Abstract: A variable temperature method for the preparation of single and multiple taxial layers of single-phase (e.g., face-centered cubic), ternary lead chalcogenide alloys (e.g., lead cadmium sulfide [Pb.sub.1-w Cd.sub.w ].sub.a [S].sub.1-a wherein w varies between zero and fifteen hundredths, inclusive, and a=0.500.+-.0.003), deposited upon substrates of barium fluoride, BaF.sub.2, maintained in near thermodynamic equilibrium with concurrently sublimated lead alloy and chalcogenide sources. During preparation, the temperature of the substrate is varied, thereby providing an epilayer with graded composition and predetermined electrical and optical properties along the direction of growth. This growth technique can be used to produce infrared lenses, narrowband detectors, and double heterojunction lasers.

Abstract: A controlled environment process for making diode arrays by depositing the sublimate of a semiconductor material through an aperture of a mask placed nearby a substrate and then subjecting part of the sublimate to ion implantation. The aperture causes diffraction of the sublimate vapor stream, while the proximity of the edges of the aperature to the substrate causes the central plateau of the deposited thin-film to have a rounded rim leading to sides that taper smoothly in thickness to the substrate. Ion implantation to a controlled depth creates an isolated planar junction. Surface layers of a gold electrode running onto the substrate from different surface areas of the thin-film provide for off-mesa bonding of electrical leads.

Abstract: A ball bearing assembly device for permitting dry assembly of bearings wiut additional equipment. The assembly device is provided with an inner body surrounded by an outer body so as to create a circumferential gap therebetween. The gap is provided with a vacuum connection which allows positioning of ball bearings on a ball bearing shaft or inner bearing ring when the shaft or ring is mounted on the inner body. The bearing shaft is placed into the inner body so as to provide a mounting to aid in insertion of the bearing shaft or ring into the outer bearing ring. The bearing shaft may be mounted on a reciprocating shaft for insertion into the outer bearing ring.

Abstract: An improved method of coating crystalline high explosives with polyethylene ax comprising:(a) forming a loose slurry of finely divided crystalline explosive particles in water;(b) adding an emulsion of(1) an emulsifiable polyethylene wax,(2) potassium stearate,(3) KOH, and(4) water to the slurry;(c) heating the slurry-emulsion mixture to a temperature in the range of from about 92.degree. C. to about 98.degree. C. with stirring;(d) adding enough acetic acid to the slurry-emulsion mixture to lower the pH to about 6 with stirring;(e) cooling the resulting solution; and(f) isolating the product polyethylene wax coated high explosive particles.

Abstract: A connector for joining a fiber optic cable. The connector is constructed th a thin wall tube enclosing strips of a shape memory alloy material. The strips are bent and inserted into the thin wall tube such that an axial cavity is formed between the opposing strips. The axial cavity provides a self-centering mechanism for positioning fiber optic cables along the central axis of the tube. Dimensions of the tube and shape memory alloy strips are chosen such that fiber optic cables inserted into each end of the connector when it is above the transition temperature range of the strips will be forced into coaxial alignment when the connector is cooled to a temperature below the transition range of the strips.

Abstract: A method and apparatus for measuring the dynamic material constants of rur compounds. The rubber compound is tested in strip form by attaching one end of the strip to an electromechanical shaker while the opposite end of the strip is suspended under constant tension. The electromechanical shaker propagates an acoustic wave in the test strip and a piezoelectric transducer positioned at a first point on the test strip measures the mechanical response of the strip for phase and amplitude. The shaker is programmed to step piecewise over the frequency range from 100 Hz to 40 KHz by a frequency synthesizer. The distance between the shaker and the transducer is changed and data is obtained for a second point on the strip. The test values obtained are used to calculate Young's Modulus and the loss factor for the rubber compound.

Abstract: A pyrotechnic composition, suitable for metal cutting, comprises an oxidi selected from the class consisting of calcium sulfate hemihydrate, anhydrous calcium sulfate, magnesium monohydrate, anhydrous magnesium sulfate, anhydrous strontium sulfate, and mixtures thereof; a metal fuel, a halopolymeric binder; and sulfur.

Abstract: A high temperature method for the preparation of single and multiple epitaxial layers of single-phase lead sulfide-selenide, [Pb].sub.a [S.sub.x Se.sub.1-x ].sub.1-a wherein x varies between one and zero, inclusive, and a=0.500.+-.0.003, deposited upon substrates of barium fluoride, BaF.sub.2, maintained in near thermodynamic equilibrium with concurrently sublimated lead alloy and chalcogenide sources. During preparation, the substrate is exposed to the vapor emanating from the single chimney of a two-zone, dual-chamber furnace, thereby providing an epilayer of uniform, and predetermined electrical and optical properties.

Abstract: An oscillator generates a fixed frequency ultrasonic output signal. After wer amplification this signal drives a transmitting transducer which projects an ultrasonic beam into water. Reflected signals are received by a receiving transducer and AGC preamplified. A chopper multiplies the received signal with the transmitted signal and generates an output signal if a target exists. To determine whether the target is a swimmer, this output signal is band pass filtered and amplified and then fed both to an automatic alarm and to a set of headphones. A human operator listening to the headphone output classifies the target and determines exact bearing.

Abstract: An improved method of manufacturing articles containing carbon fibers when the fibers are temporarily plasticized to render them more flexible thereby permitting tortuous mechanical manipulation of the fibers to be carried out with little or no mechanical damage. The improvement comprises exposing the carbon fibers to agents capable of intercalating single crystals of graphite, such as bromine or iodine monochloride which have the effect of plasticizing the fibers by lowering their tensile modulus. While the fiber yarns are appreciably more flexible in the plasticized state, and have a higher elongation-at-break, on removal of the plasticizer they tend to return to their original state but retain a measurable degree of the shape imparted to them.

