Error detection and correction system with block synchronization

Claim 1

IN A COMMUNICATION SYSTEM WHEREIN INFORMATION IS TRANSMITTED IN THE FORM OF A PLURALITY OF CHARACTERS, A PREDETERMINED NUMBER OF WHICH CONSTITUTE A MESSAGE BLOCK; A SENDING STATION FOR TRANSMITTING BLOCKS OF INFORMATION AND INCLUDING MEANS FOR STORING AT LEAST ONE BLOCK OF INFORMATION FOLLOWING ITS TRANSMISSION BY THE SENDING STATION; MEANS OPERATED IN RESPONSE TO THE TRANSMISSION OF A PREDETERMINED NUMBER OF CHARACTERS FOR CAUSING THE REMOVAL OF A PREDETERMINED AMOUNT OF INFORMATION FROM THE STORING MEANS AT THE SENDING STATION; A RECEIVING STATION INCLUDING MEANS FOR RECORDING INFORMATION TRANSMITTED BY THE SENDING STATION; MEANS FOR INTERCONNECTING THE SENDING STATION WITH THE RECEIVING STATION OVER A TRANSMISSION LINE; MEANS FOR INTERRUPTING TRANSMISSION AT THE SENDING STATION IN RESPONSE TO LINE DISCONNECTS; MEANS FOR INTERRUPTING THE OPERATION OF THE RECORDING MEANS AT THE RECEIVING STATION IN RESPONSE TO LINE DISCONNECTS; MEANS RESPONSIVE TO RE-ESTABLISHMENT OF LINE CONNECTIONS FOLLOWING LINE DISCONNECTS FOR CAUSING THE SENDING STATION TO RETRANSMIT THE PORTION OF THE INTERRUPTED BLOCK STORED IN THE STORING MEANS FOLLOWED BY TRANSMISSION OF THE REMAINDER OF THE INTERRUPTED BLOCK; AND MEANS RESPONSIVE TO RE-ESTABLISHMENT OF LINE CONNECTIONS FOLLOWING LINE DISCONNECT FOR DELETING THE INTERRUPTED BLOCK AT THE RECEIVER WHILE THE RECORDING MEANS RECORDS THE RETRANSMITTED BLOCK.