Link 1 rotates about fixed axis x-x and is connected by screw pair A to the fixed link. Tip a of link 1 contacts ball 2 which rolls along inclined prismatic guide 3. Link 4 slides in fixed guide p and has slot b sliding along fixed pin d. When adjusting link 1 is turned, ball 2 is displaced along guide 3 which is inclined in two directions. Ball 2 sets driven link 4 in the required position. Spring 5 holds the links of the mechanism in positive contact.
$2254$LS,PS$