General Electric type MP direct current motor
date: label: date made
content: ca 1894
name: label: maker
content: General Electric Company
notes: label: Description (Brief)
content: Nameplate reads: "Type MP no. 2720; Class 4-4.5; Form 1050; Amp. 36; Volts 120; HP 5; Speed 960. Pat. 1/13/80; 8/2/81; 10/82; 3/4/90; 10/14/90; 8/18/82; 7/11/83; 12/25/88; 12/2/90; 11/14/93." Circular frame houses four field electromagnets. Rotating central armature is of the drum type with segmented commutator on one end of shaft. Four sets of carbon brushes are used in a rocker arm assembly which permits changing brush positions by means of pulley wheels. Appears similar to figure 62, MacLaren, Rise of the Electrical Industry in 19th Century, page 92.
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 U. S. Capitol thru J. George Stewart
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.319206
label: catalog number
content: 319206
label: accession number
content: 235994
label: serial number
content: 2720
objectType: label: Object Name
content: motor
label: Object Name
content: electric motor
physicalDescription: label: Measurements
content: overall: 23 in x 27 in x 34 in; 58.42 cm x 68.58 cm x 86.36 cm