Controller Calculating Machine Components

Controller Calculating Machine Components

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These objects were collected by Brooklyn high school teacher and historian of mathematics L. Leland Locke. They are five banks for an adding machine. The metal frame of each bank contains nine 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. The key stems are held in place with a string.
Compare to 1983.3003.08 and 1983.30033.09. See also 311948.
Currently not on view
Object Name
calculating machine components
Controller Company
place made
United States: New York, New York City
Physical Description
plastic (overall material)
metal (overall material)
overall: 7 cm x 2.5 cm x 20 cm; 2 3/4 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
Calculating Machines
Science & Mathematics
Data Source
National Museum of American History
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