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