Input: green crank oscillating.
Output: ratchet wheel of tooth number Z rotating interruptedly.
The gravity maintains contact between 2 coaxial pawls and ratchet wheel.
The ratchet wheel thickness must be twice the pawl ones.
Speciality: the mechanism acts as in case where there is one pawl and ratchet wheel tooth number is 2Z. It helps increase tooth strength.
The pawls one by one push the wheel.