Talk:Iconoscope
Date of invention
There was a major error in the article. Although Vladimir Zworykin invented an electronic television tube in 1923, it was not an iconoscope, which is what he dubbed his 1931 tube. The difference was that his 1923 tube used a two-sided plate, with the lens focusing the image on photoelectric mosaic the front side of the plate, and the electronic beam sweeping the back side of the plate. The 1931 iconoscope used a single-sided target, with the electronic beam scanning the same side covered with the photoelectric surface. — Walloon (talk) 22:58, 14 March 2008 (UTC)
Moreover it is said that the 1923 Zworykin's patent was never granted. Please read the file: United States Patent Office 2,141,059, it says that Zworykin filed a patent for a television system on December 29, 1923, and that this patent was issued on December 20, 1938. The patent was delayed, but it was granted at the end. Read as well the file: United States Patent Office 1,691,324, its is a Zworykin's patent for a [color] television system filed on July 13, 1925, and issued on November 13, 1928. —Preceding unsigned comment added by 189.216.253.251 (talk) 01:14, 10 March 2009 (UTC)
Real Inventor: Tihanyi vs. Zworykin
According to UNESCO WORLD HERITAGE Hungarian Kálmán Tihanyi invented the full electric TV broadcast sytem in 1926 (8 years before Zworykin), its name was radioscope , and iconoscope was a part of it. Thanyi's patent 8 years older. Tihanyi won all litigations against Zworykin [!!!] in US. After that Zworykin was no more than a successful widespread contumacios urban legend.
"Memory of the World UNESCO's programme aiming at preservation and dissemination of valuable archive holdings and library collections worldwide Advanced Search
Documentary heritage concerning Hungary and recommended for inclusion in the Memory of the World International Register Hungary - Kalman Tihanyi’s 1926 Patent Application "Radioskop"
Read detailed facts and events: http://www.scitech.mtesz.hu/52tihanyi/history/tihanyi/index.htm
http://portal.unesco.org/ci/en/ev.php-URL_ID=4813&URL_DO=DO_TOPIC&URL_SECTION=201.html —Preceding unsigned comment added by 89.223.128.52 (talk) 06:23, 16 August 2008 (UTC)
- UNESCO's "Memory of the World" makes no such claim. The document referenced above is only "recommended for inclusion in the Memory of the World International Register". (Emphasis added.) Furthermore, Tihanyi’s U.S. patents (#2,133,123 and #2,158,259) only address improvements in the display and camera tubes, and make no reference to improvements in the radio transmission or reception of television signals, much less invention of "the full electric TV broadcast sytem" (sic).
- Zworykin headed the Television Development Department at RCA, which spent nearly two decades and several million dollars refining a primitive system into a commercially viable consumer product. There's ample evidence that Zworykin was less than scrupulous in his early work - "borrowing" from the likes of Farnsworth and Tihanyi - but that certainly doesn't negate his work or that of his team at RCA and their contribution to the development of modern television. The notion that Zworykin's standing is merely an "urban legend" is just plain silly. : D
- Cheers, Rico402 (talk) 05:39, 1 January 2009 (UTC)
It is interesting to compare the patent U.S. 2,158,259 filed by Tihanyi on June 10 1929 (filed in Germany on june 11, 1928) and the (iconoscope) patent U.S. 2,021,907 filed by Zworykin on November 13, 1931. It is quite natural to conclude that Zworykin used Tihanyi's ideas like scanning with an electron beam the same side covered with the photoelectric surface, and so placing the electron emitter in an angle with respect to the optics; even if we consider that RCA bought Tihanyi's patents. But the author of the article must clarify which where the ideas borrowed by Zworykin from Farnsworth. Wikipedia file on Farnsworth textually says: "The U.S. Patent Office rendered a decision in 1935 that the "electrical image" of Farnsworth's image dissector was not in Zworykin's inventions". —Preceding unsigned comment added by 189.216.171.103 (talk) 01:38, 10 March 2009 (UTC)
Rico, That was your standpoint in January, but you educated quite a lot until Juni :) And now, you know that iconoscope means the technology of charge storage, wich was absolutly unknown until Tihanyi. Tihanyi invented and publicated the storage principle in 1924, and he patented his idea on March 1926. HAve you ever seen the 1923 patent of Zworykin? No, because it was no Iconoscope, it based on very different technology, and ironically it didn't work :))))--Celebration1981 (talk) 10:14, 3 June 2009 (UTC)
- What was my "standpoint"? I don't know what you're talking about.
- The 1935 U.S. Patent Office decision says "the 'electrical image' of Farnsworth's image dissector was not in Zworykin's inventions". In other words, the patent office ruled against RCA in its infringement suit against Farnsworth because it concluded that the technology of the image dissector was not invented by Zworykin (or RCA). Since it "was not in Zworykin's inventions", RCA could not claim priority. Rico402 (talk) 20:49, 3 June 2009 (UTC)
What would have happend in the history of Television, if Zworykin or Farnsworth had not was born? Nothing. Their attempts were backward blind-alleys in the history of Television. --Celebration1981 (talk) 10:11, 4 June 2009 (UTC)
Two Historical Notes
Maybe the first totally electronic video camera tube was invented in France by Edvard-Gustav Schoultz in 1921. He filed the French patent FR-539-613 on August 23, 1921. The patent was accepted on April 5, 1922, and published on June 28, 1922. You can find a copy of the original document in the web page [[1]]
The Image Dissector was also invented in Germany by Max Diekmann and Rudolf Hell in 1925. They filed the German patent DE-450-187 on April 5, 1925. The patent was accepted on September 15, 1927, and published on October 3, 1927. You can find a copy of the original document in the web page [[2]]