Circuit arrangement in an automatic telephone system for rendering the subscriber's number independent of his location in the selector multiple

Claim 1

IN A TELEPHONE SYSTEM AN EXCHANGE UNIT COMPRISING, IN COMBINATION, A PLURALITY OF LINE-SELECTOR GROUPS, EACH OF SAID GROUPS INCLUDING A MULTIPLE FOR SUBSCRIBERS'' LINES AND SUBSCRIBERS'' LINES CONNECTED THERETO, A PLURALITY OF IDENTIFIERS FOR SAID LINE-SELECTOR GROUPS, EACH OF SAID IDENTIFIERS INCLUDING AN ARRAY OF CROSSING WIRES, EACH CROSSING POINT OF SAID WIRES CORRESPONDING TO A PREDETERMINED TERMINAL OF A MULTIPLE, A PLURALITY OF RELAYS EACH CONNECTED TO ONE OF SAID WIRES IN CIRCUITS SUCH THAT THE POTENTIAL CONDITION APPEARING IN RESPONSE TO ANY OF THE SUBSCRIBER''S LINES BEING IN CALLING CONDITION CAUSES ENERGIZING OF A PREDETERMINED COMBINATION OF TWO OF SAID RELAYS, EACH OF SAID PREDETERMINED COMBINATIONS BEING INDICATIVE OF THE MULTIPLE LINE TERMINAL TO WHICH THE LINE IN CALLING CONDITION IS CONNECTED, A MARKER COMMON TO A NUMBER OF SAID LINE-SELECTOR GROUPS FOR CONTROLLING THE SETTING UP OF TRAFFIC CONNECTIONS THROUGH THE LINE-SELECTOR GROUPS INCLUDED IN SAID NUMBER, A NUMBER-SELECTOR HAVING A PLURAITY OF OUTLETS EACH CORRESPONDING TO A DIRECTORY NUMBER ASSIGNED TO SAID EXCHANGE UNIT, INTERCONNECTING MEANS FOR CONNECTING EACH ONE OF SAID OUTLETS OF THE NUMBER- SELECTOR TO ANY ONE OF THE WIRE CROSSING POINTS OF ANY ONE OF SAID IDENTIFIERS IN A MANNER SUCH THT A POTENTIAL AT AN OUTLET CORRESPONDING TO A SPECIFIC ONE OF SAID DIRECTORY NUMBERS CAUSES ENERGIZING OF THE SAME COMBINATION OF TWO RELAYS AS IS ENERGIZED BY A POTENTIAL APPEARING AT A SUBSCRIBER''S LINE ASSIGNED TO SAID SPECIFIC DIRECTORY NUMBER, AND A RECEIVER MEANS FOR RECEIVING SIGNALS REPRESENTING DIGIT INFORMATION CONSTITUTING PART OF THE DIRECTORY NUMBER OF A CALLED SUBSCRIBER''S LINE, SAID RECEIVER MEANS BEING CONNECTED IN CIRCUIT WITH SAID NUMBER-SELECTOR TO APPLY TO THE OUTLET CORRESPONDING TO THE DIRECTORY NUMBER OF THE CALLED SUBSCRIBER''S LINE A POTENTIAL ENERGIZING THE RESPECTIVE COMBINATION OF RELAYS INDICATIVE OF THE CALLED SUBSCRIBER''S LINE IN THE RESPECTIVE IDENTIFIER, SAID IDENTIFIERS BEING CONNECTED WITH THE MARKER IN CIRCUITS IN WHICH THE RESPECTIVE IDENTIFIER OPERATES THE MARKER TO INDICTE THE FINAL SELECTOR GROUP TO WHICH THE RESPECTIVE IDENTIFIER IS CONNECTED.