Input: pink crank rotating continuously.
Output: yellow ratchet wheel rotating interruptedly.
Coulisse mechanism (pink crank, blue slider and green slotted rocker) makes the green rocker oscillate.
Violet crank has a pin for orange pawl. Pink spring creates some breaking force for the violet crank.
Two cyan pins on the green rocker contact the pawl.
The mechanism is quiet because when the rocker goes back, the pawl does not contact the wheel.