Noncircular gear 5 and circular gear 6 are keyed to shaft B. Gear 5 meshes with noncircular gear 4 which is keyed to shaft C. Gear 6 meshes with gear 7 which rotates freely about shaft C. Gear 7 is rigidly attached to internal gear 8. Carrier 3 is keyed to shaft C and is connected by turning pairs D to planet gears 1 and 2. Gears 1 and 2 mesh with internal gear 8 and with sun gear 9 which is keyed to shaft A. When shaft B or C rotates with uniform velocity, shaft A rotates with nonuniform velocity.
$2892$CxG,PR$