Link 1, turning about fixed axis B, has adjustable pin a which slides in guide p of cross-shaped link 3. Link 2, rotating about fixed axis A, has adjustable pin d which slides in guide q of link 3. When link 1 is turned, cross-shaped link 3 slides along pins a and d. This turns shaft A through a certain angle. Thus, when link 1 oscillates about vertical axis B, link 2 oscillates about horizontal axis A. The angle of oscillation of link 2 can be varied by adjusting pins a and d along the slots in links 1 and 2.
$983$LG,4L$