Di-phase receiver and repeater terminal

Claim 1

A RECEIVER TERMINAL FOR A DIPHASE SIGNAL, COMPRISING: RECEIVER INPUT MEANS FOR RECEIVING A DIPHASE SIGNAL PRODUCED FROM A CARRIER OF FREQUENCY EQUAL TO A PREDETERMINED CLOCK RATE, SAID CARRIER BEING APPLIED IN DIRECT OR REVERSED PHASE UNDER CONTROL OF A BINARY INFORMATION SIGNAL AT SAID CLOCK RATE TO PRODUCE OTHER COMPONENTS OF FREQUENCY HALF SAID CLOCK RATE, THE COMBINED DIRECT AND REVERSED WAVES INVOLVING RESULTANT POLARITY TRANSITIONS, AND TRANSMITTED OVER A CHANNEL WHICH ATTENUATES SAID CARRIER COMPONENTS TO AN AMPLITUDE SUBSTANTIALLY LESS THAN SAID HALF FREQUENCY COMPONENTS, ABSOLUTE VALUE DETECTOR MEANS TO CONVERT BOTH POLARITIES OF RECEIVED SIGNAL TO A COMMON POLARITY, WITH HIGH AMPLITUDE PULSES CORRESPONDING TO EACH CHANGE OF CARRIER PHASE AND LOW AMPLITUDE RIPPLE CORRESPONDING TO DOUBLE THE CARRIER FREQUENCY, MEANS TO EXTRACT THE DOUBLE FREQENCY OF SAID RIPPLE AND SIMILAR COMPONENT OF SAID PULSES TO PROVIDE A RETIMING WAVE FOR SAID RECEIVER AND MEANS RESPONSIVE TO SAID HIGH AMPLITUDE PULSES TO IDENTIFY THE INFORMATION SIGNAL AND CONVERT IT TO A RECTANGULAR BINARY WAVE.