General Electric type 85 direct current bi-polar motor
date: label: date made
content: ca. 1893
label: date made
content: ca 1893
name: label: maker
content: General Electric Company
notes: label: Description (Brief)
content: Nameplate reads: "Bi-polar Motor / No. 347 / Type '85 75 kw / Speed 2100 Volts 250 / General Electric Company"; on metal label: "Edison System-Patented / Dec. 23, 1879: Aug. 22, 1882 / Sept. 19, 1882; Oct. 10, 1882". Base plate stamped "273". Bi-polar DC motor has two curved pole pieces beneath field magnet axis. Armature turns thru field, and has segmented commutator on one end with two sets of carbon brushes affixed to a rigging mechanism which is adjustable with a rocker arm. No coupling wheel is provided. Reference: Instructions for Installing and Operating Bi-polar Generators for Incandescent Lighting (Schenectady: General Electric Co., 1894).
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from General Electric Company Research Laboratory
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.315952
label: catalog number
content: 315952
label: accession number
content: 222955
objectType: label: Object Name
content: motor
label: Object Name
content: electric motor
physicalDescription: label: Measurements
content: overall: 15 1/2 in x 21 in x 10 in; 39.37 cm x 53.34 cm x 25.4 cm