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SCREW-OPERATED WEDGE-LEVER CLAMPING MECHANISM

Screw 5 advances link 4 which has bevel a-a at its lower end. Link 4 slides along the bevel of link 3, moving it in the horizontal direction. At point A link 3 pushes lever 2, turning it about fixed axis B to clamp workpiece 1.
$2199$WL,GC$