Telegraph Key
date: label: date made
content: ca 1910
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 key has a switch on the side called a circuit-closer that takes the key off-line when not in use.
setName: label: See more items in
content: Work and Industry: Electricity
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content: Telegraph Keys
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content: Communications
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content: American Enterprise
label: Exhibition
content: American Enterprise
label: Exhibition Location
content: National Museum of American History
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 2013.3040.08
label: nonaccession number
content: 2013.3040
label: catalog number
content: 2013.3040.08
objectType: label: Object Name
content: telegraph key
physicalDescription: label: Physical Description
content: metal (overall material)
label: Physical Description
content: plastic (overall material)
label: Measurements
content: overall: 1 3/8 in x 2 3/4 in x 5 1/4 in; 3.4925 cm x 6.985 cm x 13.335 cm