Motor operator for a stored energy operating mechanism

A mechanism for supplying energy to a circuit breaker of the type including means for storing energy and a transfer shaft for transferring energy to the means for storing energy, the mechanism for supplying energy comprising:

• a support means;
• a first shaft adapted to be coupled to the transfer shaft, wherein the first shaft is rotatably supported by the support means;
• a second shaft rotatably supported by the support means;
• a cam supported by the second shaft;
• a motor for producing rotational motion;
• means for transferring the rotational motion of the motor to the second shaft;
• a member including a slot and a cam follower, wherein the member is slidably supported by the support means such that contact between cam follower and cam is maintainable;
• an arm including an extension slidably engaging the slot, wherein the arm is fixed to the first shaft;
• and
• means for maintaining the cam follower in engagement with the cam;
• the cam including a cam surface having a rise portion followed by a return portion which drops back to the beginning of the rise portion,
• the extension engaging the slot such that:
• the arm rotates the first shaft from a first position to a second position when the cam is rotated and the cam follower is in contact with the rise portion;
• the arm does not rotate the first shaft when the cam is rotated and the cam follower is in contact with the return portion;
• and
• the arm does not rotate the first shaft when the shaft is in the second position.