Lug B of C-clamp 1 bears against upper pad 4 . Screw 3 is connected by a screw pair to member 7 which turns freely about pin A in C-clamp 1. The tip of screw 3 bears against lower pad 4. Pads 4 clamp plate 6 when link 2 is pulled in the direction of the arrow. The position of screw 3 is adjusted in member 7 and then locked by nut 5.
$223$SL,GC$