A pivoting ball support is rotated and displaced as the ball enters the device, and is returned to a position whereby {HEAD ~ the ball} is prevented from exiting {TAIL ~ the device} 
is prevented from exiting
A pivoting ball support is rotated and displaced as the ball enters the device , and is returned to a position whereby { HEAD ~ the ball } is prevented from exiting { TAIL ~ the device }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL