Process and device for detecting the intensity of ultrasonic energy

Claim 1

THE PROCESS FOR MEASURING THE INTENSITY OF ULTRASONIC ACTIVITY AND OF THE RESULTING CAVITATION PRODUCED IN A BATH SUBJECTED TO ULTRASONIC RADIATION, WHICH COMPRISES PLACING IN SAID BATH A CELL COMPRISING A SOUND TRANSMITTING ENVELOPE CONTAINING THEREIN AN ELECTROLYTE COMPRISING A DILUTE AQEUOUS SOLUTION OF A SUBSTANTIALLY NEUTRAL MATERIAL SELECTED FROM THE GROUP CONSISTING OF SULFATES AND SULFONATES, AND WHICH PRODUCES POLARIZATION OF SAID CELL, A PAIR OF SPACED ELECTRODES COMPOSED OF TWO DIFFERENT METALS SUFFICIENTLY SPACED APART IN THE ELECTROMOTIVE SERIES OF ELEMENTS TO GIVE A SUBSTANTIAL CURRENT WHEN ELECTRICALLY CONNECTED IN AN EXTERNAL CIRCUIT, ONE OF SAID ELECTRODES BEING MAGNESIUM, SAID ELECTRODES BEING IMMERSED IN SAID ELECTROLYTE TO A DEPTH NOT LESS THAN ONE HALF WAVE LENGTH OF THE ULTRASONIC RADIATION, AND A CURRENT INDICATOR IN SHORT CIRCUIT WITH SAID ELECTRODES, WITH RELATIVELY LOW CURRENT GENERATED IN SAID CELL AND PASSING THROUGH SAID CIRCUIT, AND EXPOSING SAID BATH AND ELECTROLYTE TO ULTRASONIC RADIATION, TO CAUSE A DEPOLARIZING ELECTRODE REACTION TO OCCUR IN SAID CELL AND TO PRODUCE A CONSEQUENT SUBSTANTIAL INCREASE IN CURRENT IN SAID CIRCUIT, FOR A PERIOD SUFFICIENT TO OBTAIN A MAXIMUM CURRENT VALUE AS SHOWN BY SAID CURRENT INDICATOR.