The lengths of the links comply with the conditions: A͞D=B͞C, D͞F=C͞E and A͞B=D͞C=F͞E. Links 5 and 6 are connected by turning pairs F to slider 8 which moves along straight guides a. The mechanism has two degrees of freedom. For any fixed position of link 4, link 6 can only be moved so that it remains parallel to link 4.
$1530$SC,ML$