Model of Joseph Henry 1837 electromagnetic motor
date: label: Date made
content: ca 1898
name: label: associated person
content: Henry, Joseph
label: maker
content: Model Shop, United States National Museum
notes: label: Description (Brief)
content: Model of Joseph Henry's electromagnetic motor of 1837. A straight electromagnet is mounted horizontally and supported on knife edges at its center. A permanent bar magnet is placed below the electromagnet. A double set of terminals is provided for the electromagnet coil, one pair at each end of the horizontal bar. A battery was placed under each set of terminals. An arrangement for reversing the flow of current as each terminal pair dipped into a battery, established the principle of commutation. Reference: MacLaren, Rise of the Electrical Industry in the 19th Century, pages 21-22.
label: Location
content: Currently not on view
place: label: place made
content: United States: District of Columbia, Washington
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.181324
label: catalog number
content: 181324
label: nonaccession number
content: 1997.3117
label: catalog number
content: 180928
objectType: label: Object Name
content: Motor
label: Object Name
content: electric motor
label: Other Terms
content: Motor; Motors and Generators
physicalDescription: label: Measurements
content: overall: 12 in x 20 1/2 in x 5 1/2 in; 30.48 cm x 52.07 cm x 13.97 cm