Communications – electrical: acoustic wave systems and devices – Sonar counter-measures
Patent
1996-04-01
1998-02-24
Pihulic, Daniel T.
Communications, electrical: acoustic wave systems and devices
Sonar counter-measures
H04K 300
Patent
active
057217114
ABSTRACT:
An apparatus and method for producing inverse bubbles is disclosed. One embodiment of such apparatus includes a first solution in a container and a second solution in a reservoir above the container. The reservoir has a dispensing aperture and while dispensing drops of the second solution into the container, the aperture and the surface of the first solution are maintained at a substantially constant distance from one another. Another embodiment of the apparatus involves a gun-like device dispensing drops using projectile force. The method involves producing inverse bubbles using an aqueous first solution and an aqueous second solution. Each solution includes a substance for reducing water surface tension. A drop of the second solution is dispensed into the first solution at a velocity such that the drop impacts the surface with a force slightly in excess of the force component of the surface tension of substantially pure water. A liquid containing an inverse bubble is thereby produced.
REFERENCES:
patent: 5222455 (1993-06-01), Furey
patent: 5283766 (1994-02-01), Klein
Stong The Amateur Scientist "Curious Bubbles in Which a Gas Enclosure a Liquid Instead of the Other Way Around" from Scientific American, Apr., 1974 Issue, pp. 116-121.
Fine Matthew J.
LeMay Ronald C.
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