Seely direct current dynamo, 1867

Seely direct current dynamo, 1867

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Description (Brief)
No extant maker's markings. Four cylindrical field magnets are arranged to energize two pole pieces. A ring-type armature is utilized with two curved commutator segments. Brushes are missing from this specimen. See US Patent 229191, Armature for Magneto-Electric Machines, issued 22 June 1880 to Charles A. Seeley. Claim pertaining to armature: an arrangement of wire radially in a disc to form the armature of a magneto-electric machine. A modification of Arago's disc. References: biography of Seeley, New York Tribune, Nov. 7, 1892; and N.Y. Tribune, March 28, 1867, "Electric Lighting."
Currently not on view
Object Name
electrical generator
Other Terms
Generator; Motors and Generators
Date made
Seeley, Charles A.
overall: 17 in x 11 in x 12 in; 43.18 cm x 27.94 cm x 30.48 cm
ID Number
catalog number
accession number
Credit Line
From American Institute of Electrical Engineers / Institute of Electrical and Electronics Engineers
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Work and Industry: Electricity
Data Source
National Museum of American History
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