General Information

Serial #

2755

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

WOOD BASE & KNOBS/ BRASS END FRAMES, CYLINDER ENDS/ COATED PAPER CYLINDER & SCALES/ 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

N/A

Width

N/A

Height

N/A

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

Unknown

Context

Country

Canada

State/Province

Manitoba

Period

CIRCA 1910+

Canada

AMERICAN MADE SLIDE RULE APPARENTLY USED AT ST. ANDREW'S LOCK & DAM, LOCKPORT, MANITOBA

Function

MECHANICAL ANALOGUE COMPUTING DEVICE USED FOR PEFORMING RAPID CALCULATIONS.

Technical

CYLINDRICAL SLIDE RULES BECAME POPULAR AT END OF 19TH CENTURY. THACHER'S RULE HAD SCALES 40 TIMES AS GREAT AS ON ORDINARY RULE, THUS GIVING READINGS ACCURATE TO FOUR FIGURES. IT WAS DEVELOPED BY CIVIL ENGINEER E. THACHER (1839-1922) OF PITTSBURG, WHO PATENTED IT IN 1881. AFTER 1887 THEYWERE PRODUCED BY KEUFFFEL & ESSER.

Area Notes

Unknown

Details

Markings

INCISED MFR.'S LOGO & LETTERING READING "4012/ 2755" ON BASE/ BLACK LETTERING ENCIRCLING CYLINDER END READS "Patented by Edwin Thatcher [SIC] C.E. Nov. 1st 1881 Divided by W.F. Stanley London 1882 Made by Keussel & Esser Co., New York"/ BLACK LETTERING ON INSTRUCTION SHEET ON BASE READS "THACHER'S CALCULATING INSTRUMENT"/ BLACK LETTERING & MARKINGS ON SCALES/ WHITE SYNTHETIC PLATE INSIDE BOX LID READS "KEUFFEL & ESSER CO./ NEW YORK/ ST. LOUIS CHICAGO/ SAN FRANCISCO"

Missing

SLIDE RULE IS COMPLETE/ CASE MISSING ONE HOOK & EYE CLASP

Finish

CLEAR COATED BROWN WOOD BASE & BOX/ CLEAR COATED? BRASS/ OFF-WHITE CYLINDER & SCALES/ CLEAR COATED NATURAL KNOBS

Decoration

LOGO CONSISTING OF WINGED LION & WORD "TRADE MARK" INCISED ON BASE