) Eckel is shown as the attorney. Eckel later formed Precision Scale Company located in Phoenix, Arizona, producing all-metal slide rules to limited markets. George Washington University in Washington D.C. shows an A.F. Eckel as having graduated there in 1922. His estate sale in Phoenix produced several unfinished slide rules.


Precision Scale Co Model 1751 Log Log 10 Hyperbolic
REF Got a scan or one to donate? 		Precision Scale Co Model 1751 Log Log 10 - c1950
Made in USA by Precision Scale Co founded by Art Eckel
Note: Like Picketts, the stocks were printed in white and yellow.
Front Scale: LL1, LL2, LL3 A [ B, S, ST, T, CI, D ] LL/1, LL/2, LL/3, LL/4
Back scale: Unknown
Archive photo, Scan by Stephen Kay of Solon, Ohio


Precision Scale Co Model 1752 Log Log e Hyperbolic
REF Got a scan or one to donate? 		Precision Scale Co Model 1752 Log Log e Hyperbolic - c1950
Made in USA founded by Art Eckel
Front Scale
SH1, SH2, TH, A [ B, T, ST, S, CI, C ] D, DI, K, L
Back scale: Unknown
Archive photo, source unknown


USAF Type A-1 Aerial Photo
ISRM 04.09.30.01 		USAF Type A-1 Aerial Photo - c1950
Made in USA for Astrodyne by Precision Scale Co. (founded by Art Eckel)
Front Scale
L, A, DF [ CF, CIF, T, S, C ] D, DI, K
Back scale
Ground Size, Ground Speed, [Image size, Cycling Time, Focal Length ] Altitude
USAF Manual 8.69Mb

Prestige



P188 Prestige Precision - North American Engines		 Prestige Precision - North American Engines
Made in USA for N.A. Engines, Philadelphia, PD.
Front Scale
K, A [ B, CI, C ] D, L
Back Adv: North American Engines Co. Inc.

Science Services, Inc., Washington, D.C.
"Things of Science"


 The following excerpt is courtesy of Wikipedia.org: "Things of Science was an educational program launched by the nonprofit news syndicate Science Service in November 1940. The program consisted of a series of kits available by subscription and sent by mail monthly. The program continued until 1989.
Each month, thousands of subscribers received a small blue box about the size of a videocasette containing some material such as nylon thread or dinosaur bones. The box contained a yellow booklet explaining the topic for that month, along with the pieces and supplies needed to cover the topic. Some kits would teach about a specific topic, such as coal or optical illusions. Other kits would provide parts to build items such as a small spectrograph, telescope, or pinhole camera. In addition to the monthly subscription, some kits were available for individual purchase, such as a "soilless gardening" unit which provided seeds, plant food, and instructions in hydroponics.
The Things of Science Club was started by Watson Davis, editor-in-chief of Science Service, because editors served by the service often asked for samples of the things the syndicate wrote about. The initial focus of the program was newspaper editors, but it soon shifted to young people. By 1946 the Science Service estimated that half of its subscribers were school groups and science clubs, and the other half were individuals.[5] Membership in the club was limited to a few thousand because some of the "things", such as dinosaur bones, were hard to come by."
There were three slide rule computational units. Unite 123 in 1958, Unit 209 in 1958, and Unit 272 in 1963. These used off-the shelf slide rules. There was a unit offerred in See more at Rediscovering Things of Science website by George B. Moody.
Computation Experiments (4.48MB Pdf)
Science Services Slide Rule (1963)
Things Of Science Computation Unit 273
ISRM 14.04.21.01 		Science Services Things Of Science Computation Unit 273 Slide Rule
Slide Rule made in USA by Engineering Instruments
Front Scale: A [ B, CI, C ] D, K
Back Slide: Blank
Back: Blank
Mailer
Slide Rule and Scale Engineering


Slide Rule and Scale Engineering, CO. (1930-1950)
Laporte, Indiana, New Carlisle, Indiana and Mt. Olive, Illinois

Slide Rule & Scale Engineering CO. Inc - A US slide rule manufacturer was founded by George L. Lockhart in Laporte, Indiana in 1930, and later New Carlisle, Indiana. SR&SE made custom slide wood slide rules, such as the Concrete Quantity Calculator, as well as a standard Mannheim with A-B-C-D-K & L scales. Rules were manufactured using magnolia wood, finished white with an Ethyl-Cellulose base, then printed. A transparent lacquer coating was then applied to protect the printing. In 1945 a facility was built in Mt. Olive, Illinois. On February 14, 1947 the biggest fire in Mt. Olive history destroyed part of the factory. Production resumed in remaining buildings. On April 14, 1950 the company was declared bankrupt. Nicholas Muschong, a Vice president of Acu-rule, filed to do business in Illinois, and may have acquired the assets and copyrights. Similar in design and construction to Lawrence Engineering Services and Festus (Later Acu-Rule) Manufacturing. Other calculator models advertised in a 1940 flyer were Concrete Block and Mortar, Brick and Hollow Tile, Lumber, and Galvanized Sheet Steel Weight.


