Comptometer Model C, Light

Description
This full-keyboard non-printing adding machine has a gray-brown metal case and sits on a rectangular wooden base. There are eight columns of black and white color-coded plastic keys, with complementary numbers indicated on the keys. Keys for odd digits are concave, and those for even digits are flat. At the front of the machine are eight subtraction levers and eight decimal markers, as well as nine windows that reveal the totals shown on numeral wheels below. The zeroing handle is on the side.
The machine is marked on the left front with serial number: 47412. A metal tag behind the keys has several patent dates, the most recent being: SEP. 19. 11.
Location
Currently not on view
date made
1912
maker
Felt & Tarrant Manufacturing Company
place made
United States: Illinois, Chicago
Physical Description
metal (overall material)
wood (overall material)
plastic (overall material)
Measurements
overall: 17 cm x 25 cm x 38.8 cm; 6 11/16 in x 9 27/32 in x 15 9/32 in
ID Number
MA.273037
accession number
54245
maker number
47413
catalog number
273037
Credit Line
Gift of Felt & Tarrant Manufacturing Company
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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