Telegraph Key

Telegraph Key

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Description (Brief)
Telegraph keys are electrical switches used to send messages in code. The message travels as a series of electrical pulses through a wire. This British key was designed for testing underwater telegraph cables. The operator used the key to apply a charge then remove the charge from the cable to make certain the circuit worked. One handle is missing from this specimen.
Location
Currently not on view
Object Name
telegraph key
submarine telegraph key
Other Terms
telegraph key; Telegraphy
maker
Muirhead & Co. Ltd.
Physical Description
brass (overall material)
metal (overall material)
rubber (overall material)
Measurements
overall: 4 in x 9 1/2 in x 4 1/4 in; 10.16 cm x 24.13 cm x 10.795 cm
ID Number
EM.336823
catalog number
336823
accession number
1978.2346
Credit Line
from the French Cable Company
See more items in
Work and Industry: Electricity
Communications
Telegraph Keys
Data Source
National Museum of American History
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