×

Method for reducing rope sway in elevators

  • US 5,509,503 A
  • Filed: 05/26/1994
  • Issued: 04/23/1996
  • Est. Priority Date: 05/26/1994
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method for controlling rope sway in an elevator, comprising the steps of:

  • providing a car for travel in a hoistway, said hoistway having a pair of opposed vertically extending walls, between which said car travels,wherein said car includes a bottom extending between said wails, anda center of gravity having an x and a y coordinate;

    providing a counterweight for traveling between said hoistway walls, wherein said car and said counterweight are connected to one another by a plurality of ropes, extending therebetween;

    attaching a first number of said ropes to said car a distance away from said x coordinate;

    attaching a second number of said ropes to said car a distance away from said x coordinate, equal to said distance said first number of ropes are away from said x coordinate, on the opposite side of said x coordinate as said first number of ropes;

    wherein said distance said ropes are attached away from said x coordinate is great enough such that oscillation of said ropes will cause said ropes to contact said wall adjacent to said ropes and thereby limit the motion of said oscillation.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×