1933 in American television
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This is a list of American television-related events in 1933.
Events
- February 15 - Final episode for the horror anthology television series The Television Ghost. The series primarily focused on ghost stories.[1]
- April - In April 1933, the American inventor Philo Farnsworth submitted a patent application entitled Image Dissector, but which actually detailed a CRT-type camera tube.[2] This is among the first patents to propose the use of a "low-velocity" scanning beam and RCA had to buy it in order to sell image orthicon tubes to the general public.[3] However, Farnsworth never transmitted a clear and well focused image with such a tube.[4][5]
- June- A research group at the Westinghouse Electronic Company headed by the American inventor Vladimir K. Zworykin presented the iconoscope to the general public in a press conference in June 1933,[6] and two detailed technical papers were published in September and October of the same year.[7][8] Unlike Philo Farnsworth's image dissector, the Zworykin iconoscope was much more sensitive, useful with an illumination on the target between 4ft-c (43lx) and 20ft-c (215lx). It was also easier to manufacture and produced a very clear image. The iconoscope was the primary camera tube used in American television broadcasting from 1936 until 1946, when it was replaced by the image orthicon tube.[9][10]
- October - In his continued attempts to improve his image dissector, the inventor Philo Farnsworth introduced a multipactor in October 1933.[11][12] Farnsworth's image dissector was the first practical version of a fully electronic imaging device for television.[13] It had very poor light sensitivity, and was therefore primarily useful only where illumination was exceptionally high (typically over 685 cd/m2).[14][15][16]