D.c. motor starter with speed discrimination
CA 1065963 A · Owner: Sony Corporation · Inventors: Nikami, Akira; Kuriki, Choei
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a DC motor control circuit there is applied a frequency, responsive starter circuit which can discriminate a frequency of a rotational signal derived from a signal generator attached to the DC motor. The starter circuit includes a monostable multivibrator which stops its operation in case when the frequency of an input signal exceeds a predetermined frequency.
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 November 6, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 6, 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.