Pilot network selection systems

Claim 1

IN AN AUTOMATIC TELELPHONE SWITCHING SYSTEM COMPRISING A SWITCHING NETWORK FOR EXTENDING COMMUNICATION PATHS BETWEEN INLETS AND OUTLETS OF SAID SYSTEM, LINES CONNECTED TO SAID INLETS AND JUNCTORS CONNECTED TO SAID OUTLETS, PILOT NETWORK MEANS COMPRISING CIRCUITRY ANALOGOUS TO THE CIRCUITRY IN SAID SWITCHING NETWORK FOR CONTROLLING THE EXTENSION OF SAID PATHS, MEANS RESPONSIVE TO A CALLING CONDITION ON ONE OF SAID LINES FOR MARKING SAID ONE LINE AND ALL AVAILABLE ONES OF SAID JUNCTORS IN SAID SYSTEM AND IN SAID PILOT NETWORK, BINARY EXCLUSION MEANS IN SAID PILOT NETWORK, SAID BINARY EXCLUSION MEANS COMPRISING SCANNING MEANS FOR SCANNING SAID INLETS AND SAID OUTLETS, SAID LOGIC MEANS OPERATED RESPONSIVE TO SAID SCANNING MEANS FOR TRANSMITTING PATH FINDING SIGNALS THROUGH ALL AVAILABLE PATHS IN SAID PILOT NETWORK, DECODING MATRIX MEANS IN SAID SCANNING MEANS FOR CONTROLLING THE TRANSMISSION OF SAID SIGNALS IN SAID PILOT NETWORK, MEANS IN SAID DECODING NETWORK MEANS FOR CONTROLLING THE TRANSMISSION OF BLOCKING SIGNALS THROUGH SAID PILOT NETWORK FOR SUCCESSIVELY BLOCKING FRACTIONAL PORTIONS OF SAID PILOT NETWORK UNTIL ONLY ONE PATH IS SELECTED, MEANS RESPONSIVE TO THE FAILURE TO RECEIVE SAID SIGNALS FOR UNBLOCKING THE LAST FRACTIONAL PORTION BLOCKED AND BLOCKING A SUCCESSIVE FRACTIONAL PORTION UNTIL ONLY ONE PATH IS SELECTED THROUTH SAID NETWORK, AND MEANS RESPONSIVE TO SELECTING SAID ONE PATH FOR SWITCHING THROUGH A PATH IN SAID SWITCHING NETWORK ANALOGOUS TO SAID SELECTED PATH IN SAID CIRCUIT NETWORK.