Calculating Machine Components

Calculating Machine Components

Usage conditions apply
These objects were collected by Brooklyn high school teacher and historian of mathematics L. Leland Locke. The metal rings come in three sizes. Seventeen are.5 cm. in diameter (one of these has been cut), six are.8 cm. in diameter, and four are 1.3 cm. in diameter.
Currently not on view
Object Name
calculating machine components
Physical Description
metal (overall material)
overall: 2.7 cm x 1.1 cm x 1.1 cm; 1 1/16 in x 7/16 in x 7/16 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
Nominate this object for photography.   

Our collection database is a work in progress. We may update this record based on further research and review. Learn more about our approach to sharing our collection online.

If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. If you need to request an image for publication or other use, please visit Rights and Reproductions.


Add a comment about this object