Calculating Machine Components, Possibly Monroe

Calculating Machine Components, Possibly Monroe

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These objects were collected by Brooklyn high school teacher and historian of mathematics L. Leland Locke. The cloth bag held two frame pieces, nine key stems with white keys,one key stem with a red key, two numeral wheels (one with red and black numbers on white and one white numbers on black), four pieces from a selector mechanism and carry trigger (three disc-shaped and one shaped like a spool of thread), twp small metal pieces, and five small screws in two shapes.
Currently not on view
Object Name
calculating machine components
Physical Description
metal (overall material)
cloth (overall material)
overall: 1 cm x 22 cm x 22 cm; 13/32 in x 8 21/32 in x 8 21/32 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

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