Patent ID: 9038782
Filing Date: 2015-05-26
Classification: B66B,F16G,Y10T

Abstract:
1. A device useful for controlling vibrations of an elevator load bearing member, comprising: a guide associated with a termination, the termination comprising a first spring that tensions the load bearing member; a mass that is moveable along the guide responsive to vibration of the load bearing member to introduce a force to counter the vibration; and a second spring associated with the mass for controlling movement of the mass, the second spring being secured to the mass at one end of the second spring, the second spring operating independent of the first spring, wherein the second spring has a stiffness that cooperates with the mass to cause the introduced force to have a selected phase and a selected frequency, the selected phase being opposite to a phase of the vibration and the selected frequency corresponding to a resonant frequency of the vibration, wherein the guide comprises a sleeve and the mass is received at least partially in the sleeve.