Emergency elevator governor actuator
CA 2059601 A1 · Owner: Sheridan, William G. · Inventors: Reiskin, Edward D.; Sheridan, William G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a system for tripping the governor rope safety blocks in the event the car motion while the car doors are open, so that the governor rope will set the emergency brakes on the car or counterweight. Governors for both the car and counterweight can be fitted with the system of this invention. The system includes a solenoid which acts on the tripping crank of the standard governor rope safety blocks. The solenoid is connected to the elevator controller and is normally inoperable to affect operation of the governor rope blocks. When the controller senses motion of the car while the car doors are open a, signal is sent to the solenoid and it acts directly on the safety …
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 January 17, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 17, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 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.