Analog Computing Component - 400 Cycle Resolver

Analog Computing Component - 400 Cycle Resolver

<< >>
Usage conditions apply
This bright red metal component is cylindrical in shape, with eight wires coming out of one end. The cylinder fits into a shaped metal piece near the top - a shaft comes out the top. A white mark on the shaped metal piece reads: 75.
According to the accession file, Ford Instrument Company made this device as an electrical transmission unit for its range keepers and computers.
A.B. Clymer, "The Mechanical Analog Computers of Hannibal Ford and William Newell," Annals of the History of Computing, 15, #2, 1993, 19-34.
Accession file.
Currently not on view
Object Name
analog computing component
date made
ca 1920-1955
Ford Instrument Company
place made
United States: New York, Queens, Long Island City
Physical Description
aluminum (overall material)
plastic (wire covering material)
brass (disc matrial)
overall: 14 cm x 6.2 cm x 6.2 cm; 5 1/2 in x 2 7/16 in x 2 7/16 in
ID Number
catalog number
accession number
Credit Line
Ford Instrument Company, Division of Sperry Rand Corporation
See more items in
Medicine and Science: Mathematics
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.

Note: Comment submission on our collection pages is temporarily unavailable. Please check back soon!

If you have a question or require a personal response, please visit our Museum Collection FAQ or contact page.