Modular lighting control with circulating inductor
CA 1204814 A · Owner: Cornell-Dubilier Electronics, Inc. · Inventors: Pitel, Ira J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is directed to a circuit and a method for efficiently controlling the output illumination level in gas discharge lighting arrangement. Load side control is provided by a timed interval controlled impedance, serially coupled between the ballast and the lamp(s). A circulating inductor coupled in parallel with the, controlled impedance provides a current path between the, power source and the lamps(s) at least during that portion of the AC waveform where the controlled impedance is in a substantially non-conducting state. -17-
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 20, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 20, 2003.
- 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.