Electrical telegraph
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Electrical telegraphy is point-to-point distance communicating via sending electric signals over wire, a system primarily used from the 1840s until the late 20th century. It was the first electrical t
Cooke and Wheatstone's five-needle telegraph from 1837
Morse telegraph
Hughes telegraph, an early (1855) teleprinter built by Siemens and Halske
Sömmering's electric telegraph in 1809
Morse code
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Morse code is a telecommunications method which encodes text characters as standardized sequences of two different signal durations, called dots and dashes, or dits and dahs. It is named after Samuel
Electrical telegraph
…received messages. It embossed dots and dashes on a moving paper tape by a stylus which was operated by an electromagnet. Morse and Vail developed the Morse code signalling alphabet. On 24 May 1844, Morse sent to Vail the historic first message “WHAT HATH GOD WROUGHT" from the Capitol in Washington to the old…
This Morse key was originally used by Gotthard railway, later by a shortwave radio amateur.
Single needle telegraph instrument
Telegraph key and sounder; the signal is "on" when the knob is pressed, and "off" when it is released, length and timing of the dits and dahs are entirely controlled by the telegraphist
Morse code receiver that records on paper tape