REF SR&SE Co - Concrete Quantity Calculator		 SR&SE - Concrete Quantity Calculator - 1940
Made in USA by SR&SE Co, Mt. Olive, IL, Designed by George L. Lockhart
Front Scale (extended)
Thickness [ Width, Length ] Cubic Yards
Back: Instructions


S556 SR&SE Co - Concrete Quantity Calculator
Full Size Flyer 7.77MB 		SR&SE - Concrete Quantity Calculator - 1940
Made in USA by Slide Rule & Scale Engineering Co., Laporte, IN
Front Scale (extended)
Thickness [ Width, Length ] Cubic Yards
Back: Instructions
back Adv: The Master Builders Company, Chicago, Illinois
Instructions 562KB


REF SR&SE Co - Concrete Quantity Calculator		 SR&SE - Concrete Quantity Calculator - c1944
Made in USA by Slide Rule & Scale Engineering Co., New Carlisle, IN
Front Scale (extended)
Thickness [ Width, Length ] Cubic Yards
Back: Instructions
back Adv: Consumers Company, Chicago, Illinois
Instructions


REF SR&SE Co - Brick And Tile Computing Slide Rule		 SR&SE - Brick And Tile Computing Slide Rule - copyright 1940
Made in USA by Slide Rule & Scale Engineering Co., New Carlisle, IN for W.H.Pipkorn.
Front Scale (extended)
A Sale (Units to Sq In.) [ B Scale (Height in Ft.), C Scale (Length in Ft.) ] D Scale (Total Number of Units)
Back: Reference Dimensions of Materials
Adv: W.H. Pipkorn Company, W. Bruce Street, Southern End of 16th Street Viaduct, Milwaukee, Wisconsin
Scan donated by David Rance, The Netherlands
Instructions

Gilbert Small, Waltham, Massachusetts


Photos of Gilbert and Christine Small

Gilbert Small (1885-1963) invented and manufactured The Small Calculator in 1917. Jonathan Small, his Grandson, writes: "The only tidbit I know about the Pocket Calculator is that my grandmother mentions in her diaries from the 1920s a number of occasions when she and my grandfather would spend an evening assembling calculators to fill orders. Gilbert Small was employed by an engineering firm by the name of Worcester with offices in Waltham and Boston." (Continued on right)

(Cont'd) "He was frequently required to make trips to Portland, ME, to inspect a bridge there (a bridge known as the 'Million Dollar Bridge', which has since been torn down). As a small child I knew my grandfather had invented the 'Small Pocket Calculator' because he had quite a few in stock in his home in Wayland, Massachusetts. His work was in the field of architecture for which he regularly commuted from Wayland (a suburb) to Boston by train. He was instrumental in designing the colonial style home (also in Wayland) where my parents brought up their family and lived well into their senior years, Sometimes my grandfather's work involved dismantling old historical New England homes. When this was the case he frequently salvaged and recycled useful building materials. In the case of my childhood home, this included massive exposed hand hewn beams in the living room. You could see the marks where someone had shaped the beams one axe blow after another. He also recuperated broad planks of red pine paneling and vintage bricks for that house. His architectural work prompted him to invent the 'Small Pocket Calculator'. He designed it in an era before wristwatches had come into vogue and it was common for men to carry a pocket watch. My grandfather wanted to make a calculator that would have the same small, round and convenient size and shape."



