Circuit arrangement for adjusting the operating voltage of high-pressure gas discharge lamps
CA 1256935 A · Owner: N.V.Philips'Gloeilampenfabrieken · Inventors: Ganser, Hans-Gunther; Stormberg, Hans-Peter; Schafer, Ralf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PHD 84-076 11, ABSTRACT:, In a circuit arrangement for adjusting the operating voltage of high-pressure gas discharge lamps to a given nominal value, comprising a controllable current limiter arranged in series with the lamp and an adjustment circuit (3) controlling the latter whose, output signal is determined by the difference between a given desired value determining the nominal lamp operating voltage and an actual value dependent upon the instantaneous lamp operating voltage, there is arranged parallel to the lamp (1) a heating element (5) which is, in thermal contact with a temperature-dependent element (6) which produces the actual voltage dependent upon the instantaneous lamp …
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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 July 4, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 4, 2006.
- 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.