{TAIL ~ A mechanism} 1, wherein the pivotally mounted arm is carried by {HEAD ~ an angularly resilient pivot} 
{ TAIL ~ A mechanism } 1 , wherein the pivotally mounted arm is carried by { HEAD ~ an angularly resilient pivot }
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD