Carbon fibre fringe brush

The fringe brush is now being manufactured commercially primarily for use on those undirectional machines which even with the best grade of conventional brush have considerable commutation difficulties at the leaving edge. The work carried out by Morganite Electrical Carbon in developing the carbon fibre brush from the original all-fibre design to the present-day fringe brush is described in this paper. The latter combines in one brush the characteristics of conventional brush materials with the additional commutating advantages provided by having carbon fibres at the leaving edge of the brush. Brief details are given of the early laboratory experiments and the expansion of this work onto constructor test bed and field trials over a wide range of machines and applications.