Current limiting circuit interrupter
CA 1303653 C · Owner: Howell, Edward Keith · Inventors: Howell, Edward Keith
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pair of main contacts and a pair of arcing contacts are electrically and mechanically interconnected within a current limiting circuit interrupter. A common operator biases the main contacts in a closed contact condition, while simultaneously biasing the arcing contacts to an open condition. A contact driver operating to open the main contacts simultaneously closes the arcing contacts causing circuit current to pass through both the main and arcing contacts. Further displacement of the moving contacts completely directs the circuit current through the arcing contacts for electromagnetic repulsion and arcing within a magnetic structure.
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 16, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 16, 2009.
- 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.