Signal transmission systems using sonic lines

Claim 1

A SIGNAL TRANSMISSION SYSTEM FOR OBTAINING A TIME DELAY OF AN INPUT INFORMATION SIGNAL COMPRISING A TRANSPARENT SONIC LINE, A TRANSDUCER COUPLED TO ONE END OF SAID SONIC LINE, AN INPUT ELECTRICAL SIGNAL SOURCE, AN ELECTRICAL CARRIER SOURCE, MEANS TO MODULATE THE ELECTRICAL CARRIER FROM SAID LAST-NAMED SOURCE WITH THE INPUT ELECTRICAL SIGNAL FROM SAID FIRST-NAMED SOURCE TO PROVIDE A MODULATED ELECTRICAL CARRIER, MEANS TO APPLY SAID MODULATED CARRIER TO SAID TRANSDUCER TO GENERATE WAVE ENERGY MODULATED WITH SAID INPUT INFORMATION SIGNAL TRAVELLING FROM SAID TRANSDUCER DOWN THE LINE, A LIGHT SOURCE, MEANS TO DIRECT LIGHT RAYS FROM SAID LIGHT SOURCE THROUGH SAID SONIC LINE FROM ONE SIDE THEREOF SUBSTANTIALLY TRANSVERSE THERETO AT A LOCATION SPACED FROM SAID TRANSDUCER, PHOTOELECTRIC DETECTOR MEANS LOCATED ON THE OTHER SIDE OF SAID LINE TO RECEIVE INTENSITY-MODULATED LIGHT RAYS FROM SAID LIGHT SOURCE PASSING THROUGH THE LINE AND TO GENERATE AN ELECTRICAL MODULATED CARRIER CORRESPONDING TO THE INTENSITY MODULATIONS OF SAID LIGHT RAYS AND WHEREIN THE MODULATIONS OF THE CARRIER REPRESENT THE INPUT INFORMATION SIGNAL DELAYED BY TRAVELLING THROUGH THE SONIC LINE, AND MEANS TO DEMODULATE SAID GENERATED ELECTRICAL CARRIER.