Abstract: A graphite material device (1), wherein the graphite material device is provided, internally and/or externally, with at least one conductive pattern (2) and/or at least one sensor (2) and wherein the graphite material device is used as any one of a carbon brush, a brake disc, a bushing and a bearing.

Abstract: A brush holder for electrical machines has a clamping piece with a first mounting part and a second clamping part, which when assembled define a clamping hole to be assembled around a spindle; and two brush holder arms pivotally mounted on the first mounting part of said clamping piece, and adapted to receive and retain a brush. The arms have an upper side which is opposite to a lower side facing a slip ring; at least one biasing spring to act upon said brush holder arms in such a way that said brush holder arms move pivotally towards and presses said brushes against the slip ring. A conductive wire connects the brush to the clamping piece. A brush holder arm locking mechanism is adapted to be inserted into a slot in the second clamping part. A brush locking pin retains the brush in said brush holder arm and provided in corresponding bores arranged in the brush holder arm and the brush.

Abstract: A contact brush holder is disclosed. According to an aspect, a brush holder is provided for receiving at least two contact brushes and holding the brushes in contact with a slip ring in an electrical power device. The brush holder comprises a holder body adapted for receiving said brushes. The brushes are arranged on opposite sides of a plane in which a central axis of the brush holder is located and in which an axis of rotation of the electric apparatus is situated. A biasing device is provided for biasing the holder body towards the slip ring, thus biasing the at least two contact brushes towards the slip ring.