Patent ID: 8813602

Claim:
Apparatus for balancing a machine, comprising: a balance ring coupled to the machine, said balance ring having a number of balancing elements, each of said balancing elements being formed with a cavity defining an inner wall connected at opposite ends to spaced side walls, a beam being located in each of said cavities, each of said beams having a first end and a second end, said first end of each of said beams being connected to one of said side walls; a number of actuators mounted to said balance ring, each of said actuators being coupled to one of said balancing elements; an electrical energy generating device coupled to said actuators; a light source spaced from said electrical energy generating device across an air gap, said light source being positioned to direct radiant energy onto said electrical energy generating device; each of said actuators being effective to move a respective balancing element to a selected radial location relative to the machine powered by electrical energy from said electrical energy generating device.