The box end 10 includes cover plate 15, a spring 13 mounted in the box end 10, the spring 13 having {HEAD ~ a first end} and a second end and a toothed arch block 12 mounted within {TAIL ~ the box end} 10 and operatively associated with the ratchet wheel 11 
mounted within
The box end 10 includes cover plate 15 , a spring 13 mounted in the box end 10 , the spring 13 having { HEAD ~ a first end } and a second end and a toothed arch block 12 mounted within { TAIL ~ the box end } 10 and operatively associated with the ratchet wheel 11
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH