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