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