A second set of {HEAD ~ sprags} on the intermediate member cooperates with clutch teeth on a fixed member to prevent {TAIL ~ retrograde movement} 
A second set of { HEAD ~ sprags } on the intermediate member cooperates with clutch teeth on a fixed member to prevent { TAIL ~ retrograde movement }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL