Shaft 6 rotates about fixed axis A, imparting rotation to disk 1 together with rack 2. Rack 2 is connected by rod 3 to link 4 which is mounted on shaft 7 and rotates about fixed axis B. Axes A and B are parallel to each other. When shaft 6 rotates, rack 2 has a supplementary reciprocating motion in the slot of disk 1. As a result, gear 5 and shaft 7 rotate with nonuniform velocities depending upon the relations of the dimensions of the links.
$2460$LrG,ML$