Convergent field supported inertial reference

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11. AN INERTIAL REFERENCE SYSTEM WHICH COMPRISES:

(A) A PIEZOELECTRIC BODY HAVING A HOLLOW CAVITY THEREIN, (B) A SPHERICAL REFERENCE ELEMENT IN SAID CAVITY, (C) A TRANSMISSION FLUID FILLING THE SPACE IN SAID CAVITY OUTSIDE SAID ELEMENT HAVING SPECIFIC GRAVITY SUBSTANTIALLY CORRESPONDING WITH THE SPECIFIC GRAVITY OF SAID ELEMENT, (D) MEANS FOR APPLYING ALTERNATING VOLTAGE TO SAID BODY FOR GENERATION OF ULTRASONIC WAVES IN SAID CAVITY WHICH ARE CONVERGENT TOWARD THE CENTER OF SAID CAVITY TO POSITION SAID ELEMENT, (E) MEANS FOR SENSING ROTATION OF SAID BODY RELATIVE TO SAID ELEMENT ABOUT SELECTED AXES, (F) GIMBAL MEANS SUPPORTED SAID BODY FOR INDEPENDENT ROTATION ABOUT SAID AXES, AND (G) MEANS FOR SLAVING SAID BODY TO SAID ELEMENT WITH REFERENCE TO ROTATION ABOUT SAID AXES.

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11. AN INERTIAL REFERENCE SYSTEM WHICH COMPRISES:
- (A) A PIEZOELECTRIC BODY HAVING A HOLLOW CAVITY THEREIN, (B) A SPHERICAL REFERENCE ELEMENT IN SAID CAVITY, (C) A TRANSMISSION FLUID FILLING THE SPACE IN SAID CAVITY OUTSIDE SAID ELEMENT HAVING SPECIFIC GRAVITY SUBSTANTIALLY CORRESPONDING WITH THE SPECIFIC GRAVITY OF SAID ELEMENT, (D) MEANS FOR APPLYING ALTERNATING VOLTAGE TO SAID BODY FOR GENERATION OF ULTRASONIC WAVES IN SAID CAVITY WHICH ARE CONVERGENT TOWARD THE CENTER OF SAID CAVITY TO POSITION SAID ELEMENT, (E) MEANS FOR SENSING ROTATION OF SAID BODY RELATIVE TO SAID ELEMENT ABOUT SELECTED AXES, (F) GIMBAL MEANS SUPPORTED SAID BODY FOR INDEPENDENT ROTATION ABOUT SAID AXES, AND (G) MEANS FOR SLAVING SAID BODY TO SAID ELEMENT WITH REFERENCE TO ROTATION ABOUT SAID AXES.

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