Three-way light dimmer switch
CA 1103750 A · Owner: Power Controls Corporation · Inventors: Wall, Bill R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A three-way light dimmer switch is shown wherein the brightness of a lamp or lamps is controlled by independent light dimmer switches with each dimmer switch having its own light dimmer circuit. Each of the light dimmer switches is vertically actuated with one end of the vertical movement turning the lamp or lamps ON, and the other end of the vertical movement turning the lamp or lamps OFF. Between the limits of vertical movement, either of the light dimmer switches may vary the voltage potential received by the lamp to thereby adjust the brightness of the lamp.
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 June 23, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 23, 1998.
- 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.