Warren Spring Motor, Patent Model
date: label: date made
content: 1880
label: patent date
content: 1880-04-20
name: label: inventor
content: Warren, John
notes: label: Description
content: This model was submitted to the U.S. Patent Office with the application for the patent issued to John Warren, of Detroit, Michigan, April 20, 1880, no. 226813.
label: Description
content: The motor represented is of the class intended to operate light machinery such as a phonograph but differs from most of the class in that it employs a spiral spring instead of the usual coil spring. It converts the rectilinear motion of the spring into rotary motion and equalizes the varying tension of the spring.
label: Description
content: The free end of the spring carries a nut that engages in a spiral-grooved motor shaft, which revolves at the axis of the spring. A hand crank, worm, and worm wheel are used to compress the spring by turning the shaft in the reverse direction. The power is taken from a bevel gear on the shaft. A ball nut, which employs a ball to follow in the groove of the shaft, is used because an ordinary nut would not work in the groove of varying pitch. The varying pitch is used to compensate for the varying tension of the spring.
label: Description
content: Reference:
label: Description
content: This description comes from the 1939 Catalog of the Mechanical Collections of the Division of Engineering United States Museum Bulletin 173 by Frank A. Taylor.
label: Location
content: Currently not on view
place: label: associated place
content: United States: Michigan, Detroit
setName: label: See more items in
content: Work and Industry: Mechanical and Civil Engineering
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content: Bulletin 173
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content: Engineering, Building, and Architecture
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content: Work
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content: Industry & Manufacturing
publisher: label: Related Publication
content: Frank A. Taylor. Catalog of the Mechanical Collections of the Division of Engineering United States National Museum, Bulletin 173
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MC.308835
label: catalog number
content: 308835
label: accession number
content: 89797
label: patent number
content: 226,813
objectType: label: Object Name
content: patent model, motor, spring
label: Object Type
content: Patent Model
physicalDescription: label: Physical Description
content: brass (overall material)
label: Measurements
content: overall: 12 1/2 in x 4 7/8 in x 4 3/4 in; 31.75 cm x 12.3825 cm x 12.065 cm