General Information

Serial #

87877

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

METAL CASING & WORKING PARTS (BRASS & STEEL)/ RUBBER FEET/ SYNTHETIC HANDLE GRIP/ SYNTHETIC COVER

Dimensions

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

Length

29.5 cm

Width

15.5 cm

Height

11.7 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

ODHNER

Country

Sweden

State/Province

Unknown

City

Gothenburg

Context

Country

Canada

State/Province

Ontario

Period

1935-1960S

Canada

CALCULATOR WAS PURCHASED IN 1936 BY DR. FRANK HOGG, WHO WAS THEN ASTRONOMER AT NEWLY OPENED DAVID DUNLOP OBSEVATORY. HE & HIS WIFE, NOTED ASTRONOMER DR. HELEN HOGG, USED IT FOR ASTRONOMICAL RESEARCH PURPOSES UNTIL MID 1960S WHEN IT WAS REPLACED BY ELECTRONIC CALCULATORS.

Function

MECHANICAL CALCULATING DEVICE USED TO PERFORM ADDITION, SUBTRACTION, MULTIPLICATION, & DIVISION.

Technical

FIRST TRUE VARIABLE-TOOTHED GEAR CALCULATOR WAS INVENTED CA. 1874 BY SWEDE W.T. ODHNER IN ST. PETERSBURG & BALDWIN IN U.S., & SOON CAME TO DOMINATE MARKET. IT PROVIDED GREATER RELIABILITY & EASE OF USE, & USED SMALLER MECHANICAL COMPONENTS, RADICALLY DECREASING ITS SIZE & WEIGHT & SO MAKING IT MORE SUITABLE FOR OFFICE USE.

Area Notes

Unknown

Details

Markings

EMBOSSED GOLD LETTERING ON TOP & FRONT READS 'AKTIEBOLAGET/ ORIGINAL-ODHNER/ GOTEBORG' & 'MADE IN SWEDEN' RESPECTIVELY/ INCISED GOLD 'NO. 87877' ON BACK/ GOLD & RED DECAL ON BACK READS 'SOLD & SERVICED BY 'M.P. HOFSTETTER/ TORONTO, ONTARIO'/ GOLD PAINTED REGISTER NUMBERS ETC./ GREEN 'ORIGINAL-ODHNER' ON COVER

Missing

APPEARS COMPLETE

Finish

BLACK ENAMEL PAINTED CASING/ PLATED PARTS/ BLACK FEET/ BROWN HANDLE GRIP/ BLACK COVER

Decoration

N/A