Pulse code modulation transmission system

Claim 1

IN A SYSTEM FOR TRANSMITTING A VARYING ELECTRICAL MAGNITUDE BEING SUBJECT TO BOTH RELATIVELY SMALL AND SLOW AND RELATIVELY LARGE AND RAPID VARIATIONS BY MEANS OF PULSE CODE MODULATION COMPRISING MEANS FOR PERIODICALLY SAMPLING THE INSTANTANEOUS VALUES OF SAID MAGNITUDE AT A PREDETERMINED SAMPLING FREQUENCY, ANALOGDIGITAL ENCODING MEANS TO CONVERT THE SAMPLING VALUES INTO A CONTINUOUS PRIMARY SERIES OF CONSECUTIVE GROUPS OF BINARY DIGIT PULSES REPRESENTING BINARY NUMBERS PROPORTIONAL TO THE RESPECTIVE SAMPLING VALUES, EACH OF SAID GROUPS HAVING A PREDETERMINED DIGIT NUMBER CORRESPONDING TO A DESIRED MAXIMUM CONVERSION ACCURACY OF THE RESPECTIVE SAMPLING VALUES AND RESULTING IN A PREDETERMINED PULSE REPETITION FREQUENCY OF SAID PRIMARY SERIES, SYNCHRONOUS PULSE DELAY MEANS FOR DISPLACING PREDETERMINED PULSES FOLLOWING THE FIRST PULSE OF SPACED GROUPS OF SAID SERIES RECURRING IN PREDETERMINED ORDER SUCH AS TO PRODUCE A SERIES OF SECONDARY DIGIT PULSES FROM SAID PRIMARY SERIES HAVING A REPETITION FREQUENCY BEING A PREDETERMINED FRACTION OF SAID PRIMARY PULSE REPETITION FREQUENCY AND INCLUDING COMPONENTS REPRESENTATIVE OF AT LEAST ONE RELATIVELY COARSELY QUANTIZED SIGNAL OF LOW TIME CONSTANT CONSTITUTED BY THE FIRST DIGIT OF EACH OF SAID GROUPS AND ONE RELATIVELY FINELY QUANTIZED SIGNAL OF RELATIVELY LARGE TIME CONSTANT AND CONSTITUTED BY SUBSTANTIALLY ALL THE DIGIT PULSES SAID GROUPS, RESPECTIVELY, MEANS TO TRANSMIT SAID SECONDARY PULSE SERIES TO A RECEIVING POINT, SYNCHRONOUS SELECTIVE SWITCHING MEANS FOR SEPARATING THE RECEIVED PULSES INTO GROUPS REPRESENTING SAID FINELY AND COARSELY QUANTIZED SIGNALS, AND MEANS INCLUDING DIGITALANALOG DECODING MEANS TO DEMODULATE THE SEPARATED PULSE GROUPS AND TO PRODUCE OUTPUT SIGNALS REPRESENTATIVE OF SAID LOW AND RAPID VARIATIONS, RESPECTIVELY, OF THE MAGNITUDE BEING TRANSMITTED.