Torpedo Adding Machine

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
Object Name
adding machine
date made
1935
maker
Torpedo-Werke A.G.
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
place made
Deutschland: Hessen, Frankfurt
ID Number
MA*323613
accession number
250163
catalog number
323613
subject
Mathematics
Science & Mathematics
Adding Machines
See more items in
Medicine and Science: Mathematics
Adding Machines
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of Victor Comptometer Corporation
Additional Media

Visitor Comments

Add a comment about this object

**Please read before submitting the form**

Have a comment or question about this object to share with the community? Please use the form below. Selected comments will appear on this page and may receive a museum response (but we can't promise). Please note that we generally cannot answer questions about the history, rarity, or value of your personal artifacts.

Have a question about anything else, or would you prefer a personal response? Please visit our FAQ or contact page.

Personal information will not be shared or result in unsolicited e-mail. See our privacy policy.

Image CAPTCHA
Enter the characters shown in the image.