The Small Calculator (1917)
ISRM 14.06.12.01
 The Small Calculator
Made in USA by Gilbert Small, Waltham, Massachusetts
United Staes Patents 657,916 Sep 18, 1900 and 1,255,939, Feb 12, 1918
Radial Scale: ( C, D )
Circular Scale Face 1: 6in Linear scale, CI, S
Circular Scale Face 2: L, A (2 concentric scales), ST
Gift Of Gretchen S. Lebrun (Canada) and Jonathan Small, Grand Children Of Gilbert Small
Related US patents: (Additional Photos courtesy of Nathan Zeldes\, Israel)
US0657916 US1255939
Scale Description

The Spirule Co., Whittier, California

Spirule is the invention of the late Walter Richard Evans (1920-1999), who was a noted American control theorist and the inventor of the root locus method in 1948. He received his B.E. in Electrical Engineering from Washington University in St. Louis in 1941 and his M.E. in Electrical Engineering from the University of California, Los Angeles in 1951. Evans worked as an engineer at several companies, including General Electric, Rockwell International, and Ford Aeronautic Company. He was the recipient of the 1987 American Society of Mechanical Engineers Rufus Oldenburger Medal and the 1988 AACC's Richard E. Bellman Control Heritage Award electrical engineer who developed the "Root-Locus Method" for designing automatic control systems. He then invented the Spirule to help "nail down specific points on the locus - to establish the gain to use and the exact natural frequency and damping that will result". This device was manufactured by Evans's company in the 60's, and 100,000 of them were actually shipped before personal computers took over. He wrote "Control System Dynamics" 1954, published by McGraw Hill, 1954
In Memoriam, Orbit Magazine, 2000


The Spirule (1959)
ISRM 19.06.18.02

1959 Instructions (97MB PDF) 		The Spirule (copyright 1951)
Made in USA by The Spirule Co. ,Whittier, California. for North American Aviation
Construction: clear sheet plastic, and consists of a disc that can rotate on a pivot on a 30 cm long rectangular ruler. Both pieces are covered with graphs, scales and other markings. This version has a guide on a pivot. The Spirule was flat enough to ship in a mailing envelope with the instructions.
Circular disk: ( Slope, damping Ratio, Log, C scale )
Rectangular scales on face (D scale), S/2, 1/S, S, R, P, M, A-, A+
Scales on edges: 0-1.8 linear, 0-90 linear, 1-10 Logarithmic
Gift of Shirley Brooks of Jacksonvill, FL, Peter's widow.
Original Owner: Peter Brooks Morton (c.1938-2017). Peter graduated from the University of Akron with a BSEE in Electric Engineering, Medical Electronics. He received his Masters in Electrical Engineering, Computer Science from Polytechnic Institute of New York. He was Assistant Professor, Engineering Director of Rockland Community College from 1964-1984. and was Adjunct Professor at SUNY College at New Paltz, Mathematics and Computer Science Department 1984-1985. He also was Adjunct Professor at FIT's Manufacturing Management, Science/Math Dept. He retired in October 2006 from the Fashion Institute of Technology where from 1985 to June 2006 he worked as the Micro Computer System Specialist and late as Campuswide Network Manager. Hee had his own business, Dearniac Computer Services. He published several books including "Electronic Technicians Handbook: Power Supplies; Batteries" Theory & Problems in Electrical Technology, Schaum's College Outlines"; Technical and Instructional Manuals, E-Com Corporation.


The Spirule (1959)
ISRM 19.06.18.02
 The Spirule (1959)
Made in USA by The Spirule Co., Whittier, California. for North American Aviation
Construction: clear sheet plastic, and consists of a disc that can rotate on a pivot on a 30 cm long rectangular ruler. Both pieces are covered with graphs, scales and other markings. This version has a guide on a pivot. The Spirule was flat enough to ship in a mailing envelope with the instructions.
Circular disk: ( Slope, damping Ratio, Log, C scale )
Rectangular scales on face (D scale), S/2, 1/S, S, R, P, M, A-, A+
Scales on edges: 0-1.8 linear, 0-90 linear, 1-10 Logarithmic
Archive - Nathan Zeldes Collection, History of Computing


The Spirule (c1965)
ISRM 19.02.21.08

1965 Instructions 		The Spirule ( copyright 1951, 1965 version)
Made in USA by The Spirule Co. ,Whittier, California. for North American Aviation
Construction: clear sheet plastic, and consists of a disc that can rotate on a pivot on a 30 cm long rectangular ruler. Both pieces are covered with graphs, scales and other markings. This version has a guide on a pivot. The Spirule was flat enough to ship in a mailing envelope with the instructions.
Circular disk: ( Slope, damping Ratio, Log, C scale )
Rectangular scales on face (D scale), S/2, 1/S, S, R, P, M, A-, A+
Scales on edges: 0-1.8 linear, 0-90 linear, 1-10 Logarithmic
Gift of Gregory and Joy Playle, of Alexandria,Virginia
In this version: Plastic strip (Page 9, Item 1) no longer included to save costs, since it was seldom used.

