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Wireless Telegraph Key

Wireless Telegraph Key

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Description (Brief)
Telegraph keys are electrical on-off switches used to send messages in Morse code and can spark when the circuit opens. This wireless telegraph key features a large micarta disc on the knob to protect against the danger of accidental shock. Until recently, “wireless” meant radio and early wireless equipment often used high voltages.
Location
Currently not on view
Object Name
telegraph key
associated institution
Bureau of Standards
Physical Description
brass (overall material)
rubber (overall material)
wood (overall material)
metal (overall material)
Measurements
overall: 3 1/2 in x 3 in x 5 1/2 in; 8.89 cm x 7.62 cm x 13.97 cm
ID Number
EM.313506
catalog number
313506
accession number
188571
collector/donor number
R-2230
Credit Line
from the United States Bureau of Standards, Dept. of Commerce
See more items in
Work and Industry: Electricity
Communications
Telegraph Keys
Data Source
National Museum of American History
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Comments

This looks to be what is known as an "oil-break" key, perhaps manufactured by the French firm of DuCretet around 1910-1915. I hope this helps.

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