The lengths of the links comply with the condition: A͞B=B͞C. Link 1 rotates about fixed axis x-x and is connected by screw pairs to links 3 and 4 which, in turn, are connected by turning pairs A and C to links 5 and 6. Slide 2 moves along fixed guides p-p and is connected by turning pair B to links 5 and 6. Screw 1 has right- and left-hand threads, a and b, of equal pitch. When link 1 is rotated, link 2 slides along guides p-p.
$2244$LS,HP$