The improvement 2 wherein {HEAD ~ said arm one end portion} is angled for {TAIL ~ pivoted support} by said housing 
The improvement 2 wherein { HEAD ~ said arm one end portion } is angled for { TAIL ~ pivoted support } by said housing
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH