Auxiliary apparatus for teletypers

Claim 1

APPARATUS FOR THE AUTOMATIC CODING OR DECODING OF MESSAGES CONSTITUTED BY SUCCESSIVE ELECTRIC SIGNALS IN TELETYPEWRITING SYSTEMS COMPRISING AN INPUT CONDUCTOR FOR CONNECTION WITH A TELETYPEWRITING UNIT, AND OUTPUT CONDUCTOR FOR CONNECTION WITH A TRANSMISSION LINE, A REPEATER DEVICE HAVING AN INPUT AND AN OUTPUT AND INCLUDING SIGNAL MODIFYING MEANS FOR TRANSMITTING SIGNALS IN SELECTIVELY MODIFIED FORM FROM SAID INPUT TO SAID OUTPUT, BY-PASS CONDUCTOR MEANS FOR TRANSMITTING SUCH SIGNALS IN UNMODIFIED FORM FROM SAID INPUT TO SAID OUTPUT, BY-PASSING SWITCH MEANS FOR SELECTIVELY CONNECTING IN A FIRST POSITION SAID SIGNAL MODIFYING MEANS AND AND IN A SECOND POSITION SAID BY-PASS CONDUCTOR MEANS BETWEEN SAID INPUT AND SAID OUTPUT, AND MEANS FOR SENSING THE OPERATIVE OR INOPERATIVE CONDITION OF SAID REPEATER DEVICE, SAID APPARATUS FURTHER COMPRISING REVERSING SWITCH MEANS CONNECTED BETWEEN SAID INPUT CONDUCTOR AND SAID REPEATER INPUT AND BETWEEN SAID REPEATER OUTPUT AND SAID OUTPUT CONDUCTOR FOR SELECTIVELY CONNECTING IN A FIRST POSITION SAID INPUT CONDUCTOR TO SAID REPEATER INPUT AND SAID REPEATER OUTPUT TO SAID OUTPUT CONDUCTOR, AND IN A SECOND POSITION SAID OUTPUT CONDUCTOR TO SAID REPEATER INPUT AND SAID REPEATER OUTPUT TO SAID INPUT CONDUCTOR WHILE DISCONNECTING SAID INPUT CONDUCTOR FROM SAID REPEATER INPUT AND SAID REPEATER OUTPUT FROM SAID OUTPUT CONDUCTOR, MEANS CONNECTED AT SAID REPEATER OUTPUT AND RESPONSIVE TO AT LEAST ONE PREDETERMINED SIGNAL COMING IN THROUGH SAID OUTPUT CONDUCTOR FOR AUTOMATICALLY THROWING SAID REVERSING SWITCH MEANS FROM ITS SAID FIRST POSITION INTO ITS SAID SECOND POSITION ON RECEPTION OF SAID PREDETERMINED SIGNAL, AND CONDITIONABLE BY SAID REPEATER OPERATION SENSING MEANS FOR AUTOMATICALLY THROWING SAID BY-PASSING SWITCH MEANS FROM ITS SAID FIRST POSITION INTO ITS SAID SECOND POSITION ON RECEPTION OF SAID PREDETERMINED SIGNAL WHILE SAID REPEATER DEVICE IS IN ITS SAID OPERATIVE CONDITION.