A contact assembly for making electrical connection between coaxial members generally includes a rotor having a plurality of spaced apart circumferential electrically conductive rings, and a stator surrounding a :rotor with a plurality of spaced apart grooves aligned with t:he plurality of rings at a variable distance therefrom. A plurality of circular canted-coil springs is provided with each spring being disposed and a corresponding groove providing constant force against a corresponding ring indepencíent of the variable distance between the compression ring and the groove. A plurality of electrical leads is provided with each lead being electrically connected to a corresponding ring.