Link 1 turns about fixed axis x-x and is connected by a screw pair to link 3. Rigidly attached to link 3 is slider d which moves along slot b-b of link 2. Slotted link 2 slides in fixed guides p-p. When link 1 is rotated, slotted link 2 has straight translational motion in guides p-p.
$2177$WL,4L$