Gear 1 rotates about fixed axis A and meshes with gear 2 which rotates about fixed axis B. Gear 2 meshes with gear 3 which rotates about fixed axis C. Crank 6 is rigidly attached to gear 3 and is connected by turning pair D to connecting rod 8 which, in turn, is connected by turning pair E to Y-shaped rocker arm 7. Rocker arm 7 turns about axis A. The large roll gear is rigidly attached to gear 1 and has the same pitch diameter. Two small rolls rotate about axes F and K at the ends of members b and a of link 7. They are rigidly attached to roll gears 5 and 4 which mesh with gear 1. When driving gear 1 rotates, rocker arm 7 makes one full oscillation to each revolution of gear 3.
$2561$LrG,FD$