{HEAD ~ Whenever the force} of {TAIL ~ gravity lessens}, the second end of the beam or wire breaks contact with the tube, creating an open switch 
{ HEAD ~ Whenever the force } of { TAIL ~ gravity lessens } , the second end of the beam or wire breaks contact with the tube , creating an open switch
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH