Mechanical television: Difference between revisions

All-electronic television, first demonstrated publiclyin September 1927 in [[San Francisco]] by [[Philo Farnsworth]], and then publicly by Farnsworth at the [[Franklin Institute]] in [[Philadelphia]] in 1934, andwas firstrapidly usedovertaking formechanical broadcastingtelevision. inFarnsworth's 1936,system was quicklyfirst advancingused pastfor thisbroadcasting pointin 1936, reaching 400 to more than 600 lines with fast field scan rates, inalong thewith nextcompeting fewsystems decadesby [[Philco]] and [[Allan B. DuMont]]. The last mechanical television broadcasts ended in 1939 at stations run by a handful of public universities in the United States. In 1939, [[Radio Corporation of America|RCA]] paid Farnsworth $1 million for his patents after ten years of litigation, and RCA began demonstrating all-electronic television at the [[1939 World's Fair]] in [[New York City]].