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