Abstract: A warhead initiation system in which a helical magnetic fluxtrapper explo a copper mesh initiator at a single point, several points, along a line and/or over a surface.

Abstract: In a satellite navigation system for an ocean vessel, a major source of error is unknown ocean currents when the navigation is done by dead-reckoning with respect to the waters. The present method for determining and correcting for ocean navigation error which is caused by unknown ocean currents provides a highly accurate position of the vessel with respect to the earth. The position error reflects not only the difference between a dead-reckoned position and a satellite fix position which up-dates the dead-reckoned position but also accounts for the motion of the vessel due to the ocean currents during the time between the satellite lock-on and the actual error computation and correction.

Abstract: A two stage parachute recovery system for use in recovering fuzes or other ensitive equipment from a projectile that has been launched from a gun barrel wherein explosive means are successively detonated by a timing mechanism and by centrifugal force imparted to the projectile respectively so as to deploy each of the said parachutes and to thereby recover the fuze before impact.

Abstract: Unsymmetrical carbonates of the formula ##STR1## are prepared by the following reaction sequence ##STR2## where R and R' can each be --CH.sub.2 C(NO.sub.2).sub.3, CH.sub.2 CF(NO..2).sub.2, --CH.sub.2 CF.sub.2 (NO.sub.2), --CH.sub.2 CCl(NO.sub.2).sub.2, --CH.sub.2 CF.sub.3, --CH.sub.2 CCl.sub.3, --CH.sub.2 C(NO.sub.2).sub.2 CH.sub.3, or --CH.sub.2 CF.sub.2 CF.sub.2 H, provided that R.noteq.R' and wherein R" is a lower alkyl group of from 1 to 6 carbon atoms.Also included are symmetrical 1,3-bis(halo- and nitroalkyl carbonyldioxy)-2,2-dinitropropanes of the formula ##STR3## which are synthesis by the following reaction sequence ##STR4## wherein R and R" are as defined above. The carbonates of this invention are useful as energetic additives to propellants and explosive.

Abstract: A solid rocket propellant comprising (1) ammonium perchlorate, (2) alumin (3) poly(1,2-butylene) glycol, (4) the reaction product of propylene oxide and either trimethylolpropane, hexanetriol or mixtures thereof, (5) 2,3-dihydroxypropyl bis(2-cyanoethyl) amine, (6) hexamethylene diisocyanate, (7) copper chromite, (8) a carboxylic acid ester of either a diol and a monocarboxylic acid or a dicarboxylic acid and a monofunctional alcohol, and (9) sulfur and optionally containing (10) a metal acetylacetonate, (11) 2,4-pentanedione and (12) liquid silicon oil.

Abstract: A controlled environment process for making diode arrays by depositing the sublimate of a semiconductor material through an aperture of a mask placed nearby a substrate and then subjecting part of the sublimate to ion implantation. The aperture causes diffraction of the sublimate vapor stream while the proximity of the edges of the aperture to the substrate causes the central plateau of the deposited thin-film to have a rounded rim leading to sides that taper smoothly in thickness to the substrate. Ion implantation to a controlled depth creates an isolated planar junction. Surface layers of a gold electrode running onto the substrate from different surface areas of the thin-film provide for off-mesa bonding of electrical leads.

Abstract: Invention is an aerial vehicle that uses a centrally located aft burning id-propellant motor to supply a fuel-rich exhaust to four cylindrical engines which are mounted in equally spaced relation about the exterior of the vehicle body. The fuel-rich exhaust is mixed with air in the engines and burned to provide ramjet action to propel the vehicle. A tandem booster rocket initially propels the vehicle to supersonic speed. Tail fins are interdigitated with respect to the engines and include sections which are movable upon command for steering the vehicle. Among the advantages for the vehicle are its maneuverability and its adaptability to existing missile systems.

Abstract: A two-stage aerial vehicle which is launched and accelerated by an integral olid booster. After booster burnout and jettison of the booster nozzle, the booster chamber becomes the combustion chamber for a liquid fueled ramjet. The vehicle is designed for use with known guided missile launching systems and employs unique ram air scoop and control surface actuator structure.

Abstract: An alkaline nickel-zinc cell which has(1) a nickel-nickel hydroxide cathode;(2) a zinc-zinc oxide anode containing(a) a corrosion inhibitor such as PbO, SnO.sub.2, Tl.sub.2 O.sub.3, In(OHub.3, or mixtures thereof;(b) a slight corrosion accelerator such as CdO, Bi.sub.2 O.sub.3, Ga.sub.2 O.sub.3, or mixtures thereof; and(c) a zinc active material;(3) a mass-transport separator;(4) an alkaline electrolyte; and(5) means for charging the cell with an interrupted current having a frequency of from more than zero to 16 Hertz with a rest period of not less than 60 milliseconds.Another desirable feature is the use of a pressure-cutoff switch to terminate charging when the internal pressure of the cell reaches a selected value in the range of from 5 to 8 psig.

Abstract: A method and apparatus for electrical augmentation of steady state detonation waves in solid or fluid explosives. Two electrical conductors are disposed along opposed margins of explosive material and coupled across a source of electrical energy. When the explosive material is detonated and as the detonation wave propagates along the explosive material, electrical energy is furnished across the conductors and into the detonation wave which is more conductive than either the undetonated explosive or detonation product gases. The electrical energy coupled into the detonation wave adds energy over and above that which is normally delivered chemically and thus causes the detonation pressure and velocity to increase and therefore increases the ability of the explosive material to accelerate objects and do work.