Electronic telephone system

Claim 1

IN AN AUTOMATIC TELEPHONE EXCHANGE OF THE KIND INCLUDING CONDUCTORS EACH CAPABLE OF SIMULTANEOUSLY TRANSMITTING SEVERAL VOICE CONNECTIONS UP TO A PREDTERMINED MAXIMUM NUMBER AND ALSO INCLUDING A PULSE SENDER SENDING REGULARLY TRAINS OF SHORT CURRENT PULSES, EACH TRAIN BEING COMPOSED OF A NUMBER OF PULSES CORRESPONDING TO SAID MAXIMUM NUMBER, EACH VOICE CONNECTION BEING CLOSED THROUGH ONE OF SAID CONDUCTORS ONLY WHEN A PULSE HAS A PREDETERMINED PULSE POSITION IN EACH OF SAID TRAINS IN THE SEQUENCE OF PULSE TRAINS APPEARING DURING A VOICE CONNECTION; SEVERAL GROUPS OF LINES AND A PRIMARY CONDUCTOR COMMON TO EACH GROUP OF LINES; AN INDIVIDUAL SWITCH CONTACT FOR EACH LINE IN SAID GROUPS, SAID SWITCH CONTACTS, DURING A VOICE CONNECTION, CONNECTING THE RESPECTIVE LINE TO THE PRIMARY CONDUCTOR OF THE RESPECTIVE GROUP DURING INTERVALS OF TIME CORRESPONDING TO THE PULSES OF THE VOICE CONNECTION; A PRIMARY MEMORY MEANS FOR EACH INDIVIDUAL SWITCH CONTACT CONTROLLING THE MAKE AND BREAK OF THE SWITCH CONTACT IN TIME RELATIONSHIP WITH THE PULSES OF THE VOICE CONNECTION CONNECTED TO THE LINE ASSOCIATED WITH THE RESPECTIVE SWITCH CONTACT; A MARKING MEANS FOR SETTING UP VOICE CONNECTIONS BETWEEN SAID LINES THROUGH SAID CONDUCTORS, SAID VOICE CONNECTIONS BEING SET UP IN CIRCUITS INCLUDING SAID INDIVIDUAL SWITCH CONTACTS AND SAID PRIMARY CONDUCTORS, SAID PRIMARY CONDUCTORS BEING GROUPED IN PRIMARY GROUPS; A PLURALITY OF SECONDARY CONDUCTORS ALLOCATED TO EACH OF SAID PRIMARY GROUPS, EACH OF SAID SECONDARY CONDUCTORS BEING CAPABLE OF TRANSMITTING A PLURALITY OF SIMULATANEOUS SET UP VOICE CONNECTIONS UNDER THE CONTROL OF THE PULSES SENT BY SAID PULSE SENDER; SECONDARY SWITCH CONTACTS FOR CONNECTING EACH OF SAID SECONDARY CONDUCTORS TO A PRIMARY CONDUCTOR WITHIN THE RESPECTIVE PRIMARY GROUP AND OTHER SECONDARY SWITCH CONTACTS FOR CONNECTING A SECONDARY CONDUCTOR ALLOCATED TO ONE PRIMARY GROUP TO AT LEAST ONE SECONDARY CONDUCTOR ALLOCATED TO ANOTHER PRIMARY GROUP; A SECOND MEMORY MEANS FOR EACH OF SAID SECONDARY SWITCH CONTACTS CONTROLLING THE MAKE AND BREAK OF THE RESPECTIVE SECONDARY SWITCH CONTACT IN TIME RELATIONSHIP WITH THE TIME PULSES OF EVERY VOICE CONNECTION THE CIRCUIT OF WHICH INCLUDES SECONDARY SWITCH CONTACTS, SAID MARKING MEANS WHEN SETTNG UP A VOICE CONNECTION BETWEEN TWO LINES THROUGH A PRIMARY CONDUCTOR IN ONE PRIMARY GROUP FIRST AND A PRIMARY CONDUCTOR IN ANOTHER PRIMARY GROUP FIRST SELECTING IN SAID TRAINS OF SHORT PULSES A PULSE POSITION FREE FOR BOTH SAID PRIMARY CONDUCTORS AND SIMULTANEOUSLY FREE FOR TWO SECONDARY CONDUCTORS ALLOCATED TO ONE OF EACH OF SAID PRIMARY GROUPS AND JOINED BY ONE OF SAID OTHER SECONDARY SWITCH CONTACTS, SAID SELECTED SECONDARY CONDUCTORS BEING CONNECTED TOGETHER AND TO THE RESPECTIVE PRIMARY CONDUCTORS ACROSS THE CORRESPONDING SECONDARY SWITCH CONTACTS AND THEN SETTING THE MEMORY MEANS FOR SAID INDIVIDUAL SWITCH CONTACTS AND THE MEMORY MEANS ALLOCATED TO SAID SECONDARY SWITCH CONTACTS CONTROLLING THE MAKE AND BREAK OF THE RESPECTIVE SWITCH CONTACTS IN TIMED RELATIONSHIP WITH THE PULSES IN SAID SELECTED PULSE POSITION.