Current transformer and method for correcting asymmetries therein
CA 2326798 A1 · Owner: Tiemann, Jerome J. · Inventors: Baertsch, Richard D.; Tiemann, Jerome J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A current transformer (10) for a ground fault circuit breaker used on a circuit, having at least one line conductor (12) and a neutral conductor (14) includes a, toroidal core (16) having a circular opening defining a center point and a multi-turn winding (18) wound on the core (16). A first guide member (20) is disposed on one side of the core (16), and a second guide member (20) is disposed on another side of the core (16). The first and second guide members (20) each have a hole (26) for receiving the line conductor (12) and a hole (26) for receiving the neutral conductor (14) formed therein. The guide members (20) thus position the conductors (12 14) with respect to the core, (16). …
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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 November 23, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 23, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 23, 2022.
- 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.