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Semaphores
In the late 18th century optical telegraphs were invented by Claude Chappe in France and by George Murray in England. Called semaphores, they relayed messages from hilltop to hilltop with the aid of telescopes. -
Electric Currents
Christian Oersted’s discovery in 1819 that an electric current in a wire caused a magnetized needle next to the wire to deflect. The five-needle telegraph—patented by William Fothergill Cooke and Charles Wheatstone in London in 1837—utilized this principle with a panel imprinted with letters and numerals to which the five needles pointed singly or in pairs. It was widely used in Great Britain, especially for railroad signaling. -
Beta Telegraphs
Rapid development of telegraph systems came with the discovery that electric impulses could be used to transmit signals along a wire. -
Morse Code
4.)The message, "What hath God wrought?" sent later by "Morse Code" from the old Supreme Court chamber in the United States Capitol to his partner in Baltimore, officially opened the completed line of May 24, 1844. Morse allowed Annie Ellsworth, the young daughter of a friend, to choose the words of the message, and she selected a verse from Numbers XXIII, 23: -
Telephones Rising
The telephone exchange was an idea of the Hungarian engineer Tivadar Puskás (1844 - 1893) in 1876, while he was working foron a telegraph exchange.
The first commercial telephone exchange was opened at New Haven, Connecticut with 21 subscribers on 28 January 1878, in a storefront of the Boardmd's first switchboard for commercial use. Coy was inspired by Alexander Graham Bell's lectuan Building in New Haven, Connecticut. -
Quadruplex
Thomas Edison devised a quadruplex system in 1874 that permitted four messages to travel at once, two going in each direction. The most revolutionary system was invented by Jean-Maurice-Émile Baudot. . Thomas Edison devised a quadruplex system in 1874 that permitted four messages to travel at once, two going in each direction. The most revolutionary system was invented by Jean-Maurice-Émile Baudot. -
Cable All over the WORLD!
By the end of the 19th century, the world was crisscrossed by telegraph lines, including numerous cables across the Atlantic Ocean. -
Advancement
The invention of the telephone made a new range of technology available to telegraphy, particularly in the field of high-speed information transmission. -
Creed Telegraph System
The original Morse telegraph printed code on tape. However, in the United States the operation developed into sending by key and receiving by ear. A trained Morse operator could transmit 40 to 50 words per minute. Automatic transmission, introduced in 1914, handled more than twice that number. Canadian, Fredick Creed invented a way to convert Morse code to text in 1900 called the Creed Telegraph System. -
Teleprinter
Teleprinter machines came into use about 1925. Varioplex, introduced in 1936, enabled a single wire to carry 72 transmissions at the same time (36 in each direction).
