Elevator – industrial lift truck – or stationary lift for vehicle – Having specific load support drive-means or its control – Includes linking support cable in drive-means
Patent
1994-05-26
1996-04-23
Noland, Kenneth
Elevator, industrial lift truck, or stationary lift for vehicle
Having specific load support drive-means or its control
Includes linking support cable in drive-means
187404, B66B 1108
Patent
active
055095038
ABSTRACT:
A method for controlling rope sway in an elevator is provided. In the first step a car is provided for travel in a hoistway, wherein the hoistway includes a pair of opposed vertically extending walls between which the car travels. The car includes a center of gravity having an x coordinate and a y coordinate. In the second step, a counterweight is provided for traveling between the hoistway walls. The car and the counterweight are connected to one another by a plurality of ropes. In the third step, a first number of ropes are attached to the car a distance away from the x coordinate of the car. In the fourth step, a second number of ropes are attached to the car a distance away from the x coordinate, equal to the distance the first number of ropes are away from the x coordinate, on the opposite side of the x coordinate as the first number of ropes. The distance the ropes are attached away from the x coordinate is great enough such that oscillation of the ropes will cause the ropes to contact the wall adjacent to the ropes and thereby limit the magnitude of the oscillation.
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Noland Kenneth
Otis Elevator Company
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