Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1990-05-25
1992-02-04
Pellinen, A. D.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
187109, 187105, B66B 302
Patent
active
050852949
ABSTRACT:
An elevator control apparatus comprises drive device for driving an elevator car and a pulse generator, which is connected to the drive device and which generates pulses, the number of which are proportional to the travel distance of the car. The apparatus also comprises computing device for present car position for computing the present position of the car by counting the number of pulses from the pulse generator, computing device for predicted stop position for computing a predicted stop position of the car in case of a power failure during the travel of the car, first memory for storing data of the predicted stop position of the car and for maintaining that data, and second memory for previously storing position data of each floor in relation to an elevator. The elevator control apparatus further includes control device for controlling the drive device based on the present position of the car and the data stored in the second memory, and computing device for correcting car position at power failure for correcting, upon recovery from the power failure, based on the data stored in the first memory and the second memory, the present position of the car, which is computed by the computing device for present car position before the power failure occurs.
REFERENCES:
patent: 4096925 (1978-06-01), Koob et al.
patent: 4671391 (1987-06-01), Sasao
patent: 4716517 (1987-12-01), Iwata
patent: 4742894 (1988-05-01), Ujihara
Colbert Lawrence
Mitsubishi Denki & Kabushiki Kaisha
Pellinen A. D.
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