Protector for electric circuits
CA 1060068 A · Owner: Mcgraw-Edison Company · Inventors: Fister, Aloysius J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A current-limiting single-element, dual-function, electric fuse has a fusible element with at least one "weak spot" of very small cross section; and the temperature of that weak spot will exceed eighty percent of the melting temperature of the material of the fusible element when that electric fuse operates at its maximum continuous current carrying capacity. Because the temperature of that weak spot is so close to the melting temperature of the material of that fusible element that, weak spot can quickly melt and interrupt the circuit through the electric fuse in response to a low but potentiallyharmful overload. The weak spot can be given a very small cross section, and it can be …
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 August 7, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 7, 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.