Manual starter with low voltage release
CA 1072155 A · Owner: Square D. Company · Inventors: Gribble, Joseph J.; Karch, Walter C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A manually operated snap acting switch having contacts in a circuit connecting an electric source to an electric load. The switch has contacts operated by a toggle mechanism and includes elements and mechanisms for causing the levers of the toggle mechanism to move to a tripped position and the contacts of the switch to pen whenever the current in the circuit exceeds a predetermined value or in event of a power failure of the source. The elements and mechanism causing the movement of the levers to the tripped position and an opening of the circuit in event the source has a power failure include a spring-biased lever, a solenoid, which is continuously energized by …
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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 February 19, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 19, 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.
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.