HIGH CURRENT HARP FOR AN ELECTRIC TROLLEY BUS

A harp for an electric trolley bus having a channeled shoe member for sliding engagement with a conducting wire mounted onto a ball-and-socket swivel joint, and including an improved shunt member for carrying electric current from the swivel joint to a transmission cable provided to deliver electric current into the trolley bus, wherein the shunt comprises a flexible length of conductive cable, with a graphite contact secured at a first end, and a copper contact secured at a second end, and including a coil spring to maintain the two contacts biased against their respective adjacent conducting elements, and said graphite contact is adapted to be worn by the swiveling action of the swivel joint to mate with the micro-spherical topography of the adjacent contacting portion of the ball-and-socket swivel joint.