Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1976-07-09
1977-12-20
Schaefer, Robert K.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
B66B 118
Patent
active
040636208
ABSTRACT:
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 car 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 counting 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.
REFERENCES:
patent: 3443668 (1969-05-01), Hall et al.
patent: 3450231 (1969-06-01), Kuzara
patent: 3511342 (1970-05-01), Hall et al.
patent: 3851733 (1974-12-01), Sackin et al.
patent: 3851734 (1974-12-01), Sackin
Eichler Kenneth M.
Kirsch Andrew F.
Mandel Alan F.
Duncanson Jr. W. E.
Lackey D. R.
Schaefer Robert K.
Westinghouse Electric Corporation
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