Telegraph Key

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 disc on the knob to protect against the accidental shock. Until recently, “wireless” meant radio and early wireless equipment often used high voltages.
Currently not on view
Object Name
telegraph key
semi-automatic key
sending key
Clapp-Eastham Co.
Physical Description
plastic (overall material)
metal (overall material)
overall: 1 3/4 in x 3 1/2 in x 8 in; 4.445 cm x 8.89 cm x 20.32 cm
ID Number
catalog number
accession number
Telegraph Keys
See more items in
Work and Industry: Electricity
Telegraph Keys
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
from Franklin Wingard
Additional Media

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