Ratchet one way overrunning clutch04:33

Grey pulley, grey hollow step shaft, grey tooth ring and glass cover are fixed together.
The rotary transmission from the pulley to the blue shaft is possible only in counterclockwise direction.
The rotary transmission from the blue shaft to the pulley is possible only in clockwise direction.
When both the pulley and the blue shaft rotate at the same time in counterclockwise direction, the clutch can work only in case the blue shaft rotates faster than the pulley.
When both the pulley and the blue shaft rotate at the same time in clockwise direction, the clutch can work only in case the pulley rotates faster than the blue shaft.
When both the pulley and the blue shaft rotate at the same time in opposite directions the clutch can’t work only in case the pulley rotates clockwise.