The lengths of the links comply with the conditions: A͞B=C͞B=M͞B=1; M͞D=1.6; E͞A=0.54; F͞D=0.81; C͞E=1.29; C͞F=1.92; β=80°; E͞F=2.57; Point M of connecting rod 2 in four-bar linkage EABC describes symmetrical connecting-rod curve a-a which is self-intersecting at point C. Link 3 is connected by turning pair M to connecting rod 2 and by turning pair D to link 4 which oscillates about fixed axis F. For the specified dimensions one revolution of crank 1 corresponds to two complete oscillations of link 4 (one slow and one fast).
$602$LW,6L$