Human-powered gyroscope

A human-powered gyroscope comprising,

• a frame for supporting the gyroscope,
• a ring assembly comprising an inner ring, an intermediate ring and an outer ring concentrically disposed with each other, the outer ring being mounted on the frame for rotation relative to the frame about a first axis extending generally diametrically of the outer ring, the intermediate ring being mounted on the outer ring for rotation relative to the outer ring about a second axis extending generally diametrically of the intermediate ring, and the inner ring being mounted on the intermediate ring for rotation relative to the intermediate ring about a third axis of rotation extending generally diametrically of the inner ring, and
• means for supporting a human rider on the ring assembly, the ring assembly being constructed and arranged such that when the rings are generally coplanar and the rider is in an upright position one of said axes of rotation is oriented generally horizontally, and the other axes of rotation are oriented non-horizontally and non-vertically.