Revolving electromagnet demonstration
date: label: Date made
content: c. 1848
label: date made
content: ca 1848
notes: label: Description (Brief)
content: Motor (or generator?) similar to Daniel Davis units, ca 1848. No extant maker's markings. A two electromagnet revolving armature turns between a horseshoe magnet's field poles. A split ring on the shaft is utilized as a commutator. Voltage input and brush mechanism is missing from this specimen. Though supposedly used by Joseph Henry, this item probably was designed by Charles Page or Daniel Davis. See, Davis, Manual of Magnetism (Boston 1848) pages 212-213.
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.181743
label: catalog number
content: 181743
label: accession number
content: 33204
objectType: label: Object Name
content: Motor
label: Object Name
content: electric motor
label: Other Terms
content: Motor; Magnetic Devices; Electromagnetic Devices; Electromagnetic Devices
physicalDescription: label: Measurements
content: overall: 10 in x 6 in; 25.4 cm x 15.24 cm