Patent ID: 8476993
Filing Date: 2013-07-02
Classification: H01H

Abstract:
1. A motor operator, for an electrical power switch, comprising: a motor having a motor shaft; an output member attachable to a switch operating mechanism; an electromechanical drive assembly coupled between the motor shaft and the output member, the electromechanical drive assembly including a first drive element continuously mechanically linked to, and subject to movement with, the motor shaft and a second drive element continuously mechanically linked with the output member; the first drive element having affixed thereto an electromechanical transducer including a movable part upon energization of the transducer, the movable part arranged on the first drive element to temporarily mechanically engage the second drive element, with transfer of motor force to the output member sufficient for the operation of the electrical power switch, during operation of the motor; the first and second drive elements and their temporary engagement of the movable part with the second drive element also being arranged to disengage from each other following motor operation and de-energization of the electromechanical transducer and retraction of the movable part from engagement with the second drive element to effect positive disengagement of the first and second drive elements; an operating member continuously mechanically linked with the output member, the operating member being arranged to receive manual force from a source independent of the motor to drive the output member without requiring movement of the motor shaft or the first drive element.