Gray single tone Harmonic Telegraph Transmitter
date: label: date made
content: 1880
name: label: maker
content: Gray, Elisha
notes: label: Description (Brief)
content: Gray Harmonic Telegraph Transmitter. Steel reed hangs in front of one pole of an electromagnet. It will vibrate at a set frequency. There is a key, so the signal can be made and broken. Similar to cat # 324111. Magnet coil 2.5" long, 10 Ohms. Written on bottom in ink: "Second single tone transmitter / Edwd. H. Beebe Notary Public May 14, 1880."
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Oberlin College, Dept. of Physics, thru David L. Anderson
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.324120
label: catalog number
content: 324120
label: accession number
content: 253039
objectType: label: Object Name
content: Transmitter, Telegraph, Single Tone
label: Object Name
content: transmitter, telegraph,
label: Object Name
content: telegraph transmitter
physicalDescription: label: Measurements
content: overall: 4 1/4 in x 6 in x 5 1/8 in; 10.795 cm x 15.24 cm x 13.0175 cm