Link 1 rotates about fixed axis A. Slider 3 moves in straight guiding slot b-b of link 2 which reciprocates in fixed guides c-c. Slot a-a slides along axle A. The displacement of link 2 is equal to s₂=A͞Bcos(α), where A͞B is the length of crank 1 and α is the angle made by A͞B with axis x-x
$934$LG,4L$