Current limiting circuit breaker
CA 1048578 A · Owner: Square D Company · Inventors: Dickens, Richard T.; Khalid, Joseph M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electric circuit interrupting device comprising a molded case, a pair of separable contacts in the case an, elongated movable contact arm to carry one of said contacts between a contact open and contact closed position a magnetic, core structure in the case substantially completely encircling the contacts and encircling a substantial current carrying portion of said elongated movable contact arm which extends rearwardly of said contacts, said magnetic core including a pair of spaced apart upright magnet walls one of said magnet, walls being on one side of said contacts and the other of said magnet walls being on the opposite side of said contacts said, walls extending upright in the same …
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 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 13, 1996.
- 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.