Elevator system
CA 1045991 A · Owner: Westinghouse Electric Corporation · Inventors: Solymos, Frederick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An elevator system including an elevator car mounted for vertical movement in a building hoistway suitable control and drive means, and a buffer-switch combination located in the pit of the hoistway the switch, being electrically connected to the control means. An annular member is mounted about the buffer plunger so that it is free to rotate. A cable is connected between the annular member and the switch so that the switch is in one condition when the buffer plunger is restored and another condition when the plunger is retracted.
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 January 9, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 9, 1996.
- 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.