Crank 1 rotates about fixed axis A and is connected by turning pair B to slider 4 which moves along slot a of link 2. Slotted link 2 rotates about fixed axis D. Pin b of slotted link 2 is connected by a turning pair to slider 5 which moves along slot d of slotted link 3. Slotted link 3 turns about fixed axis E and is connected by turning pair F to connecting rod 7 which, in turn, is connected by turning pair G to slider 6. Slider 6 reciprocates along fixed guide f. When crank 1 rotates at uniform velocity about axis A, slotted link 2 rotates at nonuniform velocity, slotted link 3 oscillates and slider 6 travels with approximately uniform velocity over a part of its reciprocating motion.
$1457$LG,FD$