Thomson-Houston arc light generator with spherical armature
date: label: date made
content: 1875
label: date made
content: ca 1879
label: date made
content: ca.1879
name: label: maker
content: Thomson-Houston Electric Company
notes: label: Description (Brief)
content: This is the first spherical Thomson-Houston arc light dynamo, built in 1879. The armature consists of three wires, joined to together at one end, and attached to a three part commutator at the other. The interior sections of the field magnets are cup shaped, to fit the armature closely. One brush is missing, the other is curled back in the holder. Reference: Schroeder, History of the Electric Light, page 38; MacLaren, Rise of the Electrical Industry in the 19th Century, page 116 (photo, figure 75), description, page 121.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from General Electric Company
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.181727
label: catalog number
content: 181727
label: accession number
content: 33185
objectType: label: Object Name
content: Generator
label: Object Name
content: electrical generator
label: Object Name
content: dynamo
label: Other Terms
content: Generator; Motors and Generators
physicalDescription: label: Measurements
content: overall: 10 3/4 in x 20 1/2 in x 15 in; 27.305 cm x 52.07 cm x 38.1 cm