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Expired Canadian patentCanada

Magnetizing current switch

CA 1063145 A · Owner: Westinghouse Electric Corporation · Inventors: Dropik, Sylvester J.; Meyer, Jeffry R.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A magnetizing current switch particularly adaptable for use in gas insulated substations comprising a sealed housing including two spaced-apart electrical conductors and a movable contact for electrically connecting or disconnecting the electrical conductors. A rotatable drive shaft is coupled to drive means, which translate the rotation of the drive shaft to a generally straight-line motion and the, straight-line motion moves an insulating rod which is secured to the contact, thereby positioning the contact either in contact with both conductors, or spaced apart from at least one of them. The drive means includes a pair of support members and a pair of spaced-apart pivot links pivotally …

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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 September 25, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 25, 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.
Filed—
GrantedSeptember 25, 1979
Term endedSeptember 25, 1996
Patent numberCA 1063145 A
Classification (IPC)H01H33/64 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedSep 25, 1979Term endedSep 25, 1996

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.