Ground fault protector with interchangeable rating plug
CA 1079357 A · Owner: Westinghouse Electric Corporation · Inventors: Ellsworth, James P.; Wilson, John T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A self-powered self-contained ground fault protective device including a current monitor an electronic, circuit for amplifying the output of the current monitor a, relay connected to the amplifying circuit and adapted to operate whenever ground fault current through the current monitor rises above a predetermined level and an interchange, able rating plug including means for activating a circuit board switch. The current monitor, amplifying circuit and, relay are all supported and enclosed by a molded insulating housing. The rating plug is inserted into a socket on the exterior of the housing.
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 10, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 10, 1997.
- 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.