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Expired Canadian patentCanada

Oscillating flux transformer

CA 1263159 C · Owner: Westinghouse Electric Corporation · Inventors: Del Vecchio, Robert M.; Specht, Theodore R.

CIPO record

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

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Abstract From the Canadian patent

11 51,729, ABSTRACT OF THE DISCLOSURE, An oscillating flux transformer for transforming relatively large blocks of electrical power at power frequencies in direct accordance with the turn ratio of toroidal primary and secondary windings. The transformer includes a core-coil assembly having a poloidal winding in addition to primary and secondary toroidal windings with, the poloidal and toroidal windings being disposed on a magnetic core which is in the form of a closed loop or torus. Direct current in the poloidal winding establishes an equilibrium position of a saturation induction phasor. The AC flux produced by the toroidal primary winding combines vectorially with the DC flux to cause …

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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 November 21, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 21, 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.
FiledNovember 27, 1986
GrantedNovember 21, 1989
Term endedNovember 21, 2006
Patent numberCA 1263159 C
Classification (IPC)H01H85/02 +2 more

Timeline

Timeline From CIPO dates

1987198919911993199519971999200120032005Application filedNov 27, 1986Patent grantedNov 21, 1989Term endedNov 21, 2006

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