High tension vacuum switches
CA 1108675 A · Owner: Hazemeijer B.V. · Inventors: Griesen, Bertus; Gundlach, Harry C.W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A high tension vacuum switch comprising two, relatively axially movable switching contacts and two annular shielding electrodes, of which each one is associated and electrically coupled with a respective one of said switching contacts and projects slightly beyond the contact surface of said contact in the direction towards the other switching contact. At least one of the shielding electrodes is capacitively coupled with its respective switching contact so as to add the advantage of much smaller overall dimensions for a switch of this kind. At least one of the switching contacts is supported by a contact rod and between said contact rod and the respective shielding electrode, radially seen, …
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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 September 8, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 8, 1998.
- 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.