When fluid is delivered into the left end of cylinder 1, it moves to the left and piston 3 moves to the right. Cylinder 1 is connected by turning pair A to rocker arm 2 which turns about fixed axis C and, by means of crosspiece 5 and swivelling clamps 5', clamps four workpieces 4 in the vertical direction. At the same time, piston 3, whose rod a is connected by turning pair D to pivote clamp 6, turns the clamp about fixed axis B, clamping workpieces 4 in the horizontal direction. The cylinder, piston, rocker arm and clamps are returned by spring 7 to their initial positions, releasing workpieces 4.
$3855$LHP,GC$