High pressure transducer calibration and test equipment

Claim 1

APPARATUS FOR CREATING DEEP-SUBMERGENCE CONDITIONS FOR TESTING AN OPERATING TRANSDUCER OF THE TYPE HAVING A HEAD PIECE AND A DRIVING MEANS FOR RECIPROCATING THE RADIATING FACE OF SAID HEAD PIECE AND HAVING A HOUSING ENCLOSING THE PARTS OF THE TRANSDUCER WITH ONLY SAID RADIATING FACE EXPOSED, THE TESTING APPARATUS COMPRISING: A LOAD TRANSDUCER CAPABLE OF GENERATING AN OUTPUT SIGNAL WHICH IS A FUNCTION OF OSCILLATORY MECHANICAL POWER APPLIED TO THE FACE OF SAID LOAD TRANSDUCER, THE FACE OF SAID LOAD TRANSDUCER BEING ADAPTED FOR STIFF COUPLING TO THE FACE OF SAID OPERATING TRANSDUCER, A PRESSURE CONTAINER ADAPTED TO RECEIVE SAID LOAD TRANSDUCER ATTACHED FACE-TO-FACE WITH SAID OPERATING TRANSDUCER, AN AIR PUMP CONNECTED TO SAID CONTAINER FOR ELEVATING THE AIR PRESSURE IN SAID CONTAINER TO STATICALLY LOAD THE FACE OF SAID OPERATING TRANSDUCER, AND HIGH PRESSURE LEAD-IN SEALS IN THE WALLS OF SAID CONTAINER FOR LEADS TO THE TERMINALS, RESPECTIVELY, OF THE TWO MENTIONED TRANSDUCERS.