{HEAD ~ The second end} of the spring is coupled, by {TAIL ~ means} of a movable carriage, to the elongated flexible member 
is coupled by
{ HEAD ~ The second end } of the spring is coupled , by { TAIL ~ means } of a movable carriage , to the elongated flexible member
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH