Gear rack 1 is moved to the right in guides a-a by spring 5. Rack 1 meshes with gear 2 which it turns clockwise about fixed axis A. Gear 2 is connected by pawl 7 to ratchet wheel 3. Ratchet wheel 3 has pins b that are engaged by lugs d of connecting rod 6 of the linkage BCDE. When lever 4 is oscillated, ratchet •wheel 8 is stopped intermittently when lugs d engage pins b.
$1840$LR,SD$