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