Current limiting circuit breaker
CA 1051069 A · Owner: Square D. Company · Inventors: Tharp, James A.; Oster, Clark L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an electromagnetically operable circuit interrupting device comprising an outer molded case a magnetic, core disposed in the outer case a conductor turn disposed in, the outer case and associated with the magnetic core an armature, disposed in the outer case normally in spaced relationship to, the magnetic core and attracted toward the magnetic core upon flow of a predetermined current in the conductor turn an inner, case disposed in the outer case adjacent the armature of an opposite side thereof from the magnetic core wherein the im-, provement consists of an armature pin secured to the armature and having a portion reciprocally mounted in the inner case a, first contact blade having 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
- Granted March 20, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 20, 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.