Abstract: 1. A system for detecting the presence and position of submerged objects below the ocean surface, comprising in combination, means for projecting a beam of electro-magnetic rays falling within the 0.4800 to 0.5800 micron wave band in the direction of an object to be detected, a receiver for receiving rays reflected from an object in the path of said projected beam, said receiver comprising a spherically shaped body having an aperture formed in the area which is in contact with the ocean water to permit said reflected rays to enter and impinge on the inner surface of said spherically shaped body, inlet and outlet means for circulating dry cooled constant temperature nitrogen in said spherically shaped body under sufficient pressure to prevent ocean water from entering said spherically shaped body, and a plurality of lead sulfide cells mounted on the inner surface of said sphere for generating an output signal proportional to the intensity and angle of entry of the reflected rays.

Abstract: The inlet opening of a chamber is connected to the exhaust manifold of an internal combustion engine so that the combustion products pass through the chamber to an exit opening. The chamber contains a pair of baskets which are open at their upstream ends and closed at their downstream ends. The sides of the baskets are made up of thin copper wire strands placed side by side. The exhaust from the engine is brought into the first basket and the pulses of pressure from the engine exhaust bows the wires outward in a pulsating manner to alternately open and close the spaces between the wires allowing the gases to pass through the spaces. Atmospheric air is introduced into the first basket to mix with the combustion products. The gases emanating from the first basket are introduced into the open end of the second basket and pass through the walls of the second basket in the same manner as the first basket, and then on to the exhaust opening.