Strap clamp 2 has slot e which slides along upper part b of bolt 5, slot f for rapid withdrawal and pad d for clamping the workpiece. Cam 1 turns about fixed axis A and is rigidly attached to handle 7 and to lug c. The working surface of cam 1 slides along flat lower face a of clamp 2. To clamp workpiece 3, clamp 2 is pushed forward and lever 7 is turned counterclockwise. To release the workpiece, handle 7 is turned clockwise. Lug c engages slot f of clamp 2 and withdraws the clamp to the right. Spring 4 holds clamp up against the head of bolt 5 so that it clears workpiece 3 when undamped. The height of clamp 2 can be adjusted by bolt 5 which is then locked in the required position by nut 6.
$3225$CmL,GC$