Wire delay line comprising two transducers, one relatively moveable with respect to the other

Claim 1

DELAY LINE APPARTUS WHEREIN A TIME DELAY IS ESTABLISHED BETWEEN FIRST AND SECOND ELECTRICL SIGNALS AND INCLUDING IN COMBINATION, A HOLLOW CYLINDER HAVING A SPIRAL GROOVE ON THE INSIDE SURFACE THEREOF, SAID GROOVE BEING SUBSTANTIALLY RECTANGULAR IN CROSS SECTION, A WIRE LOCATED WITHIN AND ADJACENT TO THE BOTTOM OF SAID GROOVE AND FORMING A HELIX, MAGNETOSTRICTIVE TRANSDUCER MEANS ADAPTED TO BE MOVED ALONG SAID INSIDE SURFACE, SAID TRANSDUCER MEANS INCLUDING A COIL ABOUT SAID WIRE, AND MEANS FOR REMOVING A PORTION OF SAID WIRE FROM WITHIN SAID GROOVE, SAID MAGNETOSTRICTIVE TRANSDUCER MEANS BEING RESPONSIVE TO THE FIRST ELECTRICAL SIGNAL TO DEVELOP A STRESS WAVE IN SAID REMOVED PORTION OF SAID WIRE BY MEANS OF THE MAGENTOSTRICTIVE EFFECT, PIEZOELECTRIC TRANSDUCER MEANS MECHANICALLY COUPLED TO SAID WIRE AND RESPONSIVE TO THE STRESS WAVE THEREIN TO DEVELOP THE SECOND ELECTRICAL SIGNAL BY MEANS OF THE PIEZOELECTRIC EFFECT WHEREBY ENERGY IS TRANSFERRED WITH A TIME DELAY FROM SAID MAGNETOSTRICTIVE TRANSDUCER MEANS TO SAID PIEZOELECTRIC TRANSDUCER MEANS ONLY THROUGH SAID WIRE.