Devices for sensing and indicating variations in frequency and amplitude of acoustically vibrated work members

Claim 1

A VIBRATOR ASSEMBLY INCLUDING IN COMBINATION; A WORK PERFORMING VIBRATOR UNIT WHICH PRESENTS A TRANSDUCER COMPONENT AND A WORK TOOL COMPONENT DESIGNED TO PERFORM USEFUL WORK WHICH IS RIGIDLY JOINED TO SAID TRANSDUCER COMPONENT BY A VIBRATION TRANSMITTING COMPONENT AND WHICH TOGETHER PROVIDE A VIBRATOR UNIT DESIGNED TO VIBRATE AT A PREDETERMINED RESONANCE FREQUENCY WHEN THE TRANSDUCER COMPONENT IS ENERGIZED BY A SURROUNDING ALTERNATING MAGNETIC FIELD OF CORRESPONDING FREQUENCY; A STATIONARY CASING CONTAINING SAID TRANSDUCER COMPONENT AND A PORTION OF THE VIBRATION TRANSMITTING COMPONENT OF SAID VIBRATOR UNIT, MEANS ASSOCIATED WITH SAID CASTING FOR SUPPORTING SAID VIBRATOR UNIT AT A NODE OF LONGITUDINAL VIBRATION THEREOF, AND A HIGH FREQUENCY ALTERNATING CURRENT WINDING CONTAINED WITHIN AND SUPPORTED BY SAID CASING AND POSITIONED IN SURROUNDING RELATION TO SAID TRANSDUCER COMPONENT AND OPERATIVE WHEN ENERGIZED TO ESTABLISH AN ALTERNATING MAGNETIC FIELD IN SURROUNDING RELATION TO SAID TRANSDUCER COMPONENT WHOSE FREQUENCY SUBSTANTIALLY CORRESSPONDS TO THE RESONANCE FREQUENCY OF VIBRATION OF SAID WORK PERFORMING VIBRATOR UNIT; AND A DEVICE FOR SENSING VARIATIONS IN THE FREQUENCY AND AMPLITUDE OF VIBRATION OF SAID WORK PERFORMING VIBRATOR UNIT WHEN VIBRATED, SAID DEVICE INCLUDING, AN ELONGATED MAGNETOSTRICTIVE ELEMENT FIXED TO SAID VIBRATION TRANSMITTING COMPONENT AND EXTENDING SUBSTANTIALLY PARALLEL THERETO AND WHEREBY SAID ELEMENT IS VIBRATED AT A FREQUENCY AND AMPLITUDE OF VIBRATION OF THAT REGION OF THE VIBRATION TRANSMITTING COMPONENT AT WHICH SAID ELEMENT IS FIXED, A PICK-UP ASSEMBLY ADJACENT SAID MAGNETOSTRICTIVE ELEMENT WHICH INCLUDES A PICK-UP COIL, AND MEANS FOR POLARIZING SAID MAGNETOSTRICTIVE ELEMENT, AND MEANS FORMING A TUBULAR EXTENSION OF SAID CASING FOR CONTAINING AND SUPPORTING SAID PICK-UP COIL IN TELESCOPED POSITION WITH RESPECT TO SAID VIBRATION TRANSMITTING COMPOIN SPACED RELATION TO SAID VIBRATION TRANSMITTING COMPONENT; SAID PICK-UP COIL BEING OPERATIVE TO GENERATE AN ELECTROMOTIVE FORCE AS INDUCED THEREIN BY THE VIBRATIONS OF SAID POLARIZED MAGNETOSTRICTIVE ELEMENT, WHOSE MAGNITUDE VARIES IN ACCORDANCE WITH THE VARIATIONS IN AMPLITUDE OF VIBRATION OF THE VIBRATOR UNIT AT THE REGION THEREOF AT WHICH SAID MAGNETOSTRICTIVE ELEMENT IS SECURED THERETO.