Acoustics – Geophysical or subsurface exploration – Seismic wave generation
Patent
1974-12-26
1976-04-27
Moskowitz, Nelson
Acoustics
Geophysical or subsurface exploration
Seismic wave generation
181120, 181114, 340 17R, G01V 138, G01K 1100
Patent
active
039528332
ABSTRACT:
A gas exploder consisting of a rigid cylindrical lower member and a rigid upper member telescoping therein to form a chamber in which a gas explosion can take place is supported beneath the surface of the water from a float by means of low resilience ropes connected to the bottom of the lower member so as to substantially limit its allowable downward movement. The upper member includes a piston downwardly biased within the lower member by an air spring and a hollow pedestal connected to the piston and extending freely through the float above the surface of the water to accommodate fuel, compressed air and exhaust conduits communicating with the interior of the housing. The energy of an explosion in the combustion chamber is expended primarily through rapid upward movement of the piston, which compresses the air spring and then lifts the lower member. Implosion of the resultant cavitation bubble adjacent the bottom surface of the lower member generates a pressure pulse of large peak amplitude.
REFERENCES:
patent: 3430727 (1969-03-01), Strange et al.
patent: 3478838 (1969-11-01), Kilmer
patent: 3818440 (1974-06-01), Pransfield
Franklin Alpheus A.
Reed Dale H.
Atlantic Richfield Company
Betz Robert M.
Moskowitz Nelson
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