Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1979-12-03
1982-04-06
Truhe, J. V.
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
043231420
ABSTRACT:
An elevator control system employs a microprocessor-based group controller which communicates with the cars of the elevator system to determine the condition of the cars, and responds to hall calls registered at a plurality of landings in the building serviced by the cars under control of the group controller, on a cyclic basis which recurs several times per second, to assign every unanswered hall call to a car deemed best suited for response to that call, in each cycle, based upon the information provided by the car to the group controller within that cycle of operation. In any cycle in which a call is assigned to a car other than a car to which the call had previously been assigned, the assignment of the call to the previous car is nullified. At the end of each cycle, any car which indicates that its committable position coincides with the floor of a hall call which has been assigned to it will receive a stop command. In the assignment of calls to cars, preference is given to any car which previously had a call, although the preference is relative and not absolute. Exemplary elevator apparatus, signal processing apparatus, and logic flow diagrams are disclosed to illustrate the specific manner of assigning calls to cars on a continuously updated basis, and to illustrate the environment in which the invention may be practiced.
REFERENCES:
patent: 3851733 (1974-12-01), Sackin et al.
patent: 4046228 (1977-09-01), Powell
Duncanson Jr. W. E.
Otis Elevator Company
Truhe J. V.
Williams M. P.
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