Link 1 turns about fixed axis A and is connected by turning pair B to pulley 6. Flexible link 5 runs over pulleys 6 and 2, of equal diameter, the latter being rigidly attached to the base. Link 3 is connected by turning pairs C and D to flexible link 5 and to link 4 which turns about axis A. When link 1 turns about axis A, link 3 has a complex motion and link 4 oscillates about axis A.
$1882$FL,6L$