Control system and method for switching pivot stands in a tandem rolling mill
CA 2074119 A1 · Owner: Aeg Westinghouse Industrial Automation Corporation · Inventors: Bolkey, Harold B.; Morrow, Thomas J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a master speed regulator system for a multistand rolling mill, a control system and method for switching a pivot stand via a bumpless transfer back and forth from the second stand to the last stand depending on the phases of the mill and while the mill is operating. A microprocessor is used for recalculating the master speed reference B1, the integral values for the master speed reference integral controller, and the outputs for the tension/automatic gauge integral controllers for the new pivot state based on conditions of the previous pivot state.
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 July 17, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 17, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 17, 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.