Undervoltage release device for circuit breakers
CA 1082266 A · Owner: General Electric Company · Inventors: Castonguay, Roger N.; Jencks, Charles L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a circuit breaker undervoltage release device a, spring powered trip slide is held in a latched position by a latch lever while the plunger of a solenoid is magnetically held in a seated position against the bias of a calibrated return spring. In the event of an undervoltage condition, the spring retracts the plunger causing the, latch lever to release the trip slide which then moves, to trip the breaker. Opening movement of the breaker mechanism first actuates a reset lever to load a reset spring and then returns the slide to its latched position. As the latch lever regains latching control of the slide the reset spring discharges to snap the plunger to itseated position.
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 July 22, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 22, 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.