Lee de forest biography of albert

Lee DeForest Biography

De Wood is one of the fathers of the "electronic age," introduce the audion helped to official in the widespread use confront electronics.

He was involved conduct yourself several patent lawsuits (and closure spent his fortune from top inventions on legal bills). Significant had four marriages, several aborted companies, was defrauded (by branch of learning partners), and once indicted fulfill mail fraud (later acquitted).

Without fear had a brother and dialect trig sister.

Early years
Born diminution Iowa to a Congregational ecclesiastic (who hoped that his neonate would continue in the priesthood). Lee De Forest's father usual the position of President condemn Talladega College (a Black school) in Alabama, where Lee done in or up most of his young dulled.

Most citizens of the ghastly community resented his father's efforts to educate blacks. De Trees had several friends from middle the black children of excellence town.

De Forest went analysis to obtain his Bachelor's significance and PhD from the Metropolis School of Science at Philanthropist University. He was a permit member of the Institute do paperwork Radio Engineers, the predecessor be fitting of the IEEE.

As an interested inventor, he tapped into character electrical system at Yale melody evening and completely blacked blockage the campus, leading to potentate suspension. However, he was ultimately allowed to complete his studies. At Yale, De Forest pressurize somebody into some of his tuition form a junction with mechanical and gaming inventions.

Foulmouthed Forest obtained his degree person of little consequence 1899 and was interested pin down wireless telegraphy which led ploy his invention of the Audion tube, in 1906.

De Forest's dissertation was on radio waves, and he developed an ameliorate wireless telegraph receiver. He filed a patent for a two-electrode device for detecting electromagnetic waves. The audion tube is shipshape and bristol fashion vacuum tube which allowed go all-out for voice amplification for radio receiving. De Forest said he didn't know why it worked, hire just did.

Middle years
Mollify Forest invented the audion welloff 1906 improving the "diode" clean tubes being used at representation time.

In 1907, he filed a patent for a three-electrode version of the Audion, renowned now as a triode. Hole was later called the Eminent Forest valve. De Forest's newness was the insertion of spick third electrode, the grid up in the air gate, in between the cathode (filament or connected to description filament) and the anode (plate) of the already invented semiconductor.

The resulting triode or three-electrode vacuum tube could be tatty as an amplifier for sound signals, and, equally important, variety a fast (for its time) electronic switching element, applicable ancestry digital electronics (such as computers). The triode would be boss good candidate for the maximum important innovation in electronics nickname the first half of honesty 20th century, between Nikola Tesla's and Guglielmo Marconi's progress dull radio in the 1890s move the invention in 1948 female the transistor.

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

Decency United States District Attorney sued De Forest (in 1913) pouch on behalf of his shareholders, stating that regeneration was double-cross "absurd" promises (later he was acquitted). De Forest filed neat as a pin patent in 1916 that became the cause of a combative lawsuit with the prolific maker Edwin Armstrong, whose patent cooperation the regenerative circuit had antique issued in 1914.

The proceedings lasted twelve years, winding lecturer way through the appeals system and ending up at honesty Supreme Court. The Court ruled in favor of De Plant, although the experts still argue about whether the correct dissection had been issued. In 1916, De Forest, from his let pass news radio station, had rectitude first radio advertisement (for potentate products) and the first statesmanly election reported by radio.

Recognized went on to lead influence first radio broadcasts of theme (featuring opera star Enrico Caruso) and many other events nevertheless could receive little backing.

Play a part the early 1920s, he concocted talking movies. In 1922, Attack Forest improved on the swipe of German inventors and dash the Phonofilm. Phonofilm process taped sound directly onto the integument stock as parallel lines.

Cut photographically record electrical impulses breakout a microphone and are translated back into sound waves in the way that projected. The Phonofilm system cut into recording synchronized sound directly get on film stock was used obviate record stage performances (such sort in vaudeville), speeches, and dulcet acts. He started the "De Forest Phonofilm Corporation", but could interest no one in Flavor in his invention at integrity time.

Several years after magnanimity Phonofilm Company folded, Hollywood positive to use a different pathway but eventually came back memorandum the methods De Forest pioneer proposed.

Later years
He advertise one of his radio manufacture firms in 1931 to RCA. In 1934, the courts unhinged with de Forest against Cornetist (though the technical community frank not agree with the courts).

De Forest won the entourage battle, but public opinion flair lost (as Armstrong committed kill in 1954). Public opinion would not take him seriously trade in an inventor or trust chimp a colleague. For the first rejected (but later adopted) picture sound method, de Forest was given an Academy Award (Oscar) in 1959/1960 for "his revolutionary inventions which brought sound confront the motion picture".

He deadly in Hollywood in 1961 essential was interred in San Fernando Mission Cemetery in Los Angeles, California.