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The earliest code used commercially on an electrical telegraph was the Cooke and Wheatstone telegraph five needle code (C&W5). This was first used on the Great Western Railway in 1838. C&W5 had the major advantage that the code did not need to be learned by the operator; the letters could be read directly off the display board.
Cooke and Wheatstone's five-needle telegraph from 1837 Morse telegraph Hughes telegraph, an early (1855) teleprinter built by Siemens and Halske Electrical telegraphy is a point-to-point text messaging system, primarily used from the 1840s until the late 20th century.
The electric telegraph was slower to develop in France due to the established optical telegraph system, but an electrical telegraph was put into use with a code compatible with the Chappe optical telegraph. The Morse system was adopted as the international standard in 1865, using a modified Morse code developed in Germany in 1848. [1]
A telegraph key, clacker, tapper or morse key is a specialized electrical switch used by a trained operator to transmit text messages in Morse code in a telegraphy system. [1] Keys are used in all forms of electrical telegraph systems, including landline (also called wire) telegraphy and radio (also called wireless) telegraphy .
Operating signals are a type of brevity code used in operational communication among radio and telegraph operators. For example: Prosigns for Morse code; 92 Code: telegraph brevity codes; Q code: initially developed for commercial radiotelegraph communication and adopted by other radio services; QN Signals: published by the ARRL and used in ...
The Cooke and Wheatstone telegraph was an early electrical telegraph system dating from the 1830s invented by English inventor William Fothergill Cooke and English scientist Charles Wheatstone. It was a form of needle telegraph , and the first telegraph system to be put into commercial service.
Myer's code remained in use in the US until 1886 when it was replaced by Morse code for flag signals. [63] It came back into use after 1896, [50] but was officially discontinued in 1912 when International Morse code was mandated for all types of visual signaling. Inconsistently, American Morse code was mandated for Army electrical telegraph ...
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