A coil spring, supported at one end from {TAIL ~ the frame}, provides a predetermined force in a direction generally transverse to {HEAD ~ the axis} of the elongated flexible member under test 
A coil spring , supported at one end from { TAIL ~ the frame } , provides a predetermined force in a direction generally transverse to { HEAD ~ the axis } of the elongated flexible member under test
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH