Grant 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. Nine cylinders are mounted on a common shaft. Each of the first four cylinders has a lever and a spring-activated device attached to it. On the fourth cylinder, there is a linkage to a fifth cylinder. The fifth cylinder has only a spring-activated device attached to it. The sixth through ninth cylinders have two such devices each, at varying separations. There are levers to the left of each cylinder.
Currently not on view
George B. Grant
place made
United States: Massachusetts, Boston
Physical Description
metal (overall material)
overall: 8 cm x 26 cm x 8 cm; 3 5/32 in x 10 1/4 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
Science & Mathematics
Calculating Machines
Data Source
National Museum of American History