The lengths of the links comply with the conditions: A͞C=C͞B=C͞P, P͞D=Q͞D and E͞P=E͞A. Link 1 has the form of a bent lever and turns about fixed axis A. Arm Ba of link 1 moves in slider 2. Link 3 is connected by turning pairs C and P to links 1 and 7. Link 7 turns about fixed axis E. Link 4 is connected by turning pairs P and D to links 7 and 6. Link 6 is connected by turning pair Q to slider 2 and by turning pair D to link 5 which turns about axis A. The mechanism complies with the inversion condition A͞PxQ͞A=A͞B²=A͞D²-P͞D². Point P describes a circle passing through point A of inversion. Point Q describes straight line q-q which is perpendicular to the line of centres AE.
$1361$LG,GI$