Adding Machine Section, Comptometer Model C


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.

Date Made: ca 1910

Maker: Felt & Tarrant Manufacturing Company

Location: Currently not on view

Place Made: United States: Illinois, Chicago

Subject: Mathematics


See more items in: Medicine and Science: Mathematics, Adding Machines, Science & Mathematics


Exhibition Location:

Credit Line: Gift of Felt & Tarrant Manufacturing Company

Data Source: National Museum of American History

Id Number: MA.273177Catalog Number: 273177Accession Number: 54382

Object Name: adding machine section

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


Record Id: nmah_690459

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