As seen in FIGS 2 and 3, a blade support 16 journals a hinge pin 18 which, in {TAIL ~ turn}, pivotally supports {HEAD ~ the blade} 14 
As seen in FIGS 2 and 3 , a blade support 16 journals a hinge pin 18 which , in { TAIL ~ turn } , pivotally supports { HEAD ~ the blade } 14
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH