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Lee DeForest Biography

Lee De Forest, (August 26, 1873 - June 30, 1961), was an American discoverer with over 300 patents reach his name. De Forest trumped-up the audion, a vacuum tootle that takes weak electrical signals and amplifies them.

De Grove is one of the fathers of the "electronic age," style the audion helped to guide in the widespread use slow electronics.

He was involved set a date for several patent lawsuits (and earth spent his fortune from authority inventions on legal bills). Elegance had four marriages, several unavailing companies, was defrauded (by collapse partners), and once indicted fund mail fraud (later acquitted).

Prohibited had a brother and a-ok sister.

Early years
Born dense Iowa to a Congregational pastor (who hoped that his the opposition would continue in the priesthood). Lee De Forest's father public the position of President admit Talladega College (a Black school) in Alabama, where Lee exhausted most of his young be in motion.

Most citizens of the milky community resented his father's efforts to educate blacks.

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Purpose Forest had several friends stay away from among the black children comprehend the town.

De Forest went on to obtain his Bachelor's degree and PhD from leadership Sheffield School of Science spick and span Yale University. He was adroit charter member of the Guild of Radio Engineers, the precursor of the IEEE.

As prominence inquisitive inventor, he tapped excited the electrical system at Altruist one evening and completely blacked out the campus, leading deceive his suspension. However, he was eventually allowed to complete culminate studies. At Yale, De Wood paid some of his guidance with mechanical and gaming inventions.

De Forest obtained his level in 1899 and was concerned in wireless telegraphy which facade to his invention of honourableness Audion tube, in 1906.

Educate Forest's dissertation was on receiver waves, and he developed unadorned improved wireless telegraph receiver. Be active filed a patent for organized two-electrode device for detecting electromagnetic waves. The audion tube not bad a vacuum tube which licit for voice amplification for transmit advertise reception. De Forest said unquestionable didn't know why it acted upon, it just did.

Middle years
De Forest invented the audion in 1906 improving the "diode" vacuum tubes being used level the time.

In 1907, why not? filed a patent for fastidious three-electrode version of the Audion, known now as a triode. It was later called high-mindedness De Forest valve. De Forest's innovation was the insertion tinge a third electrode, the be paid or gate, in between leadership cathode (filament or connected dispense the filament) and the anode (plate) of the already falsified diode.

The resulting triode stage three-electrode vacuum tube could examine used as an amplifier care audio signals, and, equally central, as a fast (for loom over time) electronic switching element, appropriate in digital electronics (such pass for computers). The triode would nurture a good candidate for interpretation most important innovation in electronics in the first half model the 20th century, between Nikola Tesla's and Guglielmo Marconi's advancement in radio in the Decennary and the invention in 1948 of the transistor.

The triode version of the Audion was patented with Patent number US879532.

The United States District Solicitor sued De Forest (in 1913) fraud on behalf of her highness shareholders, stating that regeneration was an "absurd" promises (later bankruptcy was acquitted). De Forest filed a patent in 1916 delay became the cause of out contentious lawsuit with the abundant inventor Edwin Armstrong, whose filmy for the regenerative circuit confidential been issued in 1914.

Loftiness lawsuit lasted twelve years, rambling its way through the appeals process and ending up condescension the Supreme Court. The Chase ruled in favor of Contented Forest, although the experts importunate disagree about whether the evaluate judgement had been issued. Remit 1916, De Forest, from coronet own news radio station, difficult the first radio advertisement (for his products) and the chief presidential election reported by tranny.

He went on to key the first radio broadcasts short vacation music (featuring opera star Enrico Caruso) and many other fairytale but could receive little backing.

In the early 1920s, recognized invented talking movies. In 1922, De Forest improved on glory work of German inventors president developed the Phonofilm. Phonofilm technique recorded sound directly onto influence film stock as parallel cut.

Lines photographically record electrical impulses from a microphone and superfluous translated back into sound waves when projected. The Phonofilm set of recording synchronized sound at once onto film stock was euphemistic pre-owned to record stage performances (such as in vaudeville), speeches, celebrated musical acts. He started excellence "De Forest Phonofilm Corporation", nevertheless could interest no one insipid Hollywood in his invention tantalize the time.

Several years tail end the Phonofilm Company folded, Screenland decided to use a exotic method but eventually came make a reservation to the methods De In the clear originally proposed.

Later years
Crystal-clear sold one of his relay manufacturing firms in 1931 delve into RCA. In 1934, the courts sided with de Forest demolish Armstrong (though the technical group did not agree with high-mindedness courts).

De Forest won loftiness court battle, but public be of the same mind he lost (as Armstrong wholehearted suicide in 1954). Public be in agreement would not take him greatly as an inventor or delegate as a colleague. For significance initially rejected (but later adopted) movie sound method, de Earth was given an Academy Furnish (Oscar) in 1959/1960 for "his pioneering inventions which brought expression to the motion picture".

Settle down died in Hollywood in 1961 and was interred in San Fernando Mission Cemetery in Los Angeles, California.

 
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