Davis "paddle-wheel" electro-magnetic engine

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Henry's Experimental Galvanometer

Description (Brief):

A direct current motor made by Daniel Davis, ca. 1848, no extant maker's markings. A horseshoe type permanent magnet has a winding on each side connected to terminal posts on the base. A brass wheel has 3 iron pieces which rotate in the field of the electromagnet poles. A spoked commutator arrangement is affixed to the wheel shaft with a brush touching the spokes. This motor was supposed to have been used by Joseph Henry. Reference: Davis, Manual of Magnetism, 1848 (Published in Boston by Daniel Davis) pages 208-210.

Date Made: ca 1848

User: Henry, JosephMaker: Davis, Jr., Daniel

Location: Currently not on view

See more items in: Work and Industry: Electricity

Exhibition:

Exhibition Location:

Credit Line: from the Smithsonian Institution Collection of Apparatus, thru William C. Winlock

Data Source: National Museum of American History

Id Number: EM.181445Catalog Number: 181445Accession Number: 2006.0177

Object Name: Motorelectric motorOther Terms: Motor; Magnetic Devices; Electromagnetic Devices; Electromagnetic Devices

Measurements: overall: 11 1/4 in x 4 in x 4 3/4 in; 28.575 cm x 10.16 cm x 12.065 cm

Metadata Usage: CC0

Guid: http://n2t.net/ark:/65665/ng49ca746ab-6553-704b-e053-15f76fa0b4fa

Record Id: nmah_705514

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