Alternating current controlling system
CA 1075768 A · Owner: Hitachi, Ltd. · Inventors: Mitsui, Nobuo; Maeda, Yasuyuki; Komuro, Katsu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thyristor arrangement is interposed between an AC power source and a load, and the thyristor arrangement is controlled by a signal in synchronism with the AC power source and a control signal thereby to control an electrical power supplied to the load. The signal in synchronism with the AC power source is produced by using a smoothing circuit for smoothing a distorted waveform of the AC power source and means for compensating phase lag due to the smoothing circuit.
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 April 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 15, 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.