Link 1 is connected by turning pair A to the fixed link and by sliding pair B to link 2 which, in turn, is connected by screw pair C to the fixed link. Link 2, designed as a ring, has a prismatic hole by means of which it slides along prismatic shank a of link 1. On the outside, the ring has external thread. Rotation of link 1 is converted into screw motion of link 2. When link 1 is turned through the angle ϕ₁, the displacement of link 2 along axis x-x is s₂=h_C(ϕ₁/(2π)) where h_C is the pitch of the thread in screw pair C. It is taken with a plus sign for right-hand thread and with a minus sign for left-hand thread.
$2208$LS,3L$