T and T Electric Manufacturing (c1938)
975 So. Raymond Avenue, Pasadena 2, California, SYcamore 9-3424
Later: 933 S. Fair Oaks Avenue, Pasadena, California



TandT Electric FAST Calculator
ISRM 17.09.14.01 		TandT Electric FAST Calculator
Made in USA - Copyright 1938, Metal construction
Note: Address on manual: 975 So. Raymond Avenue, Pasadena 2, California
3 external disks, 1 internal disk
Designed by Frank A. Short, Los Angeles, California. Frank who was working at the Riverside Muninciple Plant, was Initiated into the Los Angeles Jovians in 1914. He was listed as living in South Pasadena, California. In 1944 he was part of the Industrial Accident Commission in Los Angeles.
Front Scale Wire Calculator: (wire size), % drop, Feet one way, (Amperes), System Index, Wire capacity table
Back Scales 220V Motors: (Slip-Ring, High Reactance, Squirell Cage), Horse-power, Conduit, Fuse, Load, Wire
Back Scales 440V Motors: (Slip-Ring, High Reactance, Squirell Cage), Horse-power,Conduit, Fuse, Load, Wire
Gift of Michelle Black of Morro Bay, California. Belonged to father, John Black.

 Instructions (0.35MB PDF)


TandT Electric FAST Calculator - Version 2
REF 		TandT Electric FAST Calculator - Version 2
Made in USA - Copyright 1938, Metal construction
Note: Address on front: 933 S. Fair Oaks Avenue, Pasadena, California
Added reference on calculator: "Motor data based on the National Electrical Code - 1937"
3 external disks, 1 internal disk
Designed by Frank A. Short, Los Angeles, California. Frank who was working at the Riverside Muninciple Plant, was Initiated into the Los Angeles Jovians in 1914. He was listed as living in South Pasadena, California. In 1944 he was part of the Industrial Accident Commission in Los Angeles.
Front Scale Wire Calculator: (wire size), % drop, Feet one way, (Amperes), System Index, Wire capacity table
Back Scales 220V Motors: (Slip-Ring, High Reactance, Squirell Cage), Horse-power, Conduit, Fuse, Load, Wire
Back Scales 440V Motors: (Slip-Ring, High Reactance, Squirell Cage), Horse-power,Conduit, Fuse, Load, Wire
Archive - Courtesy of Sphere Reasearch.


T & T Fast Calculator
ISRM 09.10.21.09		 T & T Fast Calculator
Made in USA - 5-5/8" x 7"
Front Scale - Wire Calculator: Wire Size (Amperes) System Index
Back Scale - Motor Calculator: Load (Fuse Sizes)
Donated by Marten C. Jensen
Instructions

Henry W. Tomlinson



REF Henry W. Tomlinson Winslow Strength Computing 		Henry W. Tomlinson Winslow Strength Computing
Made in USA - Copyright 1904 Metal construction
Designed by Benjamin E. Winslow, Structural Engineer
Front Scale (Wood Beams):
A1, A2 [ A3, A4 ][ A5, A6 ] A7, A8
B1, B2 [ B3 B4 ][ B5, B6 ] B7, B8
Back Scale (Steel Beams):
C8, C'7, C7 [C6, C5 ][ C4, C3 ] C2, C1
D8, D'7, D7 [D6, D5 ][ D4, D3 ] D2, D1
Archive - SR and Instructions scans provided by Peter Fox, UK
Instructions (1.81MB PDF)


REF Henry W. Tomlinson Winslow Strength Computing 		Henry W. Tomlinson Winslow Strength Computing
Made in USA - Copyright 1931 Fiberboard construction
Designed by Benjamin E. Winslow, Structural Engineer
Front Scale (Wood Beams):
A1, A2 [ A3, A4 ][ A5, A6 ] A7, A8
B1, B2 [ B3 B4 ][ B5, B6 ] B7, B8
Back Scale (Steel Beams):
C8, C'7, C7 [C6, C5 ][ C4, C3 ] C2, C1
D8, D'7, D7 [D6, D5 ][ D4, D3 ] D2, D1
Arcvhive - Scan provided by Peter Fox

Tru-Bilt



S156 Tru-Bilt 79CB		 Tru-Bilt 79CB
Made in USA - retail package
Front Scale
S, K, A [ B, CI, C ] D, L, T
Back blank

