Patent ID: 9676592
Date: 2017-06-13
CPC Classifications: B66B

Claim:
1. An elevator system comprising: an elevator car; a counterweight; a sheave assembly having a suspension sheave portion and a compensation sheave portion; a suspension rope passing over and guided by the suspension sheave portion, the suspension rope having a first suspension end coupled to the elevator car on a car side of the elevator system and a second suspension end coupled to the counterweight on a counterweight side of the elevator system; a first and a second compensation rope passing around and guided by the compensation sheave portion, the first and second compensation ropes both having a respective first compensation end coupled to the elevator car on the car side and a second compensation end coupled to the counterweight on the counterweight side; a first optical sensor assembly positioned on the counterweight side of the elevator system and having; a controller that controls movement of the elevator car based on the detected interruption.