Demonstration Slide Rules
Used for Teaching Classes

These are enlarged versions of popular slide rule models that the manufacturers produced and provided to schools to aid in teaching the use of slide rules. They were excellent advertising tools for promoting the sales of the brand.

Note: Images included here were photographed, scanned from catalogs, submitted by collectors, or found on the web to document all the varieties that exist. My apologies if pictures are not properly credited. Let me know so I can better document everything.

Aristo/Faber Castell Schul-Rechenschieber

Shown are Aristo Junio, Aristo Bi-scholar,
Unknown, and Faber Castell 52/80

Pictures courtesy of Segeo.de
(Stephan Georgi) - Hamburg, Germany


Courtesy of W. Girbardt University of Grifswald (Germany)
This picture is from a 1954 Aristo (German) catalog.

This 120cmx40cm Aristo Tri-Log is from the
Tweed Library Archive (UK).

Aristo TriLog 308 Courtesy of Prof. Dr. Jörn Lütjens
Rechenschieber-Online-Museum (Ahrensburg, Germany)

Dietzgen

Keuffel & Esser

K&E demonstration slide rules, with Mannheim scales, date back as early as 1930, when they appeared in the 1933 K&E catalogs as Model 100 and 101. (contributed by Clark McCoy). the slide rules were typically made of Redwood, which is lighter in weight than many other woods.

The 1936 catalog, although listing just the Model 100 and 101, has a note at the bottom of the page stating Demonstration slide rules, with the scales of the K&E Log Log Trig (equivalent to the 4080) and Log Log Decitrig Slide Rules (equivalent to the 4081), are also available.

The 1962 catalog, calls the 4053 Model 100 now as 69-1944, the 4081 Log Log Decitrig Slide Rules as 68-1923, and a new Demonstration Slide Rule for the Decilon 68-1100, called Model 68-1929 is now available.


1933 K&E Catalog
1936 K&E Catalog
1962 K&E Catalog
1967 K&E Catalog

Model 100, 68-1944 - Mannheim Type , 7ft 1/2in long

The model 100 was equivalent to a 4053-3, with scales A, B, CI, C, D, K, S, L and T. By 1962 it was called Model 68-1944.

Model 101 - Polyphase Duplex, 7ft 10-3/4in long

The model 101 was equivalent to a 4070-3, with scales DF, CF, CIF, A, B, CI, C, D, K, S, L and T. It was not mentioned in the 1962 catalog

Model 68-1923 - Log Log Duplex Trig, 8ft

The model 68-1923 was equivalent to a 4081, with front scales: LL02, LL03, DF, CF, CIF, CI, C, D, LL3, LLL2. Back scales: LL01, L, K, A, B, T, SRT, S, D, DI, LL1.

Mike Konshak collection www.SlideRuleMuseum.com

North Carolina State University School of Mathematics
John Wesley Cell, NSCU, 1960

Model 68-1929 - Decilon, 6ft long

This model was equivalent to the Decilon 68-1100/68-1130, with front scales: Sq1, Sq2, DF, CF, CIF, L, CI, C, D, Ln0, Ln1, Ln2, Ln3. Back scales: Ln-3, Ln-2, Ln-1, Ln-0, A, B, T, SRT, S, C, D, DI, K.

Scans courtesy of Clark McCoys K&E Catalogs




Pictures courtesy of Sphere Research

Pickett Trainers

Pickett 4ft and 7ft slide rules are the most abundant and varied that one can find. They were made of plywood with sheet aluminum bars holding the stock together. Pickett gave one to every school that ordered 24 standard size slide rules, consequently doing a great job of placing free advertising in every school in America.

From the Pickett Wall Mount Teaching Guide by Maurice Hartung
Down load the 48 page teacher's guide
Pickett Teaching Guide (17.7MB)

Model 2 (circa 1945) - 7 ft


Dagmar's class photos by Craig Kielhofer ISRG

Model 500-ES - 4 ft


Mike Konshak collection www.SlideRuleMuseum.com

Model N803-ES Speed Rule - 7ft

Model 902-ES Trig - 4ft

Model 1010-ES - 7 ft




Donated to www.SlideRuleMuseum.com by Tom Grosh (on right), now located at the Computer History Museum. Notice another Pickett Trainer, a 4ft 500-ES reflected in the mirror with hoards of slide rules in the lower right corner.

Model N4-ES - 7ft


Courtesy of Ken, CEO, Acorn Product Development
This is mounted in their office in Fremont, CA

Post/Hemmi

Model 1447D - Student, 4ft

The model 68-1923 was equivalent to a 1447, with front scales: A, B, CI, C, D. On the back was S, L, T.


Courtesy of Paul Ross The Slide Rule Trading Co

Model 1447DA - Student, 6ft

The model 1447DA was equivalent to a 1447, with front scales: A, B, CI, C, D. On the back was S, L, T.


Courtesy of Paul Ross The Slide Rule Trading Co

Hemmi Model 260 - 5ft

Collector Amedeo Muscelli, found this  in a local Venezuelan shop. The 5 foot overall Hemmi 260 slide rule is made of wood and painted with an air brush using a template. The cursor is a one sided frame with a wire in the middle, this frame work hooked onto the top of the rule and had to be re-hung when the rule was reversed.

Pictures courtesy of Sphere Research

Welch

Welch - 4ft

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