Slide 6 reciprocates in fixed guide b. Flexible link 1 has its ends attached at points B and C to slide 6, and runs 360° around pulley 4 which rotates about fixed axis A. Rigidly attached to pulley 4 is lever a which is connected by turning pair E to pawl 3. Pawl 3 engages the teeth of ratchet wheel 2 which rotates freely about axis A. When slide 6 reciprocates, ratchet wheel 2 is rotated intermittently counterclockwise by pawl 3. The bracket holding the axle at axis A can be adjusted vertically and clamped in the required position by nut 5.
$3538$CFL,ML$