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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]
Telegraph messengers collecting telephone messages for bombed-out telephone subscribers at an emergency telephone bureau, 1942. World War II saw an increase in telegraph traffic. Usage peaked in 1945 with 63 million messages. Children evacuated overseas were given one free telegram per month to stay in touch with their parents. [280]
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 .
Contemporary map of the 1858 transatlantic cable route. Transatlantic telegraph cables were undersea cables running under the Atlantic Ocean for telegraph communications. . Telegraphy is an obsolete form of communication, and the cables have long since been decommissioned, but telephone and data are still carried on other transatlantic telecommunication
The Foy–Breguet telegraph code. The first attempt to bring the electrical telegraph to France was made by Samuel Morse in 1838. He demonstrated his system to the French Academy of Sciences and made a bid for the contract to install a telegraph along the line of the Paris to Saint-Germain railway.
The Electric Telegraph Company (ETC) was a British telegraph company founded in 1846 by William Fothergill Cooke and John Ricardo. It was the world's first public telegraph company. The equipment used was the Cooke and Wheatstone telegraph, an electrical telegraph developed a few years earlier in collaboration with Charles Wheatstone.
When the Electrical telegraph was brought into use by the British Army during the Crimean War it became the responsibility of the Royal Engineers (RE). In 1884 the RE established a Telegraph Battalion, organised into two 'divisions', of which 2nd Division in London handled communications for the higher levels of command in conjunction with the General Post Office.