Determination of the number of persons entering and leaving an elevator car
CA 2076154 C · Owner: Roschier, Nils-Robert · Inventors: Roschier, Nils-Robert; Siikonen, Marja-Liisa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a method for determining the number of passenger transfers in an elevator car monitored by an elevator and group control systems under the supervision of a group control. The method comprises continuously measuring a car load during a stoppage for obtaining a load data signal. The load data signal is filtered, recorded and the number of load changes taking place is determined therefrom, so that the number of persons having entered and having left the elevator car is calculated. The car load data measured with an analogous weighting device is converted into a digital car load signal which may be digitally filtered. The data obtained with this method may be …
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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
- Filed August 14, 1992 and granted August 11, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 14, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 14, 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.