Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1980-04-14
1982-07-27
Rubinson, Gene Z.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
340 21, 318463, B66B 302
Patent
active
043412874
ABSTRACT:
An elevator control apparatus in which a three-phase AC output from a three-phase AC generator rotating with running movement of an elevator car is converted into a train of pulses, and the number of such pulses is counted by a counter which provides a count indicative of the position of the elevator car. When the elevator car is actuated to start from its standstill condition, the running direction of the elevator car is detected on the basis of the direction of phase rotation of the three-phase AC output from the generator, and a predetermined correction data is added to or subtracted from the count depending on the detected running direction of the elevator car so as to correct the count error appearing in the starting stage of the elevator car.
REFERENCES:
patent: 3728565 (1973-04-01), O'Callaghan
patent: 4134476 (1979-01-01), Zolnerovich, Jr. et al.
patent: 4141435 (1979-02-01), Satoh
patent: 4150734 (1979-04-01), Ohira et al.
patent: 4228396 (1980-10-01), Palombo et al.
Hirasawa Kotaro
Imai Masumi
Kuzunuki Soshiro
Sakata Kazuhiro
Yoneda Kanji
Duncanson Jr. W. E.
Hitachi , Ltd.
Rubinson Gene Z.
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