Link 4 whose axis is a circular arc slides in circular guide b of link 2 . When driving crank 1 rotates about fixed axis A, link 2 reciprocates in fixed guides a-a. The stroke of slider 2 is varied by changing the position of pivot B. This is accomplished by rigidly clamping lever 3 in the required position. The design of the clamp for lever 3 is not shown.
$1525$SC,6L$