Torpedo Adding Machine

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Description
This German key-driven adding machine has a black plastic case and eight columns of steel keys covered with black and white plastic key covers. The columns run from 1 to 5 (not from 1 to 9). Keys for odd digits are deep, and those for even digits relatively shallow. The metal zeroing bar is on the left, and nine windows in the front show the result. Decimal places are marked along the windows. There machine has no provision for subtraction. The bottom has black felt pads. The serial number marked on the bottom of the machine is 005105.
This example comes from the collection of Felt & Tarrant Manufacturing Company.
Reference:
E. Martin, Die Rechenmaschinen und ihre Entwicklungsgeschichte, [1925 edition with later supplement], p. 457. This source says the machine was introduced in 1931.
Location
Currently not on view
date made
1935
maker
Torpedo-Werke A.G.
place made
Deutschland: Hessen, Frankfurt
Physical Description
steel (overall material)
felt (overall material)
plastic (overall material)
Measurements
overall: 10.5 cm x 20 cm x 15 cm; 4 1/8 in x 7 7/8 in x 5 29/32 in
ID Number
MA.323613
accession number
250163
catalog number
323613
Credit Line
Gift of Victor Comptometer Corporation
subject
Mathematics
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Adding Machines
Data Source
National Museum of American History, Kenneth E. Behring Center

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