B - Operations – Transporting – 66 – B
Patent
B - Operations, Transporting
66
B
364/3
B66B 3/00 (2006.01) B66B 1/18 (2006.01) B66B 1/28 (2006.01)
Patent
CA 1185714
ABSTRACT OF THE DISCLOSURE An elevator system having a plurality of elevator cars and supervisory control for directing their movement in a building to efficiently serve the floors therein. The supervisory control divides the work load uniformly among the elevator cars by periodically assigning, clearing and reassigning service directions from the floors to the cars according to a predetermined strategy. The predetermined strategy accords special treatment for assigning the service directions from floors at which each oar will stop and depart in a predetermined direction due to register car calls. The strategy includes special limitations on such car call related assignments to improve elevator service, with one embodiment limiting such car call related assignments to a predetermined number N, which are the N closest car calls ahead of the car. Another embodiment provides a dynamic limitation on car call related assignments by count- ing the stops due to car calls and previously committed hall calls ahead of each car, and making a car call related assignment only when it is within a predetermined number of stops ahead of the car. BACKGROUND OF THE INVENTION U.S. Patent 4,046,227 issued September 6, 1977 to A. F. Kirsch et al; U.S. Patent 4,037,688 issued July 26, 1977 to C. L. Winkler and Canadian Patent 1,054,735 issued May 15, 1979 to C. L. Winkler et al, which are all assigned to the same assignee as the present appli- cation, disclose a new and improved elevator system in which the strategy utilized by the supervisory control is suitable -1-
281570
Eichler Kenneth M.
Kirsch Andrew F.
Mandel Alan F.
Oldham And Company
Westinghouse Electric Corporation
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