Pivot pins are loosely received in respective, preferably triangular, apertures for connecting the ears of the lid member with the casing to permit {HEAD ~ pivoting} of the lid member and {TAIL ~ its bodily displacement relative} to the casing in directions at right angles to the pivoting axis 
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Pivot pins are loosely received in respective , preferably triangular , apertures for connecting the ears of the lid member with the casing to permit { HEAD ~ pivoting } of the lid member and { TAIL ~ its bodily displacement relative } to the casing in directions at right angles to the pivoting axis
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH