Crank 1 rotates about fixed axis A and is connected by turning pair B to slider 8 which moves along slot a of link 2. Link 2 slides in fixed guide p and has gear rack b meshing with gear segment c of link 4 which turns about fixed axis D. Link 4 is connected by turning pair E to slider 3 which moves along slot f of link 5. Link 5 slides in fixed guide q and is connected by turning pair F to pawl 6 which engages ratchet-tooth rack 7 sliding along fixed guide r. When crank 1 rotates about axis A, slotted link 2 with rack b reciprocates, link 4 oscillates, slotted link 5 reciprocates and pawl 6 moves rack 7 intermittently to the right.
$1820$LR,ML$