Telegraph Key
notes: label: Description (Brief)
content: Telegraph keys are electrical on-off switches used to send messages in Morse code. The message travels as a series of electrical pulses through a wire. The operator pushes the key’s lever down briefly to make a short signal, a dot, or holds the lever down for a moment to make a slightly longer signal, a dash. The sequence of dots and dashes represent letters and numbers. This is a very simple design called a strap key.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
label: See more items in
content: Telegraph Keys
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content: Communications
creditLine: label: Credit Line
content: from Princeton University, Dept. of Electrical Engineering, thru Dean Howard Menand
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.318310
label: catalog number
content: 318310
label: accession number
content: 232729
objectType: label: Object Name
content: telegraph key
physicalDescription: label: Physical Description
content: brass (overall material)
label: Physical Description
content: rubber (overall material)
label: Measurements
content: overall: 1 1/2 in x 2 in x 4 in; 3.81 cm x 5.08 cm x 10.16 cm