Electron gun having a two piece screen grid electrode means
CA 1237464 A · Owner: Rca Corporation · Inventors: Chen, Hsing-Yao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
RCA 79,987, Abstract of the Disclosure An inline electron gun for a cathode-ray tube includes an improved beam forming region comprising three cathodes, a control grid and a novel screen grid electrode means, the latter comprising two spaced apart metal members. In one embodiment, the first member closest to the control grid is relatively thick and has three slots formed in one surface thereof facing away from the control grid. Circular apertures are formed within the slots and extend through the body of the first member. The second member has three circular apertures therethrough aligned with the circular apertures in the first member. When a dynamic signal is superimposed on the DC bias …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted May 31, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 31, 2005.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.