Improved core-form transformer
CA 2132709 C · Owner: Girgis, Ramsis S. · Inventors: Kennedy, William N.; Pandza, Carl M.; Girgis, Ramsis S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved core-form transformer (20) is disclosed. The core-form transformer (20) includes a c-wrapped ribbon conductor (32) with opposing wide sides and opposing thin sides. The c-wrapped ribbon conductor (32) is wound around a core (24) to form a plurality of coil sections (22). Adhesive is applied directly to one of the wide sides of the ribbon conductor (32) to form a strong mechanical coupling within the coil sections (22). A novel transposing fold (50 52, 30, 44) of the ribbon conductor (32) is employed to create coil transpositions. The core-form transformer (20) of the invention reduces circulating current losses while utilizing only a small number of transposing folds generally …
Read the whole patent
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 March 24, 1993 and granted January 14, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 24, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 24, 2015.
- 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.