Self-contained intra oral strain gauge

Claim 1

AN INTRA ORAL STRAIN GAUGE COMPRISING; A TOOTHSHAPED HOLLOW ELEMENT SAID TOOTH-SHAPED ELEMENT BEING FILLED WITH A COMPRESSIBLE POTTING MATERIAL, A FIRST CAVITY IN SAID POTTING MATERIAL CENTRALLY LOCATED WITHIN SAID TOOTHSHAPED ELEMENT; AT LEAST ONE ADDITIONAL CAVITY IN SAID POTTING MATERIAL ADJACENT SAID FIRST CAVITY; A TRANSMITTER HAVING A HIGH FREQUENCY OSCILLATOR CIRCUIT THEREIN; A PRESSURE SENSITIVE CAPACITOR IN OSCILLATOR CIRCUIT; SAID PRESSURE SENSITIVE CAPACITIVE ELEMENT INCLUDING TWO SPACED ELECTRODES, A DIELECTRIC SPACER SECURED TO ONE OF SAID ELECTRODES, AND A RESILIENT RUBBER RING LOCATED BETWEEN SAID ELECTRODES TO PROVIDE A VARIABLE SPACE THEREBETWEEN, SAID PRESSURE SENSITIVE CAPACITOR BEING LOCATED IN SAID FIRST CAVITY; THE OTHER CIRCUIT ELEMENTS OF SAID OSCILLATOR CIRCUIT BEING LOCATED IN SAID ADDITIONAL CAVITY; ANTENNA MEANS, CONNECTED TO THE OUTPUT OF SAID OSCILLATOR CIRCUIT; AND MEANS, RESPONSIVE TO PRESSURE ON SAID TOOTH, FOR TRANSMITTING SAID PRESSURE TO SAID COMPRESSIBLE POTTING MATERIAL AND TO SAID PRESSURE SENSITIVE CAPACITOR.