Patent model for Edison speaking telephone, US Patent #208299

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Object Details

maker

Edison, Thomas Alva

Description (Brief)

A model to accompany the application for US Patent #208299, "Speaking Telephone," issued 24 September 1878 to Thomas A. Edison. Two instruments mounted horizontally on a wooden base. Brass and wood with mica diaphragm, electromagnet and contact outside with small wooden mockups of batteries, coils and condensers.

date made

1877

ID Number

EM.252622.1

catalog number

252622.1

accession number

49064

Object Name

Telephone

telephone set

Other Terms

Telephone; Telephones; Transmitter

Measurements

overall: 4 in x 12 in x 5 in; 10.16 cm x 30.48 cm x 12.7 cm

See more items in

Work and Industry: Electricity

Exhibition

Lighting a Revolution

Exhibition Location

National Museum of American History

Data Source