Vacuum switch and electro-magnetic coil assembly therefor
CA 1069159 A · Owner: Hazemeijer B.V. · Inventors: Lipperts, Joseph H.F.G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vacuum switch with reduced interfering fields in the contact gap has an evacuated cylindrical envelope containing two contacts which make electrical contact in the closed condition of the switch and are separated by an electrically insulating gap in the open condition of the switch the gap, being symmetrically disposed with respect to the central axis of the cylindrical envelope. An electro-magnetic coil is disposed coaxially around the envelope and connected in series with the contact elements when the switch is closed producing an axial magnetic field in the region of current passage between the contact elements. One end of the coil is connected to a first conducting joining ring …
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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 January 1, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 1, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.