A stub shaft 53 extends through the flanges 51 and 52 to form {HEAD ~ a hinged connection} between the frame 20 and {TAIL ~ the plate} 48,  
A stub shaft 53 extends through the flanges 51 and 52 to form { HEAD ~ a hinged connection } between the frame 20 and { TAIL ~ the plate } 48 ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH