Elevator diagnostic monitoring apparatus
CA 1306317 C · Owner: Schienda, Gregory A. · Inventors: Schienda, Gregory A.; Mayfield, Mark L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Elevator Diagnostic Monitoring Apparatus Apparatus is connected by way of a serial communication link to at least one computer-based elevator controller in order to monitor the diagnostic output of each connected controller. The diagnostic output of a controller is determined in a manner by which the elevator system is modeled as normally operating sequentially from state to state in a closed loop sequence of linked operating states. Any deviations from this sequence generate diagnostic messages that are communicated from the controller to the monitoring apparatus. Also communicated are the last to occur of a plurality of parameter signal state changes. The monitoring apparatus processes …
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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 August 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 11, 2009.
- 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.