Underwater loudspeaker

Claim 1

MEANS FOR BROADCASTING AND RECEIVING PRESSURE ENERGY WHILE BEING SUBMERGED WITHIN WATER COMPRISING IN COMBINATION, A PAIR OF HOLLOW HEMISPHERICAL SHELLS EACH OF WHICH IS SPATIALLY DISPOSED FROM THE OTHER ALONG AN AXIS OF GEOMETRICAL REVOLUTION, A RESILIENT MEANS CONNECTED TO EACH OF SAID SHELLS IN SUCH MANNER AS TO ALLOW RELATIVE MOVEMENT THEREBETWEEN ALONG SAID AXIS OF GEOMETRICAL REVOLUTION, A PLURALITY OF POLORIZED PIEZOELECTRIC DISCS HAVING SILVER ELECTRODES ATTACHED TO THE FACES THEREOF, SAID DISCS BEING STACKED ALONG SAID AXIS OF GEOMETRICAL REVOLUTION FOR CONTACT OF THE ADJACENT SILVER ELECTRODES ATTACHED THERETO, CONDUCTOR MEANS COUPLED TO SAID SILVER ELECTRODES FOR EFFECTIVELY CONNECTING SAID PIEZOELECTRIC DISCS IN ELECTRICAL PARALLEL, MEANS ENCAPSULATING SAID PIEZOELECTRIC DISCS, SILVER ELECTRODES, AND CONDUCTORS FOR SUPPORTING SAME AS AN INSULATED UNITARY ELONGATABLE COLUMN, MEANS CONNECTED BETWEEN THE ENDS OF SAID COLUMN AND THE AFORESAID HEMISPHERICAL SHELLS RESPECTIVELY FOR MOUNTING SAME THEREIN, A TOROIDAL TRANSFORMER SURROUNDING SAID COLUMN, SPONGE RUBBER MEANS INTERCONNECTING SAID COLUMN AND SAID TRANSFORMER FOR RESILIENTLY SUPPORTING SAME, MEANS INTERCONNECTING SAID TRANSFORMER