The lengths of the links comply with the conditions: C͞B=2A͞C, C͞D=2.4A͞C, B͞D=0.9A͞C, B͞E=2A͞C, F͞D=3A͞C and A͞E =1.6A͞C. Sliding member 7 is reciprocated along guide c-c by link 4 which is connected by turning pair D to connecting rod 2. Sliding member 7 has two dwells when point D is on portions x-x and y-y of its path, since these portions approximate circular arcs described from the corresponding positions of point E. Link 5 actuates link 6 for periodically clamping and unclamping the workpiece (or stock) between jaws a and b.
$806$LW,SF$