TIM Calculating Machine
date: label: date made
content: 1920s
name: label: maker
content: Ludwig Spitz & Co.
notes: label: Description
content: 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.
label: Description
content: 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.
label: Description
content: 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.
label: Description
content: 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.
label: Description
content: Reference:
label: Description
content: E. Martin, <I>The Calculating Machines (die Rechenmaschinen)</I>, trans. P. A. Kidwell and M. R. Williams, Cambridge: MIT Press, 1992, pp. 191–194.
label: Location
content: Currently not on view
place: label: place made
content: Germany: Berlin, Berlin
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Calculating Machines
label: See more items in
content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of Victor Comptometer Corporation
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.323587
label: accession number
content: 250163
label: maker number
content: 860
label: catalog number
content: 323587
objectType: label: Object Name
content: calculating machine
physicalDescription: label: Physical Description
content: cloth (overall material)
label: Physical Description
content: plastic (overall material)
label: Physical Description
content: metal (overall material)
label: Measurements
content: overall: 40.5 cm x 58 cm x 32 cm; 15 15/16 in x 22 27/32 in x 12 19/32 in