System and method of code communication

Claim 1

A CODE COMMUNICATION SYSTEM FOR THE TRANSMISSION OF SEVERAL SUCCESSIVE CODE ELEMENTS IN A BINARY CODE BY FREQUENCY SHIFT CARRIER APPLIED TO A COMMUNICATION CHANNEL COMPRISING: (A) DRIVER MEANS FOR GENERATING A SERIES OF PULSES CORRESPONDING TO THE BITS OF A CODE, (B) ENCODER MEANS FOR SELECTING A SERIES OF FIRST AND SECOND TYPE CODE ELEMENTS FOR TRANSMISSION, (C) TRANSMITTING MEANS CONTROLLED JOINTLY BY SAID DRIVER MEANS AND SAID ENCODER MEANS FOR TRANSMITTING A SELECTED GIVEN CARRIER FREQUENCY OR A HIGH OR LOW SHIFT FROM SAID GIVEN CARRIER FREQUENCY IN ACCORDANCE WITH THE SERIES OF FIRST AND SECOND TYPE CODE ELEMENTS SELECTED BY SAID ENCODER MEANS, (D) SAID TRANSMITTING MEANS BEING EFFECTIVE TO TRANSMIT A HIGH SHIFT FREQUENCY FOR EACH OF THE FIRST TYPE OF ELEMENTS SELECTED BY SAID ENCODER MEANS AND A LOW SHIFT FREQUENCY FOR EACH OF THE SECOND TYPE OF ELEMENTS SELECTED BY SAID ENCODER MEANS, ONLY PROVIDED THAT THE SAME FREQUENCY HAS NOT BEEN TRANSMITTED AS THE NEXT PRECEDING BIT OF THE CODE, AND (E) SAID CARRIER TRANSMITTING MEANS BEING EFFECTIVE TO TRANSMIT SAID CARRIER FREQUENCY FOR A SECOND ELEMENT OF THE SAME TYPE IN THE SERIES OF CODE ELEMENTS.