Automatic telephone systems

Claim 1

IN AN AUTOMATIC TELEPHONE EXCHANGE, A CROSSBAR SWITCH SELECTOR HAVING A PLURALITY OF BRIDGES, A FIRST GROUP OF SELECT MAGNETS, A SECOND GROUP OF SELECT MAGNETS, A PLURALITY OF BRIDGE MAGNETS, A PLURALITY OF MULTI-CONDUCTOR INLETS, ONE FOR EACH BRIDGE, EACH INLET BEING MULITPLED TO CROSSPOINTS INDIVIDUALLY CONTROLLED BY SAID FIRST GROUP OF SELECT MAGNETS, A PLURALITY OF MULTI-CONDUCTOR OUTLETS DIVIDED INTO TWO GROUPS, EACH OUTLET HAVING A MARKING CONDUCTOR AND A PLURALITY OF CONDUCTORS MULITPLED TO CORRESPONDING CROSSPOINTS OF ALL THE BRIDGES, THE MULTIPLED CROSSPOINTS SERVING AT LEAST TWO OUTLETS, TWO DISCRIMINATING RELAYS, ONE FOR EACH GROUP OF OUTLETS, MEANS RESPONSIVE WHEN AN INLET OF THE SELECTOR IS TAKEN INTO USE FOR OPERATING ONE ONLY OF SAID DISCRIMINATING RELAYS, MEANS RESPONSIVE TO THE OPERATION OF SAID ONE DISCRIMINATING RELAY FOR EXTENDING THE MARKING CONDUCTORS OF THE OUTLETS RELEVANT TO SAID ONE DISCRIMINATING RELAY TO SAID FIRST GROUP OF SELECT MAGNETS, AND FOR OPERATING ONE OF SAID FIRST GROUP OF SELECT MAGNETS IN A MUTUALLY EXCLUSIVE MANNER IN RESPONSE TO THE APPLICATION OF MARKING POTENTIALS TO ANY OF THE SAID OUTLETS RELEVANT TO SAID ONE DISCRIMINATING RELAY, A SWITCHING DEVICE ASSOCIATED WITH EACH MAGNET OF SAID FIRST GROUP OF SELECT MAGNETS AND OPERATED WHEN THE ASSOCIATED SELECT MAGNET IS OPERATED AND MEANS RESPONSIVE TO THE OPERATION OF ANY ONE SWITCHING DEVICE FOR EXTENDING THE MARKING CONDUCTORS OF THE OUTLETS RELEVANT TO SAID ONE DISCRIMINATING RELAY AND RELEVANT TO THE OPERATED SWITCHING DEVICE TO THE APPROPRIATE MAGNETS OF SAID SECOND SET OF SELECT MAGNETS AND FOR OPERATING IN A MUTUALLY EXCLUSIVE MANNER ONE SELECT MAGNET OF SAID SECOND GROUP OF SELECT MAGNETS RELEVANT TO ONE OF SAID LAST MENTIONED OUTLETS WHEREBY THE OPERATION OF THE BRIDGE MAGNET RELEVANT TO SAID ONE INLET SERVES TO CONNECT SAID ONE INLET TO SAID ONE OUTLET.