Patent ID: 8766812

Claim:
A tension sensor system for sensing tension of a cable, comprising: a high-tension arm mounted on a first pivot and biased to rotate the high-tension arm along a first arc in a first direction; a low-tension arm mounted on a first pivot and biased to rotate the low-tension arm along a second arc in a first direction; a first pulley mounted on the high-tension arm and adapted to receive a cable such that tension on the cable exerts a force to rotate the high-tension arm along the first arc in a second direction; a second pulley mounted on the low-tension arm and adapted to receive the cable such that tension on the cable exerts a force to rotate the low-tension arm along the second arc in a second direction; a high-tension sensor configured to output a signal when the high-tension arm rotates to a high-tension position; and a low-tension sensor configured to output a signal when the low-tension arm rotates to a low-tension position.