Controller Calculating Machine Component

Controller Calculating Machine Component

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This object was collected by Brooklyn high school teacher and historian of mathematics L. Leland Locke and held by the Museums of the Peaceful Arts in New York City before coming to the Smithsonian. The metal frame of this object contains seven key stems with white plastic keys, a numeral wheel at the top of the keys, and related mechanisms. The metal strip below the keys is painted green. Key stems tied in place with string. Compare to 1983.3003.09, 1983.3003.40, and 311948.
Currently not on view
Object Name
calculating machine component
Controller Company
place made
United States: New York, New York City
Physical Description
plastic (overall material)
metal (overall material)
overall: 7.8 cm x 2.5 cm x 20 cm; 3 1/16 in x 31/32 in x 7 7/8 in
ID Number
nonaccession number
catalog number
Credit Line
Gift of L. Leland Locke
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Calculating Machines
Data Source
National Museum of American History
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