Circuit to limit surges into dc-operated lamp
CA 1313535 C · Owner: Masaki, Kazumi · Inventors: Masaki, Kazumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
61-111257, Abstract of the Disclosure, Disclosed is a circuit to limit surges into dcilluminated lamp, comprising a rectifier circuit having a smoothing means, the output terminal being connected with a lamp; an inductor connected with the input terminal of the rectifier circuit; a surge-limiting means connected in series with the lamp; and a switching means having the main current path connected in parallel with the surge-limiting means said, switching means becoming conductive when the filament of the lamp is warmed up.
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 February 9, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 9, 2010.
- 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.