Adding Machine Section, Comptometer Model C

Description
This adding machine section has a glass case with a wooden base that holds a steel mechanism for two columns of white keys. The keys are covered with white plastic key tops that have both digits and complements of digits. The keys are alternately concave (odd digits) and flat (even digits). There are three decimal markers and two subtraction levers. Three number wheels are at the front, and a zeroing crank is on the right.
Felt & Tarrant Manufacturing Company began manufacturing the Model C Regular Comptometer in 1909 and the Model C Light Comptometer in 1911. It gave this section to the Smithsonian in 1912.
Location
Currently not on view
Object Name
adding machine section
date made
ca 1910
maker
Felt & Tarrant Manufacturing Company
Physical Description
steel (overall material)
glass (overall material)
wood (overall material)
plastic (overall material)
Measurements
overall: 17.5 cm x 16 cm x 42.2 cm; 6 7/8 in x 6 5/16 in x 16 5/8 in
place made
United States: Illinois, Chicago
ID Number
MA*273177
catalog number
273177
accession number
54382
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
Credit Line
Gift of Felt & Tarrant Manufacturing Company
Additional Media

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