Semi-automatic Telegraph Key

Description (Brief)
Telegraph keys are electrical on-off switches used to send messages in Morse code. A semi-automatic telegraph key like this one allows an operator to send land-line and wireless (radio) telegraph messages at a much faster rate than with an ordinary key. The key automatically produces rapid morse code dots by using a weighted pendulum to quickly make and break contact in the electrical circuit. The operator still makes the dashes manually.
Location
Currently not on view
maker
Western Union Corporation
Physical Description
metal (overall material)
Measurements
overall: 2 1/8 in x 3 3/8 in x 6 in; 5.3975 cm x 8.5725 cm x 15.24 cm
ID Number
EM.331690
accession number
294351
catalog number
331690
Credit Line
from Western Union Corporation
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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