Push-push switch
CA 1113142 A · Owner: Gould Inc. · Inventors: Hempstead, John C.; Di Marco, Bernard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A switch which is opened and closed by successively depressing a manual operating handle is provided with one spring for separating the switch contacts and a separate spring for closing the switch contacts. Interrupting capacity is improved without increasing overall size by utilizing a J-shaped movable contact arm mounted on a pivot located a substantial distance from the movable contact. The closing spring is located adjacent to the arcing or interrupter area. A metal shield is positioned to protect the closing spring from hot arcing gases as they exit from the interrupter area. The speed of instantaneous or magnetic tripping is improved by providing the against coil with at least one …
Read the whole patent
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 November 24, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 24, 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.