Patent ID: 8282398

Claim:
A method to transfer electrical energy via rolling elements of one or more rolling-element bearings of an x-y table of a camera, comprising the following steps: (1) providing a camera comprising a x-y table having a fixed part and a movable part, a number of linear motors to position the movable part of the x-y table, and one or more rolling-element bearings to guide the movable part of the x-y table, wherein a number of rolling elements are made of electrically conductive material; (2) deploying electrical conductor tracks as required on the fixed and on the movable part of the x-y table; (3) connecting the electrical conductor tracks with electrically conducting grooves of the one or more rolling-element bearings on the fixed part and on the movable part of the x-y table; and (4) connecting the electrical conductor tracks on the movable part of the x-y table with one or more electrical devices as desired.