General Information

Serial #

147178

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

CELLULOID COVERED WOOD CORE WITH METAL END PIECES/ LEATHER CASE WITH FABRIC LINING, cellulose nitrate

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

57.3 cm

Width

7.1 cm

Height

2.6 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Mathematics

Category

Calculating devices

Sub-Category

N/A

Manufacturer

AKA

Keuffel Esser

Country

United States of America

State/Province

New York

City

New York

Context

Country

Canada

State/Province

Quebec

Period

1940'S-1970'S

Canada

AN EXAMPLE OF ASLIDE RULE USED BY CANADIAN STUDENTS & PROFESSIONALS. THIS RULE BELONGED TO THE DONOR'S FATHER, DR. ORVILLE J. DENSTEDT, WHO OBTAINED HIS PHD IN BIOCHEMISTRY AT MCGILL UNIVERSITY IN THE 1940'S & SUBSEQUENTLY TAUGHT THAT SUBJECT THERE.

Function

A MECHANICAL ANALOG COMPUTING DEVICE USED FOR RAPID CALCULATIONS SUCH AS MULTIPLICATION, DIVISION, SQUARES & SQUARE ROOTS, CUBES & CUBE ROOTS, PROPORTIONS, SINES, COSINES, TANGENTS, SECANTS, COSECANTS ETC.

Technical

AN EXAMPLE OF A POLYPHASE DUPLEX SLIDE RULE OF THE 1940'S. THE DONOR'S FATHER PURCHASED IT DURING THE 1940'S WHILE A UNIVERSITY SCIENCE STUDENT & USED IT UNTIL HE PURCHASED A CALCULATOR IN THE 1970'S. SLIDE RULES SUCH AS THIS WERE MUCH USED BY SCIENTISTS, ENGINEERS, ETC. UNTIL MADE OBSOLETE BY ELECTRONIC CALCULATORS.

Area Notes

Unknown

Details

Markings

INCISED BLACK LETTERING ON DIFFERENT PARTS OF SLIDE RULE READ 'KEUFFEL & ESSER CO. N.Y.', 'PAT. JUNE 5, '08 DEC. 22 '08', 'MADE IN U.S.A.', 'N4088-5', '147178', 'KEUFFEL & ESSER CO.', 'PATENT 2,086,502'/ BLACK & RED SCALES & NUMBERING

Missing

N/A

Finish

BUFF SLIDE RULE WITH PLATED PARTS, COLOURLESS TRANSPARENT CURSOR/ BROWN LEATHER

Decoration

N/A