Elevator control system
CA 1056076 A · Owner: Mitsubishi Denki Kabushiki Kaisha · Inventors: Satoh, Tsuyoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pulse generator supplies to a logic unit pulses whose number is determined by a quantity of movement of an elevator car. The logic unit effects the algorithm and comparison of the quantity of movement of the car and a command quantity of movement of the car to produce a speed signal which, in turn, controls the car. The pulses are also stored in a memory and an electric source energizes the memory and the pulse generator for a predetermined time after the occurrence of an emergency.
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 5, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 5, 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.