Push button switch illuminated by light emitting diodes for use with elevators
CA 2115709 A1 · Owner: Murphy, James L. · Inventors: Murphy, James L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A push button switch provides a visual switch actuation acknowledgement signal when actuated. The switch includes an end ring which extends through a cover plate. A push button extends into the end ring and has a lens cap which is exposed to a switch operator at a front surface of the cover plate. The push button also has a plurality of plungers which extend rearwardly through an adapter to actuate an electrical switch mounted on a switch block. The end ring the push button, the adapter and the switch block are retained on a pair of studs extending from a rear surface of the cover plate by a pair of nuts. A light reflector is positioned between the push button and the adapter and has a …
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
- Filed February 15, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 15, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 15, 2016.
- 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.