U.S. Blue



S309 U.S. Blue 1876		 US Blue 1876
Made in Japan by Hemmi for U.S. Blue Co., Chicago
Front Scale
A [ B, C ] D
Back Scale
[ S, L, T ]

F. Weber & Co., Philadelphia, Pennsylvania.


1923 Logo. 1920 Factory and Catalog. Slide rules begin on page 235. 		A successor company to Janentzky & Weber Manufacturers & Importers, F. Weber Co.was founded by the artist and businessman, Frederick W. Weber, Sr. (?-1919) in 1854, F. Weber Co. is the oldest and one of the largest manufacturers of art materials in the United States. The factory at 1220 Buttonwood St in Philadelphia, Pennsylvania manufactured artist paints and drawing materials. They also sold rebranded drawing instruments for draftsmen and engineers and slide rules (mostly from German and USA makers), along with school supplies. Following the death of Fredrick W. Weber Sr. in 1919, his two sons Fred William Weber, Jr. (1935-2003) and Ernest Weber had the company incorporated and renamed it F. Weber Co., Inc. Fred W. Weber served as Technical Director and was a successful artist, chemist, inventor, and businessman, he was responsible for much of the innovation in product development after taking over in 1919 to his retirement in 1967. The company was bought by Visual Art Industries of Brooklyn, NY in 1980, after the slide rule era. The modern company, Martin F. Weber Co. is also known for its artists signature kits designed for revered television artists such as Jon Gnagy, Bob Ross, Susan Schewe, Robert Wyland and Bruce Blitz.Reference: Wickipedia


REF Weber No. 5 Special
REF		 Weber No. 5 Special
Made in USA - Philadelphia
Front Scale
A [ B, CI, C ] D
Archive - Herman van Herwijnen Slide Rule Catalogue


Weber 4237 Mannheim
ISRM 20.04.01.358		 Weber 4237 Mannheim (4 in)
Made in Germany by Nestler for F.Weber
Front Scale
A [ B, C ] D
Back Scale: 11.5cm [ S, L, T ] 4.5in
Gift of Philip Stanley Collection


Weber 4280-A
S568		 Weber 4280-A - c1930
Made in USA - Same as Post 1457, Charvoz-Roos 109
Material: Wood stock with plastic laminate, plastic braces
Front Scale
T Cot, DF [ CF, CIF, CI, C ] D, S Cos, ST
Back Scale
Fraction-Decimal [ B, K, L, C ] Trig identities
Original Owner: E. Ewan, 1472 S0. 303 rd., Auburn, WA (on case)


Weber 4280-M_Mannheim-Trig 1945
ISRM 20.08.04.01		 Weber 4280-M_Mannheim-Trig - 1945
Made in USA by Acurule - Same as Post 1457, Charvoz-Roos 109
Material: Wood stock with plastic laminate. Metal braces
Front Scale
T Cot, DF [ CF, CIF, CI, C ] D, S Cos, ST
Back Scale
Fraction-Decimal [ B, K, L, C ] Trig identities
Note: Came with unbranded Acurule manual by Ross R. Middlemis


Weber 4281-S Students Slide Rule
S158		 Weber 4281-S - Students Slide Rule - c1930
Made in USA - Philadelphia
Front Scale
A [ B, C ] D, (Q+1, P+1 notation)
Back Scale: [S, L, T ]


Weber 4281-5 Mannheim Slide Rule
ISRM 20.08.06.01		 Weber 4281-5 - Mannheim Slide Rule - c1935
Made in USA by F,Weber Co. St.Louis, Philadelphia, Baltimore
Front Scale: A [ B, C ] D
Back Scale: [S, L, T ]
Back: Equivvalents Table


Weber 4285-A
20.08.17.01		 Weber 4285-A
Made in USA by Roos for F.Weber Same as Roos Co. SR-104
Front Scale: A [ B, CI, C ] D, K
Back Scale: [S, L, T ]
Sterling 587 cursor


Weber 4285-N (Rietz)
ISRM 20.08.16.01		 Weber 4285-N (Rietz)
Made in Germany by Nestler for F.Weber
Front Scale
K, A [ B, CI, C ] D, L
Back Scale: 29.5cm [S, S&T, T ] 11-5/8 inch
Multiple Hairlind Cursor


Weber 4285P Scola
REF		 Weber 4285P Scola
Made in USA by Acu-Rule for F.Weber
Front Scale
S, K, A [ B, CI, C ] D, L, T
Back Scale: Equivalents and Conversions Archive - Tom Dilatush Collection


