Carbon brush holder utilizing a worn brush detector
CA 2022597 A1 · Owner: Thompson, Edward David · Inventors: Pipkin, James Robert; Thompson, Edward David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
55,289, ABSTRACT OF THE DISCLOSURE, A worn brush detector 43 for an electric generator. The worn brush detector 43 comprise a contactor strip 55 of electrically-conductive material secured to and insulated from a brush holder 28 the, contactor strip 55 having a plurality of fingers 52 projecting downward from the strip 55 and generally perpendicular thereto, the fingers 52 being disposed adjacent to a hole 62 in the brush holder 28 and electrically insulated therefrom. An electrically insulated knob 61 on the opposite end of the fingers 52 projects through the hole 62 such that when a brush 25 is inserted into the holder 28 the corresponding finger 52 is pushed away from the holder by the …
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 August 2, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 2, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 2, 2012.
- 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.