Gearings providing a discontinuous or stepped range of gear ratios

Full Title

Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members (control of change-speed or reversing-gearings conveying rotary motion F16H59/00 - F16H63/00) > with members having orbital motion > Gearings providing a discontinuous or stepped range of gear ratios