General Information

Serial #

699817

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

CELLOLOID SCALES ON WOOD BASE/ FERROUS METAL LEGS/ SYNTHETIC? COVERED WOOD BOX WITH METAL HARDWARE

Dimensions

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

Length

56.4 cm

Width

10.2 cm

Height

8.0 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

Ontario

Period

Unknown

Canada

EXAMPLE OF EQUIPMENT USED AT LARGEST RESEARCH INSTITUTION IN CANADA DURING PERIODOF ITS MOST RAPID GROWTH, GREATEST PRODUCTIVITY & DURING WHICH IT DEVELOPED WORLD RENOWNED REPUTATION. THIS EXAMPLE CAME FROM OFFICE OF DR. COOK, FORMER DIRECTOR OF NRC.

Function

MECHANICAL ANALOG COMPUTING DEVICE USED FOR SUCH CALCULATIONS AS MULTIPLICATION, DIVISION, PROPORTION, & PERCENTAGES.

Technical

EXAMPLE OF SIMPLIFIED SLIDE RULE, PROBABLY OF 1940S TO 1950S, MADE BY MAJOR AMERICAN SLIDE RULE MFR. IT WAS INTENDED FOR USE BY MERCHANTS & OTHER USERS WHO WERE NOT ENGINEERS OR SCIENTISTS & DID NOT REQUIRE ADVANCED TRIGONOMETRIC CAPABILITIES OF ENGINEERING/SCIENTIFIC SLIDE RULES.

Area Notes

Unknown

Details

Markings

INCISED RED LETTERING ON SCALES READS "KEUFFEL & ESSER CO., "PAT. 1,934,232", "MADE IN U.S.A.", "N-4096"/ BLACK LETTERING READS "699817", "PATENT 2,086,502"/ BLACK & RED SCALE MARKINGS & NUMBERING

Missing

COMPLETE

Finish

WHITE CELLULOID/ BROWN WOOD WITH CLEAR COATING/ BLACK WRINKLE FINISH ON LEGS/ BLACK WRINKLE BOX COVERING

Decoration

N/A