Once in the U.S., V.Zworykin found work in Pittsburgh, where he eventually had an opportunity to engage in television experiments. He summarized the resulting invention in two patent applications.
Vladimir Zworykin described cathode ray tubes as both transmitter and receiver.
The demonstration given by V. Zworykin in late 1925 or early 1926, was far from a success but Zworykin continued his efforts to perfect his system.
Having developed the prototype of the receiver by December 1929, Zworykin met David Sarnoff, who eventually hired him and put him in charge of television development for RCA ( the Radio Corporation of America) at their newly established laboratories in Camden, New Jersey.
The move to the laboratories occurred in the spring of 1930 and the difficult task of developing a transmitter could begin. There was an in-house evaluation in mid-1930, where the kinescope performed well (but with only 60 lines definition), and the transmitter was still of a mechanical type. A "breakthrough" would come when the Zworykin team decided to develop a new type of cathode ray transmitter, one described in the French and British patents of 1928 priority by the Hungarian inventor Kalman Tihanyi whom the company had approached in July 1930, after the publication of his patents in England and France. This was a curious design, one where the scanning electron beam would strike the photoelectric cell from the same side where the optical image was cast. Even more importantly, it was a system characterized by an operation based on an entirely new principle, the principle of the accumulation and storage of charges during the entire time between two scansions by the cathode-ray beam.
It was decided that the new camera tube would be named Iconoscope. The system was ready to be launched at the end of 1934, a contract had of course been signed with the Hungarian inventor for the purchase of his patents. In early 1935, the new tube was introduced in Germany. It was soon developed there, with some improvements, and was successfully used at the 1936 Berlin Olympic Games.
Vladimir Zworykin described cathode ray tubes as both transmitter and receiver.
The demonstration given by V. Zworykin in late 1925 or early 1926, was far from a success but Zworykin continued his efforts to perfect his system.
Having developed the prototype of the receiver by December 1929, Zworykin met David Sarnoff, who eventually hired him and put him in charge of television development for RCA ( the Radio Corporation of America) at their newly established laboratories in Camden, New Jersey.
The move to the laboratories occurred in the spring of 1930 and the difficult task of developing a transmitter could begin. There was an in-house evaluation in mid-1930, where the kinescope performed well (but with only 60 lines definition), and the transmitter was still of a mechanical type. A "breakthrough" would come when the Zworykin team decided to develop a new type of cathode ray transmitter, one described in the French and British patents of 1928 priority by the Hungarian inventor Kalman Tihanyi whom the company had approached in July 1930, after the publication of his patents in England and France. This was a curious design, one where the scanning electron beam would strike the photoelectric cell from the same side where the optical image was cast. Even more importantly, it was a system characterized by an operation based on an entirely new principle, the principle of the accumulation and storage of charges during the entire time between two scansions by the cathode-ray beam.
It was decided that the new camera tube would be named Iconoscope. The system was ready to be launched at the end of 1934, a contract had of course been signed with the Hungarian inventor for the purchase of his patents. In early 1935, the new tube was introduced in Germany. It was soon developed there, with some improvements, and was successfully used at the 1936 Berlin Olympic Games.
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