When piston 1 is moved forward by the action of fluid delivered to the other end of the cylinder, its rod 2, with spherical member 3, pushes wedge member 4 which spreads two plungers 5 . Plungers 5 turn levers 6 about fixed axes A, clamping workpiece 7 which is located by two pins a. In the return stroke of piston 1, levers 6 are returned to their initial position by springs 8 and release workpiece 7. Adjusting screws 9 are provided to compensate for large variations in thickness of the workpiece.
$3871$LHP,GC$