The circular cam surface 30 of the flange 27 of U plate 24 circles about screw 28 and extends or {TAIL ~ projects} in one direction on one portion 30 of the circle and {HEAD ~ projects} in the opposite direction in the opposing portion 30 of the circle 
The circular cam surface 30 of the flange 27 of U plate 24 circles about screw 28 and extends or { TAIL ~ projects } in one direction on one portion 30 of the circle and { HEAD ~ projects } in the opposite direction in the opposing portion 30 of the circle
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 OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH