{HEAD ~ The support shaft} 50 defines an elongate slot 52 longitudinally therealong for engaging the end of {TAIL ~ a spring}, as to be described below 
{ HEAD ~ The support shaft } 50 defines an elongate slot 52 longitudinally therealong for engaging the end of { TAIL ~ a spring } , as to be described below
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH