Carrier phase modulated dual purpose communication system

Claim 1

MEANS FOR RECEIVING FIRST AND SECOND PULSED TELETYPE SIGNALS, EACH OF SAID PULSED SIGNALS CONTAINING A PREDETERMINED COMPONENT OF THE SAME FREQUENCY, THE FREQUENCY OF SAID COMPONENT BEING RELATED TO THE TELETYPE CHARACTER REPETITION RATE, THE CARRIER OF EACH OF SAID PULSED TELETYPE SIGNALS BEING REPETITIVELY PHASE SHIFTED FROM ONE TO THE OTHER OF TWO QUADRATURE PHASE VALUES WHEREBY THE SAME PHASE VALUES OF EACH CARRIER RECUR AT THE FREQUENCY OF SAID PREDETERMINED COMPONENT, SAID MEANS FOR RECEIVING COMPRISING FIRST AND SECOND PHASE SENSITIVE MEANS FOR DETECTING RESPECTIVE ONES OF SAID FIRST AND SECOND PULSED TELETYPE SIGNALS; EACH SAID PHASE SENSITIVE MEANS INCLUDING A SOURCE OF REFERENCE SIGNAL AT THE CARRIER FREQUENCY OF A RESPECTIVE PULSED TELETYPE SIGNAL, AND MEANS FOR PRODUCING A QUADRATURE RELATIONSHIP BETWEEN THE PHASE OF SAID REFERENCE SIGNAL AND ONE OF SAID TWO PHASE VALUES OF THE CARRIER OF SAID RESPECTIVE PULSED TELETYPE SIGNAL; A SOURCE OF THIRD SIGNALS HAVING THE SAME FREQUENCY AS SAID PREDETERMINED SIGNAL COMPONENT, MEANS CONNECTED TO SAID FIRST PHASE SENSITIVE MEANS AND TO SAID SOURCE OF SAID THIRD SIGNALS FOR SYNCHRONIZING SAID THIRD SIGNALS TO SAID PREDETERMINED SIGNAL COMPONENT OF SAID FIRST PULSED TELETYPE SIGNAL, PHASE SHIFTING MEANS CONNECTED TO SAID SOURCE OF SAID THIRD SIGNALS FOR PHASE SHIFTING SAID THIRD SIGNALS, MEANS CONNECTED TO SAID SECOND PHASE SENSITIVE MEANS AND TO SAID PHASE SHIFTING MEANS FOR SYNCHRONIZING THE PHASE SHIFTED THIRD SIGNALS TO SAID PREDETERMINED SIGNAL COMPONENT OF SAID SECOND PULSED TELETYPE SIGNAL, MEANS FOR INDICATING THE AMOUNT OF PHASE SHIFT INTRODUCED BY SAID MEANS FOR PHASE SHIFTING, AND MEANS FOR SEPARATELY DEMODULATING EACH SAID FIRST AND SECOND PULSED TELETYPE SIGNALS TO EXTRACT THE MESSAGE DATA CONVEYED THEREBY.