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Expired Canadian patentCanada

Inrush current start-up circuit for a television receiver

CA 1084159 A · Owner: Rca Corporation · Inventors: Luz, David W.; Fernsler, Ronald E.; Peer, John C.

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

A start-up circuit for a television receiver includes a circuit for rectifying the AC line voltage and a filter for providing a smoothed DC voltage. When the receiver is turned on, an initial interval exists in which inrush current flows into the filter. A magnetically coupled winding of an inductor in the path of the inrush current develops an alternating current potential during the initial interval. This potential is rectified and provides a start-up operating voltage for the television receiver. - 1 -

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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 August 19, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 19, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 5, 1977
GrantedAugust 19, 1980
Term endedAugust 19, 1997
Patent numberCA 1084159 A
Classification (IPC)H04N3/18

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedDec 5, 1977Patent grantedAug 19, 1980Term endedAug 19, 1997

Sources & verification

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