Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1979-12-27
1982-08-03
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
318561, 318617, B66B 1308
Patent
active
043423795
ABSTRACT:
An elevator system has a microprocessor-based cab controller mounted directly on the elevator car, the elevator door mechanism is connected to a transducer which provides signals as a function of the position of the door mechanism, and the cab controller controls the door motion in a closed loop manner by providing door command signals to the elevator door mechanism in dependence upon the deviation of the present door velocity from a current value of a dictated velocity in accordance with a desired door traverse velocity profile which includes desired increasing and decreasing rates of acceleration and deceleration, and desired maximum velocity, acceleration and deceleration. The disclosure includes a typical elevator system, an exemplary cab controller, and an exemplary door control program flowchart as an environment for the present invention, in addition to details concerning the invention.
REFERENCES:
patent: 3376486 (1968-04-01), Caputo
patent: 3627080 (1971-12-01), Yuminaka et al.
patent: 3673482 (1972-06-01), Davey
patent: 3729668 (1973-04-01), Brette
Games John E.
Hmelovsky Michael W.
Duncanson Jr. W. E.
Otis Elevator Company
Truhe J. V.
Williams M. P.
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