Ratchet wheel 1 rotates clockwise about fixed axis A. Pawls 2 and 3 turn about fixed axis B. Pawl 2 is longer than pawl 3 by one half or one and a half pitches ( 1½ as shown) of ratchet wheel 1. The pawls prevent reverse rotation of wheel 1 by more than one half pitch. The provision of two pawls is equivalent to doubling the number of teeth on ratchet wheel 1.
$2708$RG,4L$