angular position determining {HEAD ~ means} connected to said {TAIL ~ engaging means} for rotation therewith and for providing an indication of the angular position of said engaging means; and 
connected to
angular position determining { HEAD ~ means } connected to said { TAIL ~ engaging means } for rotation therewith and for providing an indication of the angular position of said engaging means ; and
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH