Serial to diplex conversion system

Claim 1

A PHASE SHIFT COMMUNICATION TRANSMITTER FOR NONSYNCHRONOUS OPERATION WHEREIN A SINGLE FREQUENCY CARRIER IS TRANSMITTED IN FIVE DISCRETE PHASES SHIFTED ACCORDING TO A FOUR LEVEL DATA SIGNAL, COMPRISING MEANS SUPPLYING A SERIES OF MARK AND SPACE SIGNAL IN THE FORM OF A SERIAL BINARY SIGNAL TRAIN, MEANS GENERATING AN INVERTED REPLICA OF SAID SIGNAL TRAIN, CLOCK SIGNAL GENERATING MEANS HAVING A REPETITION RATE EQUAL TO THE MAXIMUM RATE OF SAID MARK AND SPACE SIGNALS, COMBINING MEANS OPERATING TO DERIVE FROM SAID CLOCK SIGNAL AND SAID GENERATED AND SUPPLIED TRAINS TWO SIMULTANEOUS MARK AND SPACE DATA SIGNALS OF HALF SAID RATE, OF WHICH A FIRST INCLUDES THE MARK AND SPACE INFORMATION AT ALTERNATE CLOCK SIGNAL INTERVALS IN SAID SERIAL TRAIN AND A SECOND INCLUDES THE REMAINING MARK AND SPACE SIGNALS IN SAID SERIAL TRAIN, MEANS OPERATIVE TO COMBINE SAID SIMULTANEOUS SIGNALS TO PRODUCE PHASE SHIFTS OF SAID CARRIER AT HALF SAID MAXIMUM RATE IN WHICH EACH PHASE SHIFT APPROXIMATER AN INTEGRAL MULTIPLE OF ONE-FIFTY CYCLE OF THE CARRIER, SELECTED ACCORDING TO THE FOUR POSSIBLE COMBINATIONS OF MARK AND SPACE IN SAID TWO CHANNELS, AND TRANSMITTER OUTPUT MEANS IN WHICH SAID PHASE SHIFT MODULATIONS ARE APPLIED TO SAID COMMUNICATION WAVE AS A FOUR LEVEL SIGNAL.