Link 1 slides in fixed guides p-p and has slot a whose position can be varied by means of screw d and nut c which is designed as a slider moving in guides e of link 1. Link 2 slides in fixed guides q-q and has pin b sliding along slot a. When link 1 moves vertically, link 2 is moved horizontally (i.e. in the perpendicular direction). The displacement of link 2, to a given displacement of link 1, can be varied by changing the angle of inclination of slot a, using screw d and nut c for this purpose.
$2174$WL,3L$