Modular switch assembly having wiping contacts
CA 1329409 C · Owner: Wilkinson, Ivan E. · Inventors: Wilkinson, Ivan E.; Auxier, Robert W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A switch assembly for a geared limit switch for valve actuators is formed from aligned switch modules. The switch modules includes a pair of switch units, each switch unit having a plunger and a movable contact plate mounted between two springs. As the plunger is driven inward a camming element on the plunger, contacts an edge of an aperture in the movable contact plate forcing the plate to move in a direction perpendicular to the line of plunger travel. The inward motion of the plunger and the camming action continue after the contacts have closed wiping, the contacts mounted on the movable plate across the surfaces of the stationary contacts. When the plunger is released an outer, edge 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 May 10, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 10, 2011.
- 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.