Nut 1 is connected by a screw pair to stud b which is screwed tightly into the fixed link (base). Lever (clamp) 2 is mounted freely on stud b and has slot d that slides along screw support c which is screwed tightly into the base. Workpiece 3 is clamped through pin a by lever 2 when nut 1 is tightened. Spring 4 raises lever 2 to its initial position when nut 1 is released. The device is adjusted by screw support c and locknut e.
$198$SL,GC$