{HEAD ~ A toothed arch block} is mounted within the box end is and forced by {TAIL ~ the spring} into engagement with the ratchet wheel to limit rotary motion of the ratchet wheel inside the box end to one direction 
{ HEAD ~ A toothed arch block } is mounted within the box end is and forced by { TAIL ~ the spring } into engagement with the ratchet wheel to limit rotary motion of the ratchet wheel inside the box end to one direction
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH