TIM Calculating Machine

Description
This heavy, stepped drum, full-keyboard electric calculating machine has a metal frame painted black and green, and eight columns of black and white plastic numeral keys. The carriage is in back of the machine, with nine revolution counter wheels and sixteen result wheels. Both the revolution counter and the result register have sliding decimal markers. Digits can be set in the revolution register using thumbscrews. A bell rings when the result passes through 0.
The machine sits on a metal stand, also painted black, which holds the machine above and the motor below. The nine silver-colored metal digit keys below the keyboard toward the front of the stand are numbered from left to right. The crank for operating the machine manually is to the right of the keyboard. Left of the keyboard is a lever that can be set for addition/multiplication or subtraction/division. The cord is on the right front of the machine.
A mark on the carriage reads: Ludwig Spitz & Co. (/) G.m.b.H. (/) T I M (/) TIME IS MONEY (/) TRADE MARK. A small metal tag attached below the row of metal keys at the front of the machine reads: 860. The machine is stamped on the left side underneath the carriage: 12571.
The Berlin maker Ludvig Spitz began his business offering sturdy, manually operated, stepped drum calculating machines. After World War I, he introduced key-set machines like this one. The example comes from the collections of Felt & Tarrant Manufacturing Company.
Reference:
E. Martin, The Calculating Machines (die Rechenmaschinen), trans. P. A. Kidwell and M. R. Williams, Cambridge: MIT Press, 1992, pp. 191–194.
Location
Currently not on view
Object Name
calculating machine
date made
1920s
maker
Ludwig Spitz & Co.
Physical Description
cloth (overall material)
plastic (overall material)
metal (overall material)
Measurements
overall: 40.5 cm x 58 cm x 32 cm; 15 15/16 in x 22 27/32 in x 12 19/32 in
place made
Deutschland: Berlin, Berlin
ID Number
MA*323587
accession number
250163
maker number
860
catalog number
323587
subject
Mathematics
Science & Mathematics
Calculating Machines
See more items in
Medicine and Science: Mathematics
Calculating Machines
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of Victor Comptometer Corporation
Additional Media

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