Weber 4286 Pocket Mannheim with Magnifier Pre-WWII
ISRM 20.04.01.233		 Weber 4286 Pocket Mannheim with Magnifier pre-WWII
Made in Germany by Nestler for F.Weber
Front Scale
5in // A [ B, C ] D || 15cm
Back Scale: [ S, L, T ]
Back Scale: Equivalents and Conversions (UK English)
Gift of Philip Stanley Collection


Weber 4286-D
REF		 Weber 4286-D
Made in Denmark by Diwa for F.Weber
Front Scale
5in // K, A [ B, CI, C ] D, L
Back Scale: [ S, S&T, T ]
Ebay photo


Weber 4286P Pocket Mannheim (1954)
ISRM 20.04.01.134		 Weber 4286P Pocket Mannheim dc G5402 (Feb 1954)
Made in Germany (Western Zone) by Aristo for F.Weber
Front Scale
5in // A [ B, CI, C ] D, L
Back Scale: [ S, L, T ] 13cm
Back Scale: Equivalents and Conversions (UK English)
Gift of Philip Stanley Collection


Weber 4287 Pocket
REF		 Weber 4287 Pocket
Made in Germany by A. Nestler for F.Weber
Front Scale
A [ B, C ] D
Back scale: 11cm [S, S&T, T ] 4.5in
Archive - Scan provided by Mark D. Sutton


Weber 4287 Pocket Mannheim (post WWII)
ISRM 20.04.01.243		 Weber 4287 Pocket Mannheim (post WWII)
Made in Germany (Aristo or Nestler?) for F.Weber
Thin film cursor
Front Scale
5in // A [ B, CI, C ] D, L
Back Scale: [ S, L, T ] 13cm
Gift of Philip Stanley Collection


Weber 4288 Pickworth (Rietz)
ISRM 21.01.19.01		 Weber 4288 Pickworth (Rietz)
Made in Germany by A. Nestler for F.Weber (similar to Nestler 23R),. Riveted laminations.
Front Scale (extended)
10in // K, A [ B, CI, C ] D, L || 27.5 (Q+1, P-1)
Back scale: [S, S&T, T ]
Well: blank
Back: Equivalents (English), Slide Rule Data Slips, complied by. C.N.Pickworth, Wh.Sc.
Multi-lined Cursor


Weber 4288 Rietz
S417		 Weber 4288 Rietz
Made in Germany by A. Nestler for Weber (similar to Nestler 23R)
Front Scale (extended)
11in // K, A [ B, CI, C ] D, L || 1:25
Back scale: [S, S&T, T ]
Well: 55cm
Back: Equivalents (English), Albert Nestler
Multi-lined Cursor


Weber 4293
REF		 Weber 4293
Made in USA by Charvos-Roos (or Acu-Rule) - c1945
Front Scale
LL0, LL00, A [ B, K, CI, C ] S Cos, ST, T Cot,
Back Scale:
L, LL1, DF [ CF, CIF, CI, C ] D, LL3, LL2
Archive - Tom Dilatush Collection


Weber 42121 N
P229		 Weber 42121 N
Made in Germany by A. Nestler for Weber (similar to Nestler 021)
Front Scale (extended)
5in // P, K, A [ B, CI, C ] D, S, T
Back Scale
[ LL1, LL2, LL3 ]
Multi-lined cursor


Weber 42968 (Aristo Studio 968)
REF		 Weber 42968 (Aristo Studio 968 Version 1) c1960
Made in Germany by Aristo for Weber Co. Philadelphia, Pennsylvania.
Front Scale; (extended)
LL01, LL02, LL03, A [ B, L, K, C ] D, LL3, LL2, LL1
Back Scale
T Cot, ST ST, DF [ CF, CIF, CI, C ] D, P, S Cos
Multiple hairlines: PS, KW
Archive - Stephen Wilde Colllection

Whitehead & Hoag, Newark, New Jersey


Whitehead & Hoag Company (W&H), founded in 1892, made over 5,000 different advertising novelty item, mostly famous for buttons. During World War II, normal button production was shelved for a period of time at the factory. W&H then turned to the identification buttons which were worn by millions of workers in the war plants. At the peak of the war, W&H had over 400 employees making these buttons which were required to be worn by state and federal laws. Bastian Bros., of Rochester N.Y. (founded in 1895) was a long-time competitor of W&H and purchased W&H in 1959, and the factory was closed, scrapping all the tools and dies. Bastian continued to use W&H's name, finally phasing it out in 1964-65.

