The lengths of the links comply witht the conditions: 0͞D=0͞E=0͞F=0͞C and A͞C=A͞E=B͞F=B͞D. Links 1, 2 and 3 turn about fixed axis 0. Link 5 turns about fixed axis D. Pins A and B slide along slots of links 2 and 3. For an arbitrary position of link 1 with respect to link 4, links 2 and 3 divide the angle between fixed link 4 and link 1 into three equal parts.
$1295$LG,MO$