When ratchet wheel 1 rotates clockwise about fixed axis A, wheel 2, having tooth a and being rigidly attached to wheel 1, turns 8-tooth gear 3 about fixed axis B. When ratchet wheel 1 rotates eight revolutions, gear 3 makes one revolution, consisting of eight rotation and eight dwell periods. Pawl 4 turns about fixed axis D and prevents rotation of wheel 1 in the reverse direction.
$2742$RG,D$