When determining if a thin film plastic slide rule is made by Graphic Calculator, Gerson, Parisian Novelty, Whitehead-Hoag (W&H), etc, look for the cursor stop that prevents the cursor from falling off. This was a W&H feature. However the C-Thru No. 27 and 88 also had this feature. W&H predates C-Thru, so thru may have purchased the W&H toolinjg from Bastion Bros.



Whitehead & Hoag (Heliopot) Pocket Slide Rule
ISRM 14.07.02.90		 Whitehead & Hoag (Heliopot) Pocket Slide Rule
Made in USA by Whitehead-Hoag, Newark, New Jersey
Manufactured and printed from thin plastic film. These are similar, in design, to slide rules branded by C-Thru, however the W&H design uses cursor stops.
Dimensions: 6-1/2 x 1-1/4 inches
Front Scale
A [ B, CI, C ] D
Back Scale
[ Temp Conversion table ]
Gift of Ed Millis, Dallas, Texas



Instructions
Whitehead & Hoag Generic Slide Rule Version 1
ISRM 12.09.26.59		 Whitehead & Hoag Generic Slide Rule Version 1
Made in USA by Whitehead & Hoag Newark, New Jersey
Front Scale
A [6in, B, CI, C, 15.3cm] D
Well: Equivalents
Back Slide (Fil over to use): [S, L, T ]
Donated by the Huang Collection


General Electric Cable Calculator
P152 		General Electric Cable Calculator
Made in USA
Front Scale
A, [ B, C ] D, E
Back Scale: Wire Current Capacities
Back adv: Wire Gage Working Table


Whitehead & Hoag Generic Slide Rule Version 2
ISRM 12.09.26.60 		Whitehead & Hoag Generic Slide Rule Version 2
Made in USA by Whitehead & Hoag, Newark, NJ. for AMECO Community Television Systems
Front Scale
A [6in, B, CI, C, 15.3cm] D
Well: Equivalents
Back: Conversions: dB to microVolts, TV Channel to Frequency (megacycles)
Back adv: AMECO, Phoenix, Arizona (Community Television Systems)
Donated by the Huang Collection
The collector, who prefers to remain anonymous, obtained a B.S. degree in Physics from Taiwan's National Tsing Hua University in 1971. His love for computation has encouraged him to build a collection of slide rules, HP and TI calculators, as well as abaci, many displayed at ISRM.


Aeronav Inst. Private Pilots Flight Computer Model-I
ISRM 14.07.02.29 		Aeronav Instruments Private Pilots Flight Computer Model-I
Made in the United States, in New York by Whitehead & Hoag, Newark, New Jersey
Front Scale:
True Air Speed [ Indicated Air Speed, Pressure Altitude ] Air Temp ( Distance, Time Min, Hrs)
Back Scale:
Sectional Chart Scale, Ground Speed (Wind Correction Angle, Drift, True Heading )
Gift of Ed Millis, Dallas, Texas.


Whitehead-Hoag Wagner Net Price Calculator
MIT 2004.010.0171		 Whitehead-Hoag Wagner Net Price Calculator
Made in USA by Whitehead & Hoag Newark, New Jersey
Front Scale
List price (%, Net Price)
Back: Instructions on combining discounts
back Promo: Wagner Electric Manufacturing Co., St. Louis, MO.
Archive - MIT Collection


Whitehead-Hoag Simplex Wiring Computer 1905
MIT 2004.010.0169		 Whitehead-Hoag Simplex Wiring Computer 1905
Made in USA by Whitehead & Hoag Newark, New Jersey
Front Scale
List price (%, Net Price)
Back: Instructions on combining discounts
back Promo: The Simplex Electrical Co., 201 Devonshire St. Boston, Mass.
Archive - MIT Collection


Whitehead-Hoag Journal Low Pressure Gas Flow Computer
ISRM 18.03.20.10		 Whitehead-Hoag Journal Low Pressure Gas Flow Computer 1935
Made in USA by Whitehead & Hoag Newark, New Jersey for American Gas Journal, Dallas Texas
Note: This is a 7" x 8" blue hardbound folder with instructions on the left and a pocket on the right.
Front Scale
Cubic feet of Gas per Hour (Diameter of Pipe-inches) Section Scale
Belonged to Robert N. Curry. Gifted by his friend Alice Bowling of Louisville, Kentucky.
Robert N. Curry was a 1949 graduate of Western Kentucky University. Bob was the head of Measurement for Texas Gas Transmission Corp and authored a book on Natural Gas processing Fundementals of Natural Gas Conditioning. He was former chairman of the AGA Transmission Measurement Committee. Several of his slide rules are currently in the ISRM galleries.


Whitehead-Hoag Journal High Pressure Gas Flow Computer
ISRM 18.03.20.11		 Whitehead-Hoag Journal High Pressure Gas Flow Computer 1935
Made in USA by Whitehead & Hoag Newark, New Jersey for American Gas Journal, Dallas Texas
Note: This is a 7" x 8" red hardbound folder with instructions on the left and a pocket on the right.
Front Scale
Cubic feet of Gas per Hour (Diameter of Pipe-inches) Section Scale
Belonged to Robert N. Curry. Gifted by his friend Alice Bowling of Louisville, Kentucky.

Misc OEM - Promotional Rules



Honeywell Metric Conveter
ISRM 12.04.25.03		 Honeywell Metric Conveter
Made in Italy (stamped on sleeve)
Front Scale
PSI to KG/cm2. LBS to KG, FT3 to M3. BTU to K-CAL
Inches to CM, Feet to Metres, US Gal to Litres, Farenheit to Centigrade
Sleeve adv: Honeywell 'First in Control', Worldwide
Donated By Zdenka Novosad, Louisville, Colorado
Zdenka used this slide rule during her career as a petroleum engineer. She attended high school and graduated with a masters degree in Czechoslovakia. She received a PhD. from the University of Pennsylvania (1975) and later became a Petroleum Engineer for Shell Canada Limited and was a member of the Society of Petroleum Engineers. One of her many papers, published in 1996 by the journal 'SPE Reservoir Engineering', was Composition and Phase Changes in Testing and Producing Retrograde Gas Wells and she wrote Spectroscopic and Magnetic Resonance Studies of Aromatic Molecules published by the Graduate School of Arts and Sciences, University of Pennsylvania, 1975.


Atlas 51
P126		 Atlas 51
Made in Japan
Front Scale
A, [ B, CI, C ] D, K
Back Scale: [ S, L, T ]
Sleeve adv: Tower Const. Co. Sioux City, Iowa


Atlas-Copco Fluidics
P067		 Atlas-Copco Fluidics - Closed simplex
Made in Sweden - Text in Spanish
Front Scale
ΔP1,  ΔP [ d, P, L  ] Q, Q1
Back Scale
[d, P1, L1 ]
Original owner: UNK/Peru


P117 Dupa 012b General Electric
 		Dupa 012b General Electric
Made in Germany by Aristo
Front Scale
F, A, [ B, CI, C ] D, E
Back Scale: Blank
Back adv: General Electric
Original Owner: R.M. Hull


P187 Fawick Airflex
 		Fawick Airflex
Made in Japan for U.S. Company
Front Scale
A, [ B, CI, C ] D, K
Back Scale: [ S, L, T ]
Back adv: Fawick Airflex Industrial Clutches and Brakes


P213 Globemaster 62200 		Globemaster 62200
Made in Japan for Globemaster
Front Scale
A, [ B, CI, C ] D, K
Back Scale: Blank
Sleeve adv: Globemaster 5" Plastic Slide Rule


P144 Johnston Bros		 Johnston Bros - Simplex
Made in USA - Probably by Sterling
Front Scale
A [ B, CI, C ] D, K
Back Adv: Johnston Bros, Ferrysburg, Michigan


ISRM RCA 551		 RCA 551
Made in Japan for RCA
Front Scale
K, A [ B, S, T, C ] D, DI
Back Scale
DF [ CF, CI, C ] D, L
Donated by David Hecht, Alexandria, VA


P181 RCA 551		 RCA 551 - Duplex
Made in Japan for RCA
Front Scale
K, A [ B, S, T, C ] D, DI
Back Scale
DF [ CF, CI, C ] D, L


P166 SKF [ Early Hemmi 74 Variant ]		 SKF [ Early Hemmi 74 Variant ]
Made in Japan by Hemmi for SKF Ball Bearings
Front Scale (Extended)
14cm // K, A [ B, CI, C ] D, L 
Back Scale
[ S, S&T, T ]
Back Adv: SKF


P145 Swinston - Mesta		 Swinston - Mesta
Made in Germany for Swinston, Pittsburgh, PA, USA
Front Scale [Extended]
5in // K, A [ B, C ] D
Back Scale: Blank
Back Adv: Mesta Machine Co., Pittsburgh, PA
Copyright © 2003-2020 International Slide Rule Museum