That is, {TAIL ~ the lever} 74 must have a total increment of {HEAD ~ 156 degrees} of rotation or oscillation to produce one degree of turning of the intermediate member 28, and hence of the shaft 60 
That is , { TAIL ~ the lever } 74 must have a total increment of { HEAD ~ 156 degrees } of rotation or oscillation to produce one degree of turning of the intermediate member 28 , and hence of the shaft 60
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH