Cable mounted capacitively-coupled circuit condition indicating device
CA 1264810 C · Owner: Schweitzer, Edmund O. Jr. · Inventors: Schweitzer, Edmund O. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A device for indicating a circuit condition such as the occurrence of a fault current in a high voltage conductor from which the indicator device is suspended includes a housing having at the upper end thereof a pair of outwardly projecting cable engagement members. The engagement members are formed of a resilient insulating material and each include an outwardly projecting base portion and an inwardly projecting end portion which engages and holds the cable against the rear wall of the housing. Operating power for the indicator device is derived from the potential gradient of the electric field surrounding the conductor by means of a metallic plate positioned …
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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 23, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 23, 2007.
- 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.