초록 ▼

A pair of movable pistons are separated within an enclosed, submerged cylinder by an expansible combustion chamber. Piston rods extend from these pistons through the opposite ends of the cylinder. A pair of dish-shaped, circular plates are carried on the respective extremities of these two rods so t

A pair of movable pistons are separated within an enclosed, submerged cylinder by an expansible combustion chamber. Piston rods extend from these pistons through the opposite ends of the cylinder. A pair of dish-shaped, circular plates are carried on the respective extremities of these two rods so that their convex surfaces face inwardly toward the ends of the cylinder in spaced relation. Expansion of an explosive gas mixture within the combustion chamber drives the pistons apart so as to accelerate the plates through the water, producing cavitation bubbles at their convex surfaces. Collapse of these bubbles combines efficiently to produce a single energetic acoustic pulse adapted for seismic prospecting.

대표청구항 ▼

In a marine gas exploder utilizing an enclosed cylinder adapted to be supported in a submerged state, a piston movable therein, a piston rod extending from said piston through one end of said cylinder, and air spring means between said piston and said one end for biasing said piston away from said o

In a marine gas exploder utilizing an enclosed cylinder adapted to be supported in a submerged state, a piston movable therein, a piston rod extending from said piston through one end of said cylinder, and air spring means between said piston and said one end for biasing said piston away from said one end, the combination comprising: a. an annular plate mounted at the external end of said rod substantially surrounded by water, one surface of said plate being in facing relation to said one end, and unopposed by any other adjacent or contiguous surface of similar contour and extent; and b. means for explosively driving said piston in the direction of said one end to propel said annulaR plate through the water, the diameter of said plate being selected between limits such that the forward acceleration thereof is sufficient to induce substantial cavitation adjacent its trailing surface and the damped return thereof responsive to said air spring means is insufficient to produce substantial oscillation.