Technikatörténeti szemle 20. (1993)

TANULMÁNYOK - Tihanyi Glass, Katalin: The Iconoscope: Kalman Tihanyi and the Development of Modern Television

picture tube that had been developed by Zworykin"! Studying the patents, one can conclude that while Zworykin also describes this feature, he states that he does not quite understand how it works. 39. U.S. Pat. 2,246,283, assigned to Westinghouse. 40. U.S. Pat. 2,157,048, assigned to RCA. The fact that the previous filing of May 1, was assigned to Westinghouse would Indicate that Zworykin's relationship with RCA was finalized at some time falling between these two dates. 41. See U.S. Patent Office archival file re. 2,246,283, June 8, 1936 letter from the examiner, respective archival file re. 2,157,048, October 17, 1931 letter from the examiner. 42. J. H. Udelson: The Great Television Race. A History of the American Television Industry, Alabama. 1982, pp. 85. 43. A. Abramson: The History of Television, 1800 to 1941, Jefferson, North Carolina, 1987, pp. 167. 44. Occupyng the second half of a patent specification, „claims" delineate each feature of a patent application that the inventor considers an innovation. „Claims" then have to be consistent with the description contained in the specification. 45. U.S. Pat. 2,021,907/November 13, 1931. 46. Archival files, U.S. Patent Office, Washington, D.C., 2,021,907, Paper No. 15, letter from the examiner. 47. A. Abramson: the History of Television, 1880 to 1941, Jefferson, North Carolina, 1987, pp. 214. 48. U.S. Patent Office, Official Gazette, Apr. 30, 1935, Class 21. 49. Archival file, U.S. Patent Office, Washington, D.C., 2,158,259. 5Q. Archival file, U.S. Patent Office, Washington, D.C., 2,021,907. 51. See Patent Interference No.64027, Farnsworth v. Zworykin, Transcript of final hearing, April 24, 1934. This document shows that the Zworykin team presented two different theories as to how the 1923 Zworykin device operated, claiming the two concepts were esentially the same. The judge, apparently not persuaded by the testimonies or the introduced evidence, declared that the witnesses described „two entirely different inventions," the first operation being ..entirely different from that now alleged...and which is necessary to produce the electric charge image". TIHANYI GLASS KATALIN: AZ IKONOSZKÓP: TIHANYI KÁLMÁN ALKOTÓ SZEREPE A TELEVÍZIÓ MEGVALÓSULÁSÁBAN Ismeretes az, hogy az ikonoszkópot, vagyis a töltéstárolás elvén működő televíziót az irodalom az 1930-as évek óta szinte egyhangúan V. K. Zworykin találmányaként tartotta számon.