General Information

Serial #

380008

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

CELLULOID SCALES ON MAHOGANY BASE/ METAL HARDWARE/ LEATHER & PAPER COVERED CARDBOARD CASE

Dimensions

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

Length

52.5 cm

Width

5.8 cm

Height

3.6 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

Ontario

Period

Unknown

Canada

EXAMPLE OF EQUIPMENT USED AT LARGEST RESEARCH INSTITUTION IN CANADA DURING PERIOD OF ITS MOST RAPID GROWTH, GREATEST PRODUCTIVITY & DURING WHICH IT DEVELOPED WORLD RENOWNED REPUTATION.

Function

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

EXAMPLE OF POLYPHASE SLIDE RULE OF 1920S TO 1930S MADE BY MAJOR AMERICAN SLIDE RULE MFR. SLIDE RULES SUCH AS THIS WERE MUCH USED BY SCIENTISTS, ENGINEERS, ETC. UNTIL MADE OBSOLETE BY ELECTRONIC CALCULATORS.

Area Notes

Unknown

Details

Markings

RED LETTERING ON SCALES READS "PAT. JUNE 5, 1900", "KEUFFEL & ESSER CO. N.Y.", "MADE IN U.S.A.", "N4053-5"/ BLACK LETTERING READS "380008" & "K&E CO. N.Y./ PAT. 8.17.1915"/ BLACK, RED, & BLUE MARKINGS & NUMBERING FOR SCALES

Missing

COMPLETE

Finish

WHITE SCALES/ COLOURLESS & TRANSPARENT CURSOR/ CLEAR COATED BROWN WOOD/ BLACK CASE

Decoration

N/A