It focuses on the role of safety gear of elevator, intro-duces safety gear types and working principle of safety gear, as well as the general test methods, common safety gear failure, treatment.

Based on the model of multi-span slender rod, the moment equations and deflection equations of elevator rail with duplex safety gear were established and resolved in a complex state of stress.

The elevator control gear comprises: an incoming panel which obtains the electricity needed by the running of the elevator exteriorly;