Lee De Forest (born the August 26th 1873, dead the June 30th 1961) was an inventor with more than 300 patents to its name. De Forest invented, inter alia, the first Triode named the Audion, a Vacuum tube allowing the amplification of an electric signal . De Forest is one of the fathers of the “electronic era” from the big role of its inventions for the diffusion of the electronic .

It conceived a system of reproduction of the sound on the tape even of film called Phonofilm .

It was implied in many lawsuits in connection with its Brevet S and there lost its fortune acquired thanks to its inventions. It was married four times, had a sister and a brother.

Studies

Last years

It sold its company of manufacture of radio with RCA in 1931. In 1934, the courts sliced the business opposing De Forest to Edwin Howard Armstrong (although the technicians were not agreement with this judgment). De Forest gained the legal battle, but lost the public opinion after the suicide of Armstrong in 1954. He was not consequently any more regarded as an inventor by the public, he accepted after being initially rejected into 1959/1960 a Academy Award for his method of recording of the sound for the films, which brought the sound to the cinema and accepted a star on the Hollywood Walk off Famed.

He died in Hollywood in 1961 and was buried in the cemetery San Fernando Mission of Los Angeles.

See too

Some patents

Obvious images in tiff format
  • " Wireless Signaling Device" (directional antenna), filed December 1902, issued January 1904
  • " Oscillation In reply Device" (vacuum tubes detector diode), filed January 1906, issued June 1906
  • " Wireless Telegraph System" (separate transmitting and receiving antennas), filed December 1905, issued July 1906
  • " Wireless Telegraph System" , filed January 1906 issued July 1906
  • " Oscillation In reply Device" (vacuum tubes detector - No grid), filed May 1906, issued November 1906
  • " Wireless Telegraphy" (tunable vacuum tubes detector - No grid), filed August 1906, issued January 1907
  • " Wireless Telegraph Transmitting System" (antenna to couple), filed May 1904, issued January 1908
  • " Space Telegraphy" (increased sensitivity detector - clearly shows grid), filed January 1907, issued February 18, 1908
  • " Wireless Telegraphy"
  • " Wireless Telegraph Tuning Device"
  • " Wireless Telegraph Transmitter" , filed February 1906, issued July 1909
  • " Space Telegraphy"
  • " Space Telephony"
  • " Oscillation In reply Device" (parallel punts in Bunsen flame) filed February 1905, issued December 1910
  • " Wireless Telegraphy" (directional antenna/direction finder), filed June 1906, issued June 1914
  • " Wireless Telegraphy"

Internal bonds

External bonds

  • Stephen Greene' S essay one Lee De Forest: '' Who said Lee de Forest was the " Father off Radio"? (originally published in Farmhouse COM Review, February, 1991)
  • Lee De Forest Biographie one the IEEE History Center
  • National Inventors Hall off Fame' S Lee De Forest
  • Supplements Lee De Forest

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