Telegraph Key

Description (Brief)
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 moves this key’s lever from side to side to make signals. Called a simplex-duplex key, this key can send messages either on one-way circuits (simplex) or on circuits designed to send messages on lines designed to carry two messages at once (duplex.)
Location
Currently not on view
Object Name
key
telegraph key
Physical Description
brass (overall material)
metal (overall material)
plastic (overall material)
Measurements
overall: 2 in x 3 1/2 in x 7 in; 5.08 cm x 8.89 cm x 17.78 cm
ID Number
EM*331410
maker number
2
collector/donor number
14-03A
accession number
294351
catalog number
331410
See more items in
Work and Industry: Electricity
Communications
Telegraph Keys
Data Source
National Museum of American History, Kenneth E. Behring Center

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