Impact-energized sound source

Claim 1

A PRESSURE PULSE TRANSMITTER HAVING, IN COMBINATION, A TUBULAR HORN MEMBER , ONE END OF SAID MEMBER EXTENDING WITHIN A SOUND PROPAGATING MEDIUM, A PLATE MEMBER HAVING AN ANNULAR GUIDE RIM SLIDABLY FITTED IN SAID TUBULAR MEMBER, A FLEXIBLE SEAL MEANS ATTACHED TO SAID ONE END AND EXTENDING INTO SAID TUBULAR MEMBER AND AGAINST SAID PLATE MEMBER TO PREVENT SAID MEDIUM FROM PASSING THROUGH THE SLIDING FIT BETWEEN SAID PLATE MEMBER AND SAID TUBULAR MEMBER, A GUIDE TUBE CONNECTED WITH THE OTHER END OF SAID TUBULAR MEMBER, SAID GUIDE TUBE AND TUBULAR MEMBER BEING DIMENSIONED TO PROVIDE A ABUTMENT MEANS FOR SAID PLATE MEMBERS IN ITS STRIKE POSITION, A PISTON-LIKE STRIKER MEMBER SLIDABLY MOUNTED IN SAID GUIDE TUBE AND ADAPTED FOR IMPACT WITH SAID PLATE MEMBER WHEN THE PLATE MEMBER IS IN ITS STRIKE POSITION, AND FLUID ACTUATING MEANS OPERATIVELY ASSOCIATED WITH SAID GUIDE TUBE AND STRIKER MEMBER TO PROPEL SAID STRIKER MEMBER ALONG SAID GUIDE AND AGAINST SAID PLATE MEMBER, THEREBY TO CAUSE SAID PLATE MEMBER TO MOVE TOWARD SAID ONE END AND TO RADIATE A PRESSURE PULSE TO SAID MEDIUM.