Brooks Newman demonstration microphone device

Brooks Newman demonstration microphone device

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Description (Brief)
Wooden box with earpiece in center of hinged metal top. Unit is essentially a diaphragm-type transmitter with a carbon cylinder mounted inside. Brass cross pieces provide support for the carbon unit and contact spring. Marked: "Brooks / 1891 / Newman".
Location
Currently not on view
Object Name
Microphone
Other Terms
Microphone; Telephones; Transmitter; Carbon
date made
1891
Measurements
overall: 6 in x 6 in x 3 in; 15.24 cm x 15.24 cm x 7.62 cm
ID Number
EM.323735
catalog number
323735
accession number
252354
Credit Line
from Dunbar High School, thru Charles Lofton
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Work and Industry: Electricity
Data Source
National Museum of American History
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