The lengths of the links comply with the condition: A͞B=B͞C=C͞D=D͞A=P͞A=C͞Q. Figure ABCD is a rhombus link-age and points P, D and Q lie on a single straight line. Line QF of link 6 should be parallel to line EP. Link 1 turns about fixed axis E and is connected by turning pairs D to links 2 and 3 and by turning pair F to link 6. Link 5 turns about fixed axis P and is connected by turning pairs A and B to links 3 and 4. Link 4 is connected by turning pairs C and Q to links 2 and 6. When link 1 turns about fixed axis E, link 6 has translational motion and all of its points describe circles of radius E͞F.
$728$LW,GI$