The bead is engaged with one of the notches and a concaved area is defined in {TAIL ~ the inner periphery} of {HEAD ~ the ring} so as to receive the two pawls 
The bead is engaged with one of the notches and a concaved area is defined in { TAIL ~ the inner periphery } of { HEAD ~ the ring } so as to receive the two pawls
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH