Patent ID: 8992385
Filing Date: 2015-03-31
Classification: A63B

Abstract:
1. A cable tension system comprising: a) a pivotally mounted lever mechanism; b) a weight movably engaged with said lever mechanism; c) a motion imparting mechanism for moving said weight with respect to said lever mechanism; d) a first cable having a first end in communication with said lever mechanism at an attachment point, and an opposite end in communication with a rotatable disc attached to a rotatable axial rod; e) a rotatable cam fixedly engaged with said rotatable disc, said cam including a plurality of openings therein; f) a second cable having a first end in communication with said cam, and an opposite end in communication with a lifting bar; and g) a safety latch attached to an electromechanical mechanism for automatically inserting said safety latch into one of said openings in said cam in an emergency situation; wherein tension on said first and second cables between said lever mechanism and said lifting bar corresponds to the position of said weight with respect to said lever mechanism; wherein said cam has a shape that provides substantially even tension to said second cable as said cam rotates to compensate for movement of the lifting bar and arcuate movement of the lever mechanism; and wherein insertion of said safety latch into one of said cam openings prevents tension from being transmitted through said second cable.