Upon rotation of driving crank 1, driven link 2 oscillates. The angle of oscillation of link 2 can be varied by changing the position of hinge A, with respect to the base, by means of screw device 3 which sets link 4 in various fixed positions. Link 4 is adjusted by moving slide block 5 along stationary guides a-a. At this pin b of slide block 5 slides in slotted lever c which is secured rigidly to link 4.
$599$LW,6L$