Cams 2 and 2' turn about fixed axes A and A'. Levers (shaped clamps) 3 and 3' turn about fixed axes B and B'. Clamping bolts 4 and 4' turn about axes A and A' and pass freely through holes a and a' in levers 3 and 3'. When nuts 5 and 5' are tightened on bolts 4 and 4', levers 3 and 3' bear against cams 2 and 2' which clamp workpiece 1.
$1706$LC,GC$