|
Telegraph (other)
Telegraph is any apparatus or process to convey messages over long distances with no intermediary messenger. Telegraph may also refer to: Related to telegraphy * Electrical telegraph, sends and receives messages via electric signals * Printing telegraph, electrical telegraph that uses plain text instead of code * Optical telegraph, sending visual signals with pivoting shutters in towers * Hydraulic telegraph, based on the displacement of water in pipes, or on container water levels * Engine order telegraph, device on a ship used by the pilot to signal engine speeds Arts and entertainment * Telegraphing (entertainment), giving a clear hint of the meaning or outcome of a dramatic action through acting Music * ''Telegraph'' (album), a 2005 album by Drake Bell (includes the title song) * Telegraphs (band), an English alternative-rock band * "Telegraph" (song), a 1983 single by Orchestral Manoeuvres in the Dark * ''Telegraph Melts'', a 1986 album by Jandek Periodicals * The Teleg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telegraph
Telegraphy is the long-distance transmission of messages where the sender uses symbolic codes, known to the recipient, rather than a physical exchange of an object bearing the message. Thus flag semaphore is a method of telegraphy, whereas pigeon post is not. Ancient signalling systems, although sometimes quite extensive and sophisticated as in China, were generally not capable of transmitting arbitrary text messages. Possible messages were fixed and predetermined and such systems are thus not true telegraphs. The earliest true telegraph put into widespread use was the optical telegraph of Claude Chappe, invented in the late 18th century. The system was used extensively in France, and European nations occupied by France, during the Napoleonic era. The electric telegraph started to replace the optical telegraph in the mid-19th century. It was first taken up in Britain in the form of the Cooke and Wheatstone telegraph, initially used mostly as an aid to railway signalling. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
