wherein operation of the pushbutton causes the link and cam to move, {HEAD ~ the link} moving in {TAIL ~ a direction} about perpendicular to the cams direction of motion 
moving in
wherein operation of the pushbutton causes the link and cam to move , { HEAD ~ the link } moving in { TAIL ~ a direction } about perpendicular to the cams direction of motion
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH