The elevator overspeed governor is of the centrifugal type and is able to work either upwards or downwards. As one of important elevator safety components, the elevator overspeed governor is fixed directly to the floor in the machine room or in the upper part of the hoistway, joined by the rope to its tension device located in the pit. This tension device is attached to the guide pulley by flanges.
The rope passes through the groove of the governor and the tensing pulley. The ends of the rope are attached to the elevator safety gear. Thus, when the car reaches its tripping speed, the safety gear will interact with over speed governor in lift and stop elevator car.
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