Low noise electron gun
CA 1212983 A · Owner: Koninklijke Philips Electronics N.V. · Inventors: Rao, Nidamboor V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
14, ABSTRACT:, Disclosed is an electron gun comprising a cathode, a first apertured anode spaced from said cathode and operated at a potential of between 5 and 30 volts positive with respect to the cathode. The gun further comprises a second apertured anode spaced from the first anode and operating at a potential of between 100 and 400 volts positive with respect to the cathode to produce a lens field in the region between the anodes which focusses the electrons emitted from the cathode at a crossover therebetween. The cross-section of the beam produced by the gun is determined by the size of the aperture in the second anode and the beam current may be varied by changing the voltage on the …
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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 October 21, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 21, 2003.
- 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.