Abstract: A transducer assembly comprising: a diaphragm; at least one transducer elnt bonded by its head to the diaphragm; a pressure-resistant means, for supporting the transducer assembly; an acoustic isolator mounted about the transducer element and located between the diaphragm and the pressure-resistant means; the material of the acoustic isolator being elastically linear and equal in thickness to one-quarter wavelength of the corresponding operating frequency of the transducer element.

Abstract: A ballistic missile about to re-enter the atmosphere is destroyed by explosively dispersing for large quantities of inherently-light C.sub.60 molecules in clouds in the path of the missile. The sharp edges of the molecules scar the missile and subject it to destruction from the heat or re-entry.

Abstract: A cased telescoped ammunition round includes a propellant charge disposed in a tubular case and having an axial bore containing a center sleeve attached at its opposite ends to the opposite ends of the case. A projectile is housed within a forward portion of the center sleeve and a primer within an aft portion thereof. The primer is actuatable for igniting the propellant charge to cause firing of the projectile. Features are provided to ensure dimensional recovery of the tubular case after firing of the projectile. One feature relates to the center tube being composed of a material which provides sufficient elasticity to stretch and contract uniformly from and to dimensions allowing ejection of the tubular case from the gun chamber. Another feature relates to longitudinal structural members provided to extend between and fasten to opposite ends of the case, and spaced circumferentially about and between the center sleeve and the case.

Abstract: A compact subwavelength size monopole underwater sound radiator has chararistics to maximize resistive radiation impedance, minimize reactive radiation impedance, facilitate heat dissipation and minimize compensating air usage. This results in improved efficiency, bandwidth and use factor. The underwater sound radiator uses two back-to-back mounted, frustum shaped, hollow, radiating shells to achieve radiation characteristics approximating those of an equivalent sized pulsating sphere. An elliptically shaped, uniform cross-section magnetostrictive ring crossed by a linear piezoelectric spreader comprises a compact eclectic driver. Both the magnetostrictive ring and the piezoelectric stack contribute to the output through inverse phase cyclic changes in their respective lengths those changes being added and amplified by the flexural-bow type action of the elliptically shaped magnetostrictive ring.

Abstract: A fiber optic hydrophone for use as an underwater electroacoustic standard. The hydrophone includes a fiber optic acoustic wave detector in one end of the hydrophone which is subjected to incident acoustical waves. A similar fiber optic is in an acoustically isolated compartment where the optic fiber is not affected by the incident acoustical wave. Comparison of light passing through each coil will determine incidence of an acoustical wave on the detector fiber.

Abstract: Apparatus for nebulizing particulate laden undiluted oil samples of varying iscosities suitable for subsequent analysis utilizing atomic spectroscopic principles. Undiluted samples of varying viscosity are heated as they are fed through an inlet tube where the heated oil is fed into a channel groove and brought into contact with a nebulizing gas introduced through an orifice intersecting the channeled groove in which the oil flows.