Gravity flexes {HEAD ~ the opposite end} of the beam or wire into {TAIL ~ contact} with the tubular case, creating a closed electrical circuit 
Gravity flexes { HEAD ~ the opposite end } of the beam or wire into { TAIL ~ contact } with the tubular case , creating a closed electrical circuit
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH