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Expired Canadian patentCanada

Generator load response control

CA 1189903 A · Owner: General Motors Corporation · Inventors: Munden, Curtis D.; Sheldrake, Leonard J.; Kirk, Thomas E.

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Abstract From the Canadian patent

Abstract of the Disclosure A voltage regulating system for a generator that supplies the battery and electrical loads on a motor vehicle. The system includes a load response control for detecting whenever a substantial electrical load is applied to the generator tending to cause a drop in generator output voltage and when such a condition is detected field current is controlled to gradually increase field current from some value. The load response control includes means for storing an electrical signal that corresponds to generator field current and for utilizing this stored value to set generator field current at a value corresponding to a field current that occurred just prior to the …

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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 July 2, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 2, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 18, 1983
GrantedJuly 2, 1985
Term endedJuly 2, 2002
Patent numberCA 1189903 A
Classification (IPC)G05F1/40 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedApril 18, 1983Patent grantedJuly 2, 1985Term endedJuly 2, 2002

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