Link 1 is connected by screw pair A to lever (sliding clamp) 2. Tip b of the screw enters a spotted seat in the base. Clamp 2 has slot a by means of which it slides along fixed pin d. Workpiece 3 is clamped by lever 2 when link 1 is turned in the direction of the arrow (screwed in).
$188$SL,GC$