Trolley brush

Abstract

A trolley brush for sliding electrical connection with a live rail, which is of simple construction and maintains precise alignment of the sliding contact with the live rail with relative change of position between the live rail and the base of the trolley brush. The trolley brush is comprised of a base, an arm attached thereto which can be turned about a first axis which is almost at right angles to the longitudinal axis of the arm and a sliding contact support attached to the arm which can be turned about a second axis which is almost perpendicular to the first axis and to the longitudinal axis. The base has a slot-like recess whose plane extends in the plane formed by the first axis and the longitudinal axis, the recess having a limiting first wall. A calotte is located on the inside of the first wall, a cambered projection being provided on the arm, engaging in the calotte, whereby the projection pivots the arm in the plane of the recess and about the first axis, a spring being provided between the base and arm, the spring acting upon the arm at a distance from the projection, holding the projection and the calotte engaged and turning the arm in the direction of the sliding contact line.

Dependencies are inferred from the claim text.