Line telegraph system with error correction

Claim 1

AN ERROR CORRECTION SYSTEM FOR THE TELECOMMUNICATION OF MULTI-ELEMENT BINARY CODE SIGNALS, WHICH BINARY CODE ELEMENTS COMPRISE "STOP" AND "START" SIGNALS OF DIFFERENT POTENTIALS, SAID SYSTEM BEING FOR A LINE TELEGRAPH SYSTEM HAVING RELAYS A1, A2, B1, B2 WHICH TRANSMIT SAID "START" AND "STOP" SIGNAL ELEMENT IN ONE DIRECTION AT A TIME BETWEEN TWO STATIONS, SAID SYSTEM COMPRISING: (A) A TRANSMITTER AND A RECEIVER AT EACH STATION A AND B, (B) MEANS 2 FOR STORING A PREDETERMINED NUMBER OF SIGNALS AT EACH TRANSMITTER AFTER SAID NUMBER OF SIGNALS HAVE BEEN TRANSMITTED, (C) RELAY MEANS (A2, B2) IN EACH RECEIVER FOR MAINTAINING THAT RECEIVER IN ITS "STOP" SIGNAL POTENTIAL CONDITION DURING RECEPTION OF BOTH "START" AND "STOP" SIGNAL ELEMENTS BY EACH RECEIVER, (D) MEANS 4'' FOR TESTING THE CORRECTNESS OF EACH SIGNAL AS IT IS RECEIVED BY EACH RECEIVER, (E) THE IMPROVEMENT COMPRISING: MEANS RESPONSIVE TO SAID TESTING MEANS FOR TESTING AN INCORRECTLY RECEIVED SIGNAL FOR SWITCH MEANS 8'', RQ OPERATING SAID RELAY MEANS FOR CHANGING THE "STOP" SIGNAL POTENTIAL CONDITION TO A "START" SIGNAL POTENTIAL CONDITION FOR A DURATION OF TIME BETWEEN THAT OF A SIGNAL ELEMENT AND A MULTI-ELEMENT SIGNAL, REGARDLESS OF WHETHER "STOP" OR "START" SIGNAL ELEMENTS ARE BEING RECEIVED, (F) MEANS 7 FOR DETECTING SAID CHANGE IN POTENTIAL CONDITION OF SAID RECEIVER AT SAID TRANSMITTER, AND (G) MEANS 8 TO REPEAT SAID PREDETERMINED NUMBER OF STORED SIGNALS FROM SAID TRANSMITTER IN RESPONSE TO SAID DETECTING MEANS DETECTING SAID CHANGE IN CONDITION IN SAID RECEIVER.