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  TechnologyElectrical and Nuclear Engineering
satellite dishes Telecommunication

tel' i kom mU' ni kA' shun, the transmission of information in the form of electromagnetic signals

 
CONTENTS
Alexander Graham BellAlexander Graham Bell became interested in the electrical transmission of speech due to an interest in helping deaf people learn to speak. His experiments led to development of the telephone, for which he received a patent on March 7, 1876.
Lee De ForestLee De Forest invented a vacuum tube that could amplify a weak electrical signal, in 1907. The Audion, as he called it, proved to be the fastest electronic switching element of the time, and would not be improved upon until the invention of the transistor in 1948. He was also the first to use the term "radio" instead of "wireless telegraphy," and developed a process for recording sound on movie film.
Philo Taylor FarnsworthPhilo Taylor Farnsworth began working on what became the television while still in high school. On September 7, 1927, he and a small group of investors watched as his system transmitted its first crude image.
Samuel Finley Breese MorseSamuel Finley Breese Morse struggled for many years to gain recognition as a painter, but became better known for the telegraph, which he successfully demonstrated to Congress and the public on May 24, 1844.
Almon StrowgerAlmon Strowger was an undertaker who had become frustrated over human telephone operators misdirecting calls from his customers. Determined to get rid of the need for human operators, he invented the automatic telephone exchange in 1891, and the dial telephone in 1896.
TelstarTelstar was the first active communications satellite. It was launched from Cape Canaveral on July 10, 1962. It relayed its first live television pictures -- of a flag outside its ground station in Andover, Maine -- on the date of its launch, and relayed the first live transatlantic television signal on July 23.
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This page was last updated on 01/15/2015.

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