Abstract: A collector ring for transferring electrical current between a non-rotatable member and a rotatable member. The collector ring comprises a first support which is fixed to the non-rotatable member and which has at least one conductive metal ring member mounted thereon which is electrically insulated from the non-rotatable member. An input terminal is electrically connected to each of the ring members for connection to a source of electrical energy. A second support is rotatably mounted on the first support with the second support being adapted to operatively mechanically connected to the rotatable member whereby rotation of the rotatable member with respect to the non-rotatable member will cause the second support to rotate with respect to the first support.