Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1975-12-12
1978-07-25
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 130
Patent
active
041024362
ABSTRACT:
An elevator system including an elevator car to be stopped at a predetermined stopping point from any initial speed below a predetermined maximum value, at a predetermined uniform rate of deceleration. The uniform rate of deceleration determines the desired speed versus distance-to-go reference pattern, which is initiated at a predetermined fixed distance from the stopping point. If the car speed is at the maximum value, deceleration will be initiated immediately. If the car speed is below the maximum value, the car is allowed to continue at the same speed until the car speed and location of the car relative to the stopping point match a point on the reference pattern. This point is accurately determined via digital feedback and comparison circuits which start the elevator car on the desired deceleration speed pattern with zero error. When the point on the reference pattern is reached, digital control circuitry including an up-down counter provides an error count for an actuator which controls the deceleration of the car to closely follow the reference pattern.
REFERENCES:
patent: 3737751 (1973-06-01), Lima
patent: 3777855 (1973-12-01), Boyldew et al.
patent: 3783974 (1974-01-01), Gilbert et al.
patent: 3893695 (1975-07-01), Rickert
patent: 3917029 (1975-11-01), Maynard
Geyer Manvel A.
Kernick Andress
Ravas Richard J.
Duncanson Jr. W. E.
Lackey D. R.
Schaefer Robert K.
Westinghouse Electric Corp.
LandOfFree
Elevator system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Elevator system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Elevator system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1417085