A clockwise torque is applied about fixed axis A to ratchet wheel 1 by weight 4. Pawl 3 turns about fixed axis B and engages the teeth of wheel 1. Flat spring 2 encircles the hub of wheel 1 with a friction bearing and its end d passes between pinse of pawl 3. When ratchet wheel 1 is rotated counterclockwise to hoist the load, spring 2 has a tendency to turn with the wheel, and it turns pawl 3 clockwise until its lug reaches pin a, thereby lifting pawl 3 out of contact with wheel 1 and preventing the clicking noise as it slides over the teeth.
$2766$RG,MH$