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Calculating Machine Component, Pinwheels

Calculating Machine Component, Pinwheels

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These objects were 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 component include twenty brass discs and portions of discs, as well as thirteen steel discs. All are on one shaft. At least one steel disc is numbered: 12. A loose piece is with the object.
Currently not on view
Object Name
calculating machine component
Physical Description
metal (overall material)
overall: 8.8 cm x 21.8 cm x 10.3 cm; 3 15/32 in x 8 19/32 in x 4 1/16 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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