Asynchronous pulse multiplexing

Claim 1

IN A SYSTEM FOR ASYNCHRONOUSLY MULTIPLEXING INFORMATION BEARING PULSE TRAINS, TWO PULSE TRANSMITTERS EACH OF WHICH GENERATES AN INTELLIGENCE BEARING PULSE TRAIN WHICH IS INDEPENDENT OF THE PULSE TRAIN GENERATED BY THE OTHER TRANSMITTER IN BOTH PHASE AND FREQUENCY RELATIONSHIP BUT WITH THE AMPLITUDE OF THE PULSES GENERATED BY A FIRST OF SAID PULSE TRANSMITTERS BEING TWICE THE AMPLITUDE OF THE PULSES GENERATED BY THE SECOND OF SAID PULSE TRANSMITTERS AND HAVING ONE-HALF THE PULSE WIDTH OF THE PULSES GENERATED BY THE SECOND OF SAID PULSE TRANSMITTERS, MEANS TO ADD THE PULSE TRAINS GENERATED BY SAID PULSE TRANSMITTERS SO THAT AN OVERLAPPING SUM OF SAID PULSE TRAINS IS PRODUCED, MEANS TO TRANSMIT SAID OVERLAPPING SUM SIGNAL OVER A TRANSMISSION MEDIUM, A RECEIVER TO RECEIVE THE TRANSMITTED SIGNAL, MEANS AT SAID RECEIVER RESPONSIVE TO THE RECEIVED SIGNAL TO SEPARATE THE PULSE TRAINS EMANATING FROM SAID PULSE TRANSMITTERS COMPRISING A FIRST REGENERATOR TO WHICH THE RECEIVED SIGNAL IS APPLIED WHICH GENERATES A PULSE AT A FIRST OUTPUT TERMINAL WHEN THE RECEIVED SIGNAL IS GREATER IN AMPLITUDE THAN ONE AND ONE-HALF TIMES THE AMPLITUDE OF THE PULSES RECEIVED FROM THE SECOND PULSE TRANSMITTER, A FITLTER HAVING AN INPUT TERMINAL, AN OUTPUT TERMINAL AND A TRANSMISSION CHARACTERISTIC IDENTICAL TO THAT OF THE TRANSMISSION MEDIUM, SAID INPUT TERMINAL OF SAID FILTER BEING CONNECTED TO SAID FIRST OUTPUT TERMINAL, AN ANALOG SUBTRACTOR HAVING TWO INPUT TERMINALS AND AN OUTPUT TERMINAL THE OUTPUT TERMINAL OF SAID FILTER BEING CONNECTED TO ONE OF SAID INPUT TERMINALS OF SAID ANALOG SUBTRACTOR THE SECOND INPUT TERMINAL OF SAID SUBSTRACTOR BEING CONNECTED TO RECEIVE THE TRANSMITTED SIGNAL SO THAT THE SIGNAL AT THE OUTPUT TERMINAL OF SAID SUBTRACTOR COMPRISES SUBSTANTIALLY THE PULSES FROM SAID SECOND PULSE TRANSMITTER, AND A REGENERATOR HAVING AN INPUT TERMINAL AND AN OUTPUT TERMINAL THE INPUT TERMINAL BEING CONNECTED TO THE OUTPUT TERMINAL OF SAID SUBTRACTOR TO GENERATE AN OUTPUT PULSE AT ITS OUTPUT TERMINAL WHENEVER A PULSE IS RECEIVED WHICH IS GREATER IN AMPLITUDE THAN ONE-HALF THE AMPLITUDE OF A PULSE RECEIVED FROM SAID SECOND TRANMITTER.