Torque is transmitted from shaft 6 to housing 7 by cam 1 which is keyed to shaft 6 and engages pawl 2. When the speed of the clutch exceeds the preset value, the centrifugal force raises lever 4, compressing spring 3, and pawl 2, compressing spring 5, thereby disengaging the clutch. At this, the speed of housing 7 drops and springs 5 and 4 reengage the clutch again.
$3122$SmC,C$