Central to remote interrogation system

Claim 1

A COMMUNICATION SYSTEM COMPRISING: A PLURALITY OF INDIVIDUALLY CODED SLAVE STATIONS EACH INCLUDING PASSIVE CIRCUIT MEANS FOR DEVELOPING TWO GROUPS OF BI-POLAR TIME SPACED PULSES IN RESPONSE TO A RECEIVED INTERROGATING SIGNAL, ONE GROUP REPRESENTING SPECIFIC DATA ASSOCIATED WITH AN INDIVIDUAL SLAVE STATION BINARY FROM AND THE OTHER GROUP REPRESENTING A CONTROL SIGNAL MARKING THE SPACES BETWEEN SAID DATA PULSES; MEANS FOR TRANSMITTING SAID DATA AND CONTROL SIGNAL PULSES ON FIRST AND SECOND PAIRS OF POLARITYORIENTED FREQUENCIES RESPECTIVELY: AND AT LEAST ONE MASTER STATION INCLUDING MEANS FOR INTERROGATING SAID SLAVE STATION; MEANS FOR ALTERNATELY RECEIVING SAID DATA AND CONTROL SIGNAL PULSES RESPECTIVELY; MEANS FOR SELECTIVELY ROUTING AND STORING SAID RECEIVING BINARY DATA; MEANS RESPONSIVE TO RESPECTIVE RECEIVED DATA AND COTROL SIGNAL PULSES FOR DETERMINING THE CORRESPONDENCE BETWEEN THE PULSES DEVELOPED AND TRANSMITTED BY THE INTERROGATED SLAVE STATION AND THE PULSES RECEIVED BY THE MASTER STATION; MEANS RESPONSIVE TO ERROR SIGNALS DEVELOPED BY SAID LAST MENTIONED MEANS FOR CAUSING THE RE-INTERROGATION OF SAID SLAVE STATION; MEANS RESPONSIVE TO SAID ERROR SIGNALS AND TO A SIGNAL SIGNIFYING THE COMPLETION OF A SUCCESSFUL DATA RECEPTION OR RETURNING THE MASTER STATION EQUIPMENT TO ITS INITIAL OPERATING CONDITION.