Crank 1, rotating about fixed axis A, has pin a sliding in slot b of link 6. Pin d of link 6 slides in slot e of slotted link 5 which is rigidly secured to worm wheel segment 4. At the end of link 6 are two lugs f which slide along the axis of link 2. Link 2 turns about fixed axis B. When crank 1 rotates, link 2 oscillates. The angle of oscillation of link 2 can be adjusted by turning worm 3 with the handwheel . This turns worm wheel segment 4, changing the position of slotted link 5. Adjustment can be made in operation.
$1037$LG,ML$