When the oscillating member pivots in one direction, it engages the ends of the sprag levers to turn the intermediate member When the oscillating member moves in the other direction, {HEAD ~ the clutch teeth} simply ratchet over {TAIL ~ the ends} of the sprag levers 
simply ratchet over
When the oscillating member pivots in one direction , it engages the ends of the sprag levers to turn the intermediate member When the oscillating member moves in the other direction , { HEAD ~ the clutch teeth } simply ratchet over { TAIL ~ the ends } of the sprag levers
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH