B - Operations – Transporting – 66 – B
Patent
B - Operations, Transporting
66
B
364/11
B66B 1/20 (2006.01)
Patent
CA 1216683
Variable Elevator Up Peak Dispatching Interval Abstract A plural elevator system having a group controller for controlling the joint response of a plurality of elevator cars to the needs of a building, employs a microprocessor-based group controller for providing up peak, down peak and other zone-controlled elevator functions. The group controller provides a variable interval between dispatching of elevator cars from the lobby during up peak, the dispatching interval being controlled by the approximate round trip time of an elevator being dispatched from the lobby in serving the car calls registered within it and re- turning to the lobby, or the average of the approxi- mate round trip time for two or three most recently dispatched elevator cars. The dispatching interval is determined by the approximate round trip time divided by the number of elevator cars serving the up peak traffic. In addition, the dispatching interval can be further reduced in dependence upon the number of cars standing at the lobby, the re- duction being greater in case the last car leaving the lobby is not more than half full than in the case when the last car leaving the lobby is more than half full. Exemplary elevator and microprocessor structure, an overall group controller microprocessor program logic flowchart, illustrative of the environment of the invention, and detailed logic flowcharts illus- trative of an embodiment of the invention are disclosed.
364880
Bittar Joseph
Mendelsohn Arnold
Gowling Lafleur Henderson Llp
Otis Elevator Company
LandOfFree
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