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Experimenters sent an electrical impulse along a wire thread over a distance of more than 0.25 km.
1791
Claude Chappe invented the semaphore telegraph. It was used to send an optical image over a distance of almost 700 km in less than one hour.
1819
Hans Oersted reported the deflection of a pivoted, magnetized needle by an electric current.
1831
Michael Faraday showed that vibrations of a piece of iron or steel could be converted into electrical impulses.
1832
1835
Samuel Morse developed the Morse Code as a series of dots and dashes
1837
The English inventors, Cooke and Wheatstone, demonstrated the use of a five needle electric telegraph for the railroad in England.
1837
Samuel Morse demonstrated his first telegraph key and filed a patent for it.
1842
Samuel Morse oversaw the laying of the first underwater cable in New York Harbor
1843
The first telegraph line was built. It ran between Baltimore, Maryland and Washington- a total distance of 60 km.
1844
1846
Royal E. House invented the printing telegraph. It was a primitive system that required two operators to send a message. It only lasted a few years.
1848
1854
The telegraph was first used by the Anglo-French military to maintain contact between troops and their command headquarters during the Crimean war. Two submarine cables were laid from Newfoundland to Canada.
1856
1866
1874
Thomas Edison designed the quadruplex, enabling eight telegraph operators to handle four messages simultaneously, two in each direction, all on the same line.
1875
C.R. Carey designed a primitive kind of television system. The system was not practical for wide use.
1876
1878
The first commercial telephone switching station was set up in Connecticut. It served 21 telephones
1778
1880
Paul Nipkow was granted the first patent for a television device in Germany. Nipkow could not afford to develop his television scanner very far, and his patent lapsed.
1884
The Italian inventor Guglielmo Marconi sent the first recorded message through space by electromagnetic waves, i.e. radio waves
1896
Strong copper wire was developed. Prior to this, all wires were made of iron, which rusted quickly and did not conduct electricity as well as copper. Marconi succeeded in transmitting and receiving wireless signals between Newfoundland and Cornwall , England.
1900
1901
Donald Murray of England introduced a scheme that involved punching holes in paper tape to send a message. This was the forerunner of the more common teleprinters, such as the teletype.
1903
Lee de Forest invented the three-element vacuum tube, which became useful as an amplifier in a telephone repeating system.
1923
Vladymir K. Zworykin patented the iconoscope, an electronic scanning vacuum tube. Tubes like these were soon to be incorporated into television.
1926
1927
John Baird demonstrated a complete television system that used mechanical scanning of the objects. The pictures produced were very poor.
1939
NBC of New York gave public demonstrations of television transmissions at the World s Fair.
1946
1948
The first commercial operation of television systems began in the United States.
1950
RCA received approval from the Federal Communications Commission for their development of a color television that was compatible with existing systems.
1957
The world s first human made satellite was put into orbit by the Soviet Union
1962
Telstar was launched. It was the first active satellite that functioned as a microwave transmitter and receiver. It transmitted live telephone and television conversations over the Atlantic. It was only used fro several months before becoming outdated
1963
Syncom II, the first geosynchronous satellite (a satellite that orbits the Earth at the speed of the Earth s rotation, thus remaining continuously over one spot on Earth) was positioned over theAtlantic Ocean.
1964
Syncom III transmitted the first sustained television picture, the opening of the Olympic Games in Tokyo, from across the Pacific.
1969
The sending of the Apollo 11 spacecraft to the Moon. On July 20, Neil Armstrong stepped off the lunar landing module and transmitted his message to Earth: That s one small step for man; one giant leap for mankind .
1972
Canada became the first country to establish a geosynchronous domestic satellite system (TELESAT) for television programming. With increasing technology, the sizes of receiving dishes werebeing reduced. This enables an explosion in the number of receiver stations around the world as both radio and television industries became active users of satellites.
1981
Deployment of the Canadarm, a remote manipulator system used on the space shuttle. It is used to place, repair, and retrieve communication satellites in space. Voyager 2 transmits satellite information and images of the Planet Uranus to Earth
1986
1988
World s first transoceanic optic fiber submarine cable is laid from New Jersey to France, a distance of 6500 km.