Patent ID: 8534444

Claim:
A main drive shaft brake for a passenger conveyor, the brake comprising: a braking element for halting movement of a driving mechanism in the passenger conveyor system; an actuator connected to the braking element for controlling activation of the braking element, the actuator movable between an energized mode, in which power supplied to the actuator keeps the braking element in a ready position, and an un-energized mode, in which a lack of power supplied to the actuator causes the actuator to release the braking element, thereby halting movement of the driving mechanism in the passenger conveyor system; and a counter-actuator connected to the actuator, the counter-actuator movable between an energized mode in which power supplied to the counter-actuator keeps the counter-actuator from interfering with the actuator, and an un-energized mode, in which a lack of power causes the counter-actuator to block the release of the braking element.