patent model, Maxim dynamo, US #228544
date: label: Date made
content: 1880
name: label: maker
content: Maxim, Hiram S.
notes: label: Description (Brief)
content: No extant maker's markings. This specimen is not a complete dynamo, but rather a circular armature with three sample windings on the rim. Construction consists of individual laminated metal sheets clamped to form a single unit. A radial type commutator (catalog number 309338) is used with this machine. US Patent #228544, Dynamo electric machine, issued 8 June 1880 to Hiram S. Maxim. Patent Claim: An armature for a dynamo electric machine constructed in such a way that all parts are open to free circulation of air.
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.309339
label: catalog number
content: 309339
label: accession number
content: 89797
label: patent number
content: 228544
objectType: label: Object Name
content: Dynamo Electric Machine
label: Object Name
content: generator
label: Object Name
content: dynamo
label: Other Terms
content: Dynamo Electric Machine; Motors and Generators
physicalDescription: label: Measurements
content: overall: 10 in x 8 in; 25.4 cm x 20.32 cm