Fsk system including means for distributing data pulses into two channels to modulate two separate carrier frequencies

Claim 1

IN A DUAL CHANNEL COMMUNICATIONS SYSTEM FOR TRANSMISSION AND RECEPTION OF CODED SIGNALS, THE COMBINATION COMPRISING: (A) A SOURCE OF BINARY CODED SIGNALS; (B) A SYNCHRONOUS DATA TIMER MEANS FOR SUPPLYING TIMING PULSES TO SAID SOURCE OF BINARY CODED SIGNALS TO CAUSE THE BINARY CODED SIGNALS TO BE STEPPED OUT AT A PREDETERMINED FIXED BIT RATE; (C) SIGNAL DIVIDER MEANS; (D) MEANS FOR APPLYING THE BINARY CODED SIGNALS TO SAID SIGNAL DIVIDER MEANS TO DERIVE THEREFROM TWO SEPARATE BINARY CODED SIGNAL BIT STREAMS EACH HAVING ONE HALF OF SAID FIXED BIT RATE; (E) TWO TRANSCEIVERS IN THE DUAL CHANNELS RESPECTIVELY, SAID TRANSCEIVERS HAVING: (1) SIGNAL MODULATORS FOR MODULATING THE TWO BINARY CODED SIGNAL BIT STREAMS ON CARRIERS IN UPPER AND LOWER HALVES OF A VOICE FREQUENCY BAND, AND (2) SIGNAL DEMODULATORS FOR DEMODULATING RECEIVED MODULATED SIGNALS INTO TWO BINARY BIT STREAMS; (F) DELAY MEANS IN CIRCUIT WITH THE DEMODULATORS FOR EQUALIZING THE TIME OF ARRIVAL OF SIGNALS IN BOTH HALF BANDWIDTHS AT THE DEMODULATORS; AND (G) ALIGNMENT MEANS IN CIRCUIT WITH THE TRANSCEIVERS FOR DETERMINING THE TIME DELAY REQUIRED IN SIGNALS IN ONE CHANNEL TO EQUALIZE THE TIME OF ARRIVAL OF SIGNALS AT THE DEMODULATORS IN BOTH CHANNELS.