The lengths of the links comply with the conditions: A͞B=D͞C=A͞E=D͞F=A͞G=D͞H and B͞C=E͞F=G͞H=A͞D. Link 3 has three lugs a and encircles fixed circular eccentric 5 which is secured rigidly to frame 6. Rigidly secured to links 2, 7 and 8 are pins 4 which have a circular translational motion.
$908$LW,FD$