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Wire obstacles were used by Union Army general Ambrose Burnside during the Battle of Fort Sanders in the Knoxville campaign of the American Civil War, when telegraph wire was strung between tree stumps 30 to 80 yards in front of one part of the Union line.
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.
An optical telegraph is a line of ... as an electrical system with many miles of unguarded wire. ... crossed on the Swedish archipelagos was a major obstacle. Akrell ...
Initially these telegraph lines were only constructed for temporary use because of the brittle exposed copper wire that was used. But, after insulated wire began to be used, permanent lines were built. The Telegraph Construction Corps would load a coil of this wire on a mule's back and lead it straight forward to unreel the wire.
Part of the Russian–American Telegraph line bearing the single wire of an earth-return circuit, c. 1866. Earth-return telegraph is the system whereby the return path for the electric current of a telegraph circuit is provided by connection to the earth through an earth electrode. Using earth return saves a great deal of money on installation ...
In 1884, Woods received his first patent, for a steam boiler furnace, [17] and in 1885, Woods patented an apparatus that was a combination of a telephone and a telegraph. The device, which he called "telegraphony", would allow a telegraph station to send voice and telegraph messages through Morse code over a single wire.
A telegraph message sent by an electrical telegraph operator or telegrapher using Morse code (or a printing telegraph operator using plain text) was known as a telegram. A cablegram was a message sent by a submarine telegraph cable, [4] often shortened to "cable" or "wire".
Eckert combined these two jobs by connecting the telegraph wire to the post office. In 1852, Wade appointed Eckert to superintend the construction of a telegraph line between Pittsburg and Chicago on the Fort Wayne route. The lines under Eckert's management became part of the Union Telegraph Company, and his jurisdiction was substantially enlarged.