Modular electronic temperature controller
CA 1255775 A · Owner: Qualitrol Corporation · Inventors: Foster, Joseph F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and system for controlling the temperature of liquid cooled power transformers. The winding temperature of a transformer winding is electronically computed from the actual top oil temperature and the incremental additional temperature resulting from transformer load current. One curve from a family of curves representing the incremental temperature for various transformers may be selected or programmed by adjustments made which simulate the incremental additional temperature which results from transformer winding current. The total temperature value resulting from the addition of both the top oil temperature and the incremental temperature are used to control indicators, cooling …
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
- Granted June 13, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 13, 2006.
- 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.