Electrical circuit breaking device
CA 1248571 A · Owner: University Of Sydney · Inventors: Stokes, Anthony D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
AN ELECTRICAL CIRCUIT BREAKING DEVICE" ABSTRACT OF THE DISCLOSURE, A circuit breaking device which comprises an elongate conductive element located within a casing and connected in series with a helical spring. The spring exerts a tensile load on the conductive element, and the conductive element is formed from a material such as copper which will yield and fracture mechanically under the influence of the tensile load when the conductive element is subjected to a current induced heating level greater than a predetermined level.
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 January 10, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 10, 2006.
- 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.