Four identical pulleys 1, 2, 3 and 4 rotate about fixed axes A, B, C and D. Identical pulleys 6 and 7 rotate about axes F and K of slide 5 which moves in fixed guides E. Endless flexible link 8 runs over all six pulleys. When pulley 1 rotates about axis A, all the other pulleys rotate about their axes, and slide 5 can travel in guides E with any kind of motion.
$3581$CFL,DF$