Thomson bi-polar direct current motor
date: label: date made
content: ca 1888
name: label: maker
content: Thomson-Houston Electric Company
notes: label: Description (Brief)
content: Metal plate reads: No. 3987 Class 15 Vol B 220 Patented Oct. 5, 1880, Jan. 5, 1886, July 13, 1886. A paper label affixed to the frame reads: "D.C. Bipolar Motor. Built by Thomson-Houston Co., Lynn. 220 V. Surface Wound Armature." This is a bipolar motor with field magnets arranged below the armature, giving a greater magnetic flux concentration through the armature. The winding of the armature is a modified Siemens arrangement, with the armature winding and field magnet coils connected in parallel. Two sets of carbon brushes are utilized (2 each) in a rigging which permits individual brush tension settings. Reference: Houston and Kennely, Alternating Electric Currents. page 156.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from the Massachusetts Institute of Technology; Dept. of Mechanical Engineering
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.315077
label: catalog number
content: 315077
label: accession number
content: 215398
objectType: label: Object Name
content: motor
label: Object Name
content: electric motor
label: Object Name
content: dc motor, Thomson
physicalDescription: label: Measurements
content: overall: 29 in x 23 in x 40 in; 73.66 cm x 58.42 cm x 101.6 cm