Motor control circuit
CA 1283948 C · Owner: Siemer, Dennis K. · Inventors: Siemer, Dennis K.; Hastings, John D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A motor control circuit comprising a switching circuit which controls the supply of power from a source thereof to a motor responsive to a control signal and a, speed control circuit which generates the control signal. The speed control circuit can vary the motor speed cyclically, operating as an stable multi-vibrator. An overload protection circuit detects the occurence of a current overload condition and either reduces to a low level the power delivered to the motor or inhibits the switching circuit's operation altogether. 0178h
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 May 7, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 7, 2008.
- 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.