The lengths of the links comply with the condition: A͞E=E͞B=D͞E=E͞C. Link 1 (vise screw) rotates about fixed axis x-x and is connected by turning pair F to link 2 (movable jaw) and by screw pair G to the fixed link (fixed jaw). Link 3 turns about fixed axis A and has pin B sliding along slot b of link 2. Link 4 is connected by turning pair C to link 2 and has pin D sliding along fixed slot d. Links 3 and 4 are connected together by turning pair E. When screw 1 is rotated, movable jaw 2 advances with translational motion to clamp the workpiece.
$2286$LS,FD$