Elevator system
CA 1164114 A · Owner: Westinghouse Electric Corporation · Inventors: Husson, Alan L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
49,235, ABSTRACT OF THE DISCLOSURE, An elevator system including an elevator car and control apparatus for controlling its speed including, a speed pattern generator. The speed pattern generator provides a running speed pattern, and a slowdown speed pattern, wherein the deceleration rate of the slowdown speed pattern may be different than the acceleration and deceleration rates of the running speed pattern. Bumpless transfer from the running speed pattern to the slowdown speed pattern is achieved by forcing the slowdown speed pattern to match the magnitude of the running speed pattern just prior to transfer, and by initiating transfer when the rate of change of the running speed pattern …
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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
- Granted March 20, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 20, 2001.
- 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.