Device for indicating the short-circuiting of a lightning arrester
CA 1311262 C · Owner: "Ferraz" A French Societe Anonyme · Inventors: Cinquin, Jean-Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In order visually to indicate the existence of a "continuation" current through a lightning arrester, an indicator is associated therewith which is formed by an elastically deformable strip maintained retracted against the capsule by a bolt mechanism associated with an electrical filter which causes fusion of the fusible wire under the effect of a "continuation" current. Once its end is released the strip projects outwardly of the lightning arrester and marks the location of the defective insulation.
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 December 8, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 8, 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.