Telegraph Key


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Related to Telegraph Key: Morse code

Telegraph Key

 

a simple transmitter of telegraph signals in Morse code; part of Morse telegraph equipment. The telegrapher manipulates a lever, which closes and opens a current-carrying circuit in a manner that corresponds with the transmitted message. The speed of transmission is 70–90 characters per min for regular keys and 120–150 characters per min for speed keys. Telegraph keys are used in radiotelegraph communications featuring manual processing of signals, especially by radio amateurs operating on shortwaves.

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With the mouse, students click on a telegraph key to see and hear Morse's first message.
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The sweet of love had telegraph keys installed in the seance tables.
They teamed up and bought an electrical shop in Cleveland to manufacture and sell electrical bells, batteries, telegraph keys, and other devices.