The lengths of the links comply with the conditions: A͞B=D͞C and B͞C=A͞D. Cranks 1 and 3 rotate in opposite directions with unequal angular velocities. The transmission ratio is i₁₃=D͞E/A͞E.• Point E is the intersection of the axis of connecting rod 2 and line A͞D.
$641$LW,CC$