Calculating Machine Components

Calculating Machine Components

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This object was collected by Brooklyn high school teacher and historian of mathematics L. Leland Locke. A steel shaft holds steel and brass discs six centimeters in diameter. Some discs hold pins and have partially toothed edges. Others are thinner, and may go only part way around. These discs also have a toothed edge and may have a protrusion like those on pinwheel calculating machines.
Currently not on view
Object Name
calculating machine component
Physical Description
metal (overall material)
overall: 16 cm x 8 cm x 8 cm; 6 5/16 in x 3 5/32 in x 3 5/32 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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