Phase-shifting transformer system
CA 2092084 A1 · Owner: Miller, Nicholas W. · Inventors: Miller, Nicholas W.; Larsen, Einar V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A faster, more controllable phase-shifting transformer system (20, 120) is provided, along with a method of retrofitting and upgrading a preexisting system for faster operation and a method of, applying a desired phase shift to the voltage on a polyphase transmission line (22, 122). A phase-shifting transformer set has series and regulating transformers (30 40) coupled together by a, switching network (50). An optional modulator (60 80, 90) modulates, the phase shift voltage about a nominal level established by the switching network (50). A thyristor augmented switching network (250, 350, 450) may have a pair of thyristor valves (206 208;, 406, 408) augmenting a reversing switch (204; 404) …
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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
- Filed June 15, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 15, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 15, 2014.
- 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.