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Inventions

Inventions. Short Wave Radio 1919. Short Wave Radios. Dr. Lee De Forest and Gugliemo Marconi invented the Short Wave Radio in 1919. They became know as the “Fathers of Radio.”. The Holland Tunnel 1927. The Holland Tunnel. Built by Clifford M. Holland 1920 to 1927 Cost $54,000,000

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Inventions

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  1. Inventions

  2. Short Wave Radio1919

  3. Short Wave Radios • Dr. Lee De Forest and Gugliemo Marconi invented the Short Wave Radio in 1919. • They became know as the “Fathers of Radio.”

  4. The Holland Tunnel1927

  5. The Holland Tunnel • Built by Clifford M. Holland 1920 to 1927 • Cost $54,000,000 • 100,000 vehicles pass through each day • North tube 8,558 feet South tube 8,371 feet

  6. The Holland Tunnel 1999

  7. Television1928

  8. Television • Vladmir Kosma Zworykin is know as Television’s Modern Father. • Philo Taylor Farnsworth was first to transmit a television image. The image was a dollar sign. $

  9. Color Television • 1925- Zworykin filed a patent for color television which failed. • 1959- Color t.v. received authorization for commercial broadcasting on Jan. 22, 1959.

  10. Helicopters1936

  11. Helicopters • The Focke-Wulf 61 was the first practical helicopter. It solved control problems and reached 122km/h. • Juan de la Cierva’s Gyrocrafts had hinged flapping rotor blades.

  12. Modern Helicopters • Bell AH-1Z • A modern military helicopter with a four bladed main and tail rotor and “fully integrated weapons.”

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