model of Froment direct current motor
date: label: Date made
content: c1845
label: date made
content: ca 1845
name: label: associated person
content: Froment
notes: label: Description (Brief)
content: No extant maker's markings. A circular frame has four pairs of electromagnet field coils spaced at 90o intervals around the frame. A revolving armature has spaced iron bars across a circumferential set of brass pates. The armature rotates in the magnetic field. Pulley wheels are at each end of the shaft; binding posts on the base. Reference: W. James King, Smithsonian Bulletin #228, page 270. (Frame construction on this motor is slightly different than in illustrations).
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.315538
label: catalog number
content: 315538
label: accession number
content: 216300
label: collector/donor number
content: 5h-13
objectType: label: Object Name
content: Motor
label: Object Name
content: electric motor
label: Other Terms
content: Motor; Electromagnetic Devices
physicalDescription: label: Measurements
content: overall: 7 1/2 in x 9 3/4 in x 4 in; 19.05 cm x 24.765 cm x 10.16 cm