Magnavox type R-3 model B "Telemegafone" loudspeaker driver
date: label: date made
content: ca 1918
label: date made
content: c 1918
name: label: maker
content: Magnavox Company
notes: label: Description (Brief)
content: Marked: "Radio Magnavox / Patented Made in U.S.A. / Type R-3 / Mod. B / No. 23938 / The Magnavox Co. / Oakland, California". Patents: 1051113 -- 1/21/13; 1105924 -- 8/4/14; 1266988 -- 5/21/18. Driver unit for Magnavox "Telemegafone" system. Horizontal coil with cover, 2 binding posts on either end for external circuit connections (4 posts total).
label: Location
content: Currently not on view
place: label: place made
content: United States: California, Oakland
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Franklin Wingard
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.321470
label: catalog number
content: 321470
label: accession number
content: 241556
label: patent number
content: 1051113
label: patent number
content: 1105924
label: patent number
content: 1266988
label: serial number
content: 23938
objectType: label: Object Name
content: loud speaker
label: Object Name
content: loudspeaker
physicalDescription: label: Measurements
content: overall: 5 1/2 in x 5 1/2 in x 8 1/4 in; 13.97 cm x 13.97 cm x 20.955 cm