a second housing pivotally connected to said first housing for {HEAD ~ movement} about a first axis between {TAIL ~ an erected operative position} and a folded inoperative position 
between
a second housing pivotally connected to said first housing for { HEAD ~ movement } about a first axis between { TAIL ~ an erected operative position } and a folded inoperative position
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH