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, B66B 1308
Patent
active
043423787
ABSTRACT:
An elevator system includes a microprocessor-based cab controller mounted directly on an elevator car, which controls the operation of the elevator door. Elevator door motion is commanded in response to the difference in actual door velocity from a desired, dictated door velocity in accordance with desired rates of acceleration and deceleration, and desired maximum velocity, acceleration and deceleration, the point at which deceleration is to begin, and a velocity at which decleration is to decrease. The disclosed invention provides a bench velocity, a final, slow velocity, by controlling the velocity at which deceleration is to decrease, so that the acceleration vs time of the profile exceeds the deceleration vs time of the profile by an amount resulting in the desired, final bench velocity. An exemplary elevator system, an exemplary microprocessor-based controller, and logic flowcharts for an overall door control program, illustrative of an environment of the invention, as well as details of the invention, are disclosed herein.
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
Duncanson Jr. W. E.
Otis Elevator Company
Truhe J. V.
Williams M. P.
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