Talk:Image dissector

This entry should be moved to the Video camera tube page and intigrated there in.

he was born in utah not idaho. fixed it. Arc88 19:10, 10 April 2007 (UTC)

But he was a teenage farmboy from Idaho. That is, Idaho is where he was a teenage farm boy. Is there a better way to say it? Putting his place of birth here is at least as misleading as the original. Dicklyon 19:58, 10 April 2007 (UTC)

How it worked

discussion copied to here from User talk:Dicklyon#Image Dissector for continuation, by User:Dicklyon:

You recently reverted my edit of the description of the Farnsworth Image Dissector saying that it sounded like the operation of Zworykin's design; it does, because they are fairly similar. Please consult the patent application referenced at the bottom of the page which clearly states that the primary method of scansion is detection of the surplus electrons deflected back to the electron gun. Gordon —Preceding unsigned comment added by 130.159.248.36 (talk) 13:11, 15 December 2008 (UTC)

But you didn't cite a source. It would be best to cite a secondary source that explains it, rather than give your own interpretation of the patent. Dicklyon (talk) 16:00, 15 December 2008 (UTC)

I agree, sources should be cited. I wasn't however trying to improve the article, I was trying to correct factual inaccuracies I had noticed in my research. I would write a better article if I had the time. "Interpretation" aside, the account I gave was a summary of the description contained in the patent, the current revision as reverted by you is wrong. I fail to see why citing a secondary source as you suggest would be beneficial; I would then be giving my interpretation of someone else's interpretation of the patent. I agree that my revision is not necessarily any better in terms of an acceptable article for wikipedia, but it was at least true. Arbitary reversion by you to a false description is bewildering. Gordon 78.105.184.134 (talk) 21:37, 15 December 2008 (UTC)

Don't be bewildered. See WP:BRD; you were bold, I reverted because I doubted the correctness based on the lack of sourcing, now we're discussing it. My revert was to get your attention to the problem of making your change verifiable, so that if it is it will stick. Now that you say it's pretty much straight from the patent, it should be easy to simply cite that. But also see Wikipedia:RS#Primary.2C_secondary.2C_and_tertiary_sources about why secondary sources are preferred. Dicklyon (talk) 23:03, 15 December 2008 (UTC)

So I've been looking in Farnsworth's patent filed in 1927, and can't find where you got this stuff. The one you were looking at was the 1933 filing, by which time he had incorporated a storage feature like Zworykin's apparently. So it is my impression that your description does not apply to the original image dissector. If we had a secondary source to help put all this into perspective, that could be very useful. Dicklyon (talk) 01:41, 16 December 2008 (UTC)

I am very sorry to say that you are quoting a wrong U.S. patent file. The original Image Dissector was presented by Farnsworth in U.S. patent file 1,773,980 filed on January 7, 1927, and there is not electronic gun involved there. The original Iconoscope was presented by Zworykin in U.S. patent file 2,021,907 filed on November 13, 1931. Finally the Farnsworth patent U.S. 2,087,683 that you are presenting at the end of your file referes to an improved version of the Image Dissector and was filed on April 26, 1933. Thus the Farnsworth's 1933 patent looks like the Iconoscope because Farnsworth was using Zworykin's 1931 work, but the original patents for the Image Dissector (1927) and Iconoscope (1931) are competely different.

Finally Farnsworth did not earn income from the production of the Iconoscope, that is not even mention in Farnsworth's wikipedia page. RCA indeed paid in 1939 one million dollars for Farnsworth's patent on the Image Dissector because they needed the patent rights to produce their Image Orthicons (built by Rose, Law, and Weimer in 1944-1945). The image part (photocatode and target) in the Image-Orthicon is indeed a Farnsworth's Image-Dissector. —Preceding unsigned comment added by 148.247.186.142 (talk) 21:49, 10 March 2009 (UTC)

Two Historical Notes

One of the first all-electronic video camera tubes 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]]

--134.153.204.160 (talk) 15:50, 24 July 2009 (UTC)