Method and apparatus for controlling lights and other devices
CA 2283941 A1 · Owner: Bogdan, Alexei · Inventors: Bogdan, Alexei
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dimmer for dimming gas discharge and incandescent lamps can be installed in place of a standard wall-mounted light switch and connected to existing wiring. The dimmer has a switch coupling one or more full wave bridge rectifiers to a main AC source and to existing power wires running through the wall to the fixture. The bridge rectifiers are controlled by the dimming switch such that either the normal AC source waveform is transmitted over the power wires, or a full wave positively or negatively rectified AC waveform is transmitted, or else no voltage is transmitted. At the fixture the , transmitted power waveform is applied to the lamp power terminal of the lamp or ballast as …
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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
- Filed January 19, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 19, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 19, 2021.
- 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.