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