Switching device
CA 1190310 A · Owner: Naimer, Hubert L. · Inventors: Naimer, Hubert L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A b s t r a c t, A switching device for opening and closing electrical circuits, in which, parallel to each contact located in the main circuit to be switched of a magnet-, controlled switchgear, an electronic switch and a contact serving as an isolator, of a further magnet-controlled auxiliary switchgear are connected in series and there, is a control device which connects through the electronic switch before any change in switching state of the magnetcontrolled switchgear located in the main circuit and which then blocks it again, the contacts of the auxiliary switchgear which are in series with the electronic switch being closed, there being a central control unit which has for each of …
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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 July 9, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 9, 2002.
- 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.