Piezoelectric time-of-arrival gage

Claim 1

A TIME-OF-ARRIVAL GAGE COMPRISING; A BODY OF HEAT CONDUCTING MATERIAL HAVING A BORE THEREIN WITH AN EXTERNAL OPENING AT ONE END THEREOF, A PAIR OF ELECTRODES, ONE OF SAID ELECTRODES, BEING CONNECTED TO AN OUTPUT TERMINAL, A PIEZOELECTRIC CRYSTAL DISPOSED BETWEEN SAID PAIR OF ELECSAID ELECTRODES AND SAID PIEZOELECTRIC CYSTAL BEING ELECTRICALLY INSULATED FROM SAID BODY, A SOLID HEAT BARRIER MEANS DISPOSED BETWEEN THE OTHER OF SAID ELECTORDES AND SAID OPENING IN SAID BORE PROVIDING BOTH A THERMAL INSULATION TO SAID CRYSTAL AND AN ACOUSTIC DAMPING OF NOISE VIBRATIONS FOR INCREASING THE SIGNAL-TO-NOSIE RATIO, AND A DIAPHRAGM OF HEAT CONDUCTING MATERIAL DISPOSED BETWEEN SAID OPENING AND SAID HEAT BARRIER MEANS FOR TRANSMITTING THERETHROUGH A SHOCK WAVE ENTERING SAID BORE AND CONDUCTIVELY RELATED TO SAID BODY FOR DISSIPATING A PORTION OF THE HEAT ENERGY OF THE SHOCK WAVE, SECURING MEANS FOR HOLDING SAID ELECTRODES, SAID PIEZOELECTIC CRYSTAL, SAID HEAT BARRIER, AND SAID DIAPHRAGM IN TIGHT PHYSICAL CONTACT BETWEEN ADJACENT ELEMENTS WITHIN SAID BORE, WHEREBY THE SHOCK WAVE ENTERING SAID BORE CAUSES AN ELECTRICAL SGINAL VOLTAGE TO BE PRODUCED AT SAID OUTPUT TERMINAL.