Patent model for Edison speaking telephone, US Patent #208299
date: label: date made
content: 1877
name: label: maker
content: Edison, Thomas Alva
notes: label: Description (Brief)
content: 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.
setName: label: See more items in
content: Work and Industry: Electricity
label: Exhibition
content: Lighting a Revolution
label: Exhibition Location
content: National Museum of American History
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.252622.1
label: catalog number
content: 252622.1
label: accession number
content: 49064
objectType: label: Object Name
content: Telephone
label: Object Name
content: telephone set
label: Other Terms
content: Telephone; Telephones; Transmitter
physicalDescription: label: Measurements
content: overall: 4 in x 12 in x 5 in; 10.16 cm x 30.48 cm x 12.7 cm