{HEAD ~ a timing circuit} in electrical communication with said output means of said {TAIL ~ electrical energy source} 
{ HEAD ~ a timing circuit } in electrical communication with said output means of said { TAIL ~ electrical energy source }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL