Analog Computing Component - Intermittent Drive

Analog Computing Component - Intermittent Drive

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Usage conditions apply
This component has an aluminum frame and various steel parts. Three shafts running across the frame carry a varied of gears and rings. A deteriorating plastic label reads: #46 INTERMITTENT (/) DRIVE. A number on the side reads: 209258 7.
According to the accession file, this unit was used to temporarily disconnect units that did not have the complete range of the Ford Instrument Company range keeper or computer and to reconnect the unit when data values reached the range of the disconnected unit.
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
steel, aluminum, brass (overall material)
overall: 8.8 cm x 8.6 cm x 8.6 cm; 3 15/32 in x 3 3/8 in x 3 3/8 in
ID Number
catalog number
accession number
Credit Line
Ford Instrument Company, Division of Sperry Rand Corporation
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Medicine and Science: Mathematics
Data Source
National Museum of American History
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