Patent ID: 8734164

Claim:
A system comprising: a current control brush assembly, comprising: an axial button comprising a first electrically conductive housing retaining a first plurality of electrically conductive filaments, wherein the first plurality of electrically conductive filaments extends generally inward along an axial direction; and a radial shaft grounding ring (SGR) coupled to the axial button, wherein the radial SGR comprises a second electrically conductive housing retaining a second plurality of electrically conductive filaments, wherein the second plurality of electrically conductive filaments is arranged circumferentially around the second electrically conductive housing, and the second plurality of electrically conductive filaments extends generally inward along a radial direction; wherein the first and second electrically conductive housings directly contact one another to form a unitary assembly, the second electrically conductive housing is configured to mount to a surface of an electrically conductive faceplate, and at least a portion of the first and second pluralities of electrically conductive filaments is configured to contact an axial protrusion of a shaft extending through the electrically conductive faceplate into an interior of the unitary assembly.