Northern Electric direct current motor
date: label: date made
content: ca 1905
name: label: maker
content: Northern Electric Manufacturing Company
notes: label: Description (Brief)
content: Constant speed motor, serial number 26985. Name plate: "Tag-constant Speed Motor, Type S/ Machine No. 26985, HP-1, RPM 400-2000 Volts Amps 4.5. Pat. May 17, 1904. DC armature and commutator both designed to run on alternating current by means of the same regulator, so as to be synchronous with the AC frequency. Direct coupling arrangement on one end of shaft, commutator and brushes on other. Commutator badly scored on this specimen. Eight brushes are normally used in a four-set rigging. Reference : U.S. Patent #759967, Alternating Current Motor, issued 17 May 1904 to Alexander Churchward.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Michigan State University
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.315034
label: catalog number
content: 315034
label: accession number
content: 214022
objectType: label: Object Name
content: motor
label: Object Name
content: electric motor
label: Object Name
content: dc motor
physicalDescription: label: Measurements
content: overall: 17 in x 14 in x 29 in; 43.18 cm x 35.56 cm x 73.66 cm