The output side of the current meters are connected to a logic element that is provided for combining the partial currents and which provides {TAIL ~ a logic signal} that is a function of {HEAD ~ their combination} 
The output side of the current meters are connected to a logic element that is provided for combining the partial currents and which provides { TAIL ~ a logic signal } that is a function of { HEAD ~ their combination }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD