Switch controlled gating network

Claim 1

A MULTIPLE INPUT GATING NETWORK FOR PRODUCING AN ELECTRICAL OUTPUT SIGNAL WHENEVER A PLURALITY OF INPUT CONDITIONS, EXPRESSIBLE BY THE CLOSURE OF AT LEAST ONE ELECTRICAL SWITCH AND THE RECEIPT OF HIGH LEVEL INPUT SIGNALS FROM A PLURALITY OF INPUT SIGNAL SOURCES, ARE SATISFIED, SAID GATING CIRCUIT COMPRISING: AN "AND" GATE CIRCUIT HAVING AN OUTPUT TERMINAL AND N INPUT TERMINALS, SAID GATING CIRCUIT BEING RESPONSIVE TO THE SIMULTANEOUS APPLICATION OF HIGH LEVEL INPUT SIGNALS TO ALL OF SAID N INPUT TERMINALS FOR PRODUCING A HIGH LEVEL OUTPUT SIGNAL; MEANS FOR INTERCOUPLING THE 1ST ... (N-1)TH INPUT TERMINAL TO A CORRESPONDING PLURALITY OF TWO-LEVEL INPUT SIGNAL SOURCES; A MECHANICAL SWITCH HAVING AN OPEN POSITION AND A CLOSED POSITION AND AT LEAST A PAIR OF TERMINALS, SAID PAIR OF TERMINALS BEING ELECTRICALLY INTERCONNECTED WHEN SAID SWITCH IS IN ITS CLOSED POSITION AND DISCONNECTED WHEN SAID SWITCH IS IN ITS OPEN POSITION; MEANS FOR INTERCONNECTING ONE OF SAID PAIR OF TERMINALS OF SAID SWITCH TO THE NTH INPUT TERMINAL OF SAID "AND" GATE; IMPEDANCE MEANS FOR APPLYING A RELATIVELY LOW LEVEL VOLTAGE TO SAID ONE TERMINAL OF SAID PAIR OF TERMINALS; AND MEANS FOR INTERCONNECTING THE OTHER OF SAID PAIR OF TERMINALS TO A TWO-LEVEL INPUT SIGNAL SOURCE WHEREBY SAID GATING CIRCUIT PRODUCES A HIGH LEVEL OUTPUT SIGNAL ONLY WHEN THE INPUT SIGNALS FROM ALL OF SAID INPUT SIGNAL SOURCES ARE AT THEIR HIGH LEVEL VALUE AND SAID SWITCH IS CLOSED.