Patent model, Brush dynamo, US Patent #189,997
date: label: Date made
content: 1877
name: label: maker
content: Brush, Charles F.
notes: label: Description (Brief)
content: Model to accompany US patent 189997, "Dynamo Electric Machine," issued 24 April 1877 to Charles F. Brush. A wooden model of a bipolar dynamo on a wooden base. Two binding posts, wooden pulley on one end of armature. Two pairs of horizontally-mounted field coils. A ring-type rotor spins between the coil pairs. A commutator with brass brushes is set to the left of the rotor. No extant maker's markings.
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.308580
label: catalog number
content: 308580
label: accession number
content: 89797
label: patent number
content: 189997
objectType: label: Object Name
content: Dynamo Electric Machine
label: Object Name
content: generator
label: Other Terms
content: Motor; Dynamo Electric Machine; Motors and Generators
physicalDescription: label: Measurements
content: overall: 7 1/2 in x 12 in x 6 in; 19.05 cm x 30.48 cm x 15.24 cm