Identical pulleys 1 and 4 rotate about fixed axes A and B. Identical pulleys 2 and 5 rotate about axes D and C of slide 7 which reciprocates in guide a of slide 8. Identical pulleys 3 and 6 rotate about axes E and F of slide 8 which reciprocates along fixed guide b. Endless flexible link 9 runs over all six pulleys. When pulley 1 rotates about axis A, all the other pulleys rotate about their axes and slides 7 and 8 can travel in and along guides a and b with any kind of motion.
$3575$CFL,DF$