Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1975-12-30
1977-08-23
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
040434290
ABSTRACT:
An elevator car group control system for controlling a plurality of elevator cars arranged for parallel operation for serving a plurality of service floor landings of a building, comprising means for selecting suitable ones of the cars for serving hall calls, and means for forecasting the length of time required for each of the selected cars to arrive at each of the allotted hall call originating floors and displaying the forecast waiting time on display means disposed at the landing of each of the floors. In the invention, the serving car selecting means comprises means for detecting for each car the number of floors subject to change in forecast waiting time displayed at each of the already allotted floors when a new hall is originated from one of the floors, and means for preferentially selecting the car detected to provide a smaller number of floors subject to such change than the others. That is, in response to the origination of a new hall call, the number of floors subject to change in already displayed forecast waiting time due to the allotment of the new hall call is detected for each of the cars, and the car providing a smaller number of floors subject to such change than the others is preferentially selected to respond to the new hall call.
REFERENCES:
patent: 3443668 (1969-05-01), Hall et al.
patent: 3450231 (1969-06-01), Kuzara
patent: 3511342 (1970-05-01), Hall et al.
patent: 3739880 (1973-06-01), Robaszkiewicz
patent: 3851733 (1974-12-01), Sackin et al.
Hirasawa Kotaro
Iwasaka Tatsuo
Kaneko Takashi
Kuzunuki Soshiro
Duncanson Jr. W. E.
Hitachi , Ltd.
Schaefer Robert K.
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