Patent model for Edison speaking telegraph, US Patent #203013
date: label: Date made
content: 1878
name: label: maker
content: Edison, Thomas Alva
notes: label: Description (Brief)
content: A model to accompany the application for US Patent #203013, "Speaking Telegraph," issued 30 April 1878 to Thomas A. Edison. A round iron frame with mouthpiece and metal diaphragm, contact underneath. A cloth-insulated 2-conductor cord is connected to the frame.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.252619
label: catalog number
content: 252619
label: accession number
content: 49064
label: patent number
content: 203013
objectType: label: Object Name
content: Speaking Telegraph
label: Object Name
content: telephone
label: Object Name
content: telephone component
label: Other Terms
content: Speaking Telegraph; Telephones; Transmitter
physicalDescription: label: Measurements
content: overall: 3 3/8 in x 3 1/4 in; 8.5725 cm x 8.255 cm