Induction motor brake circuit
CA 1061403 A · Owner: Dewhurst And Partner Limited · Inventors: Minns, George E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention concerns an electrical drive arrangement in which a polyphase electric motor can be braked by connecting the capacitor across the motor windings. A test system is provided to check that the capacitor is in a condition to effect braking, and the arrangement is such that the motor cannot be operated unless the test system indicates the capacitor is in a condition to brake the motor.
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 August 28, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 28, 1996.
- 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.