A spring ring circuit assembly for transmitting electricity between a non-rotating structure and a rotating structure comprising: a first structure, said first structure having a spindle; a second structure rotatable relative to said first structure; a spring ring non-rotatably affixed to and positioned around said spindle, said spring ring being substantially circular to form a circular structure but including an opening in said spring ring's circular structure to allow said spring ring to contract inward and expand outward; a first electrical contact electrically connected to said spring ring; a circular band affixed to said second structure and concentrically positioned around said spring ring; a second electrical contact electrically connected to said circular band; an inner set of rollers positioned around and engaging said spring ring so as to form an annular configuration with adjacent rollers in said inner set of rollers not engaging one another; an outer set of rollers positioned within and engaging said circular band so as to form an annular configuration with adjacent rollers in said outer set of rollers not engaging one another; said circular band rotatable relative to said spring ring and spindle with the rotation of said inner and outer sets of rollers, and wherein said spring ring is in a compressed state so as to force said inner and outer sets of rollers outward until constrained by said circular band; and said spring ring, said rollers, and said circular band being electrically conductive, and said inner and outer rollers electrically connected to allow electricity to transmit between said first electrical contact and said second electrical contact through said spring ring, said inner and outer sets of rollers, and said circular band. a first structure, said first structure having a spindle; a second structure rotatable relative to said first structure; a spring ring non-rotatably affixed to and positioned around said spindle, said spring ring being substantially circular to form a circular structure but including an opening in said spring ring's circular structure to allow said spring ring to contract inward and expand outward; a first electrical contact electrically connected to said spring ring; a circular band affixed to said second structure and concentrically positioned around said spring ring; a second electrical contact electrically connected to said circular band; an inner set of rollers positioned around and engaging said spring ring so as to form an annular configuration with adjacent rollers in said inner set of rollers not engaging one another; an outer set of rollers positioned within and engaging said circular band so as to form an annular configuration with adjacent rollers in said outer set of rollers not engaging one another; said circular band rotatable relative to said spring ring and spindle with the rotation of said inner and outer sets of rollers, and wherein said spring ring is in a compressed state so as to force said inner and outer sets of rollers outward until constrained by said circular band; and said spring ring, said rollers, and said circular band being electrically conductive, and said inner and outer rollers electrically connected to allow electricity to transmit between said first electrical contact and said second electrical contact through said spring ring, said inner and outer sets of rollers, and said circular band.