Abstract: Metal oxide varistors are connected in parallel with grounded capacitors to oad outlet terminals coupled to a power source through inductor coils forming a low pass filter with the capacitors to delay propagation of a voltage increasing transient pulse to the power source until ground shunting paths of low resistance are developed in the varistors. Electromagnetic shielding partitions the inductor from the capacitors and varistors within a power outlet box mounting the load outlet terminals to prevent interference with absorption of transient energy by the varistors during the delay in establishing the ground shunting paths.

Abstract: Radiant energy intermittently emitted from a transmitter is reflected as o pulses from a moving target being interrogated to produce Doppler signals by counting of photons of the echo pulses during time domain intervals between emission from the transmitter. Such counting of photons is limited to the time domain intervals by operational control of a laser pump through which a reference beam is generated at an energy level activating detectors irradiated by such beam to count the photons absorbed therein after capture of the photons by a receiving antenna.

Abstract: A firing circuit for use in booby traps providing four different operatio modes. A capacitor stores energy which is discharged through an electrical detonator upon the activation of a silicon controlled rectifier. The silicon controlled rectifier is activated by transistor circuitry in the event of supply voltage depletion or the physical parting of a break-wire by a target. It is also activated by a delay-timer for timed self-destruction and by circuitry responsive to vibrations in the firing circuit generated by the target.

Abstract: N-(2-Hydroxyethyl nitrate)-2,4,6-trinitrobenzamide which is an explosive h good thermal stability at 150.degree. C.

Abstract: An electric primer for cartridge ammunition (e.g., Phalanx 20 mm cartridg is designed to minimize antenna coupling, capacitive coupling, and aperture coupling of stray electromagnetic radiation thereinto for avoiding accidental primer detonation with resulting ignition of cartridge propellant. The primer is provide with a button electrode which is deeply recessed totally behind a small diameter access aperture which physically guards the button electrode from antenna and capacitive coupling. Furthermore, the small opening channels stray radiation about its periphery rather than admitting it to the button.

Abstract: A reaction vessel comprising (1) a porous ceramic structure having intercecting, open pores and (2) silver metal coating the inner ceramic surfaces of the reaction vessel and filling the interconnecting, open pores to form a strong bond between the porous ceramic structure and the silver coating.The reaction vessel can be produced by(1) coating the inner surface and infiltrating the continuous, open pores of an unglazed porous ceramic structure (or vessel) with molten AgNO.sub.3 ;(2) decomposing the AgNO.sub.3 to silver metal; and then(3) repeating steps (1) and (2) until all the pores are filled with silver metal.

Abstract: An energetic plasticizer for double base propellants comprising (1) a mixe of sorbitol tetra-,penta-, and hexa-nitrate (MSN) and (2) a polyolpolynitrate selected from the group consisting of diethyleneglycoldinitrate (DEGDN), triethyleneglycoldinitrate (TEGDN), nitroglycerin (NG) and mixtures thereof. Also included are compound formulations for double base, modified double base, and composite modified double base propellants incorporating the above energetic plasticizer.

Abstract: Magnetostrictive wire having a low surface-to-volume ratio established by a onstant non-planar cross-section, is helically deformed into contact with a shaft under a stress maintaining the wire in fixed relation to the shaft surface. Magnetic anisotropy is imparted to the wire by twist thereof about its cross-sectional axis while the wire is being helically deformed into contact with the shaft surface to form a torque sensor through which accurate torque detection is achieved.

Abstract: A process for producing a lightweight electrode grid by exposing a heated t of dense graphite fibers to Ni(CO).sub.4 gas wherein the Ni(CO).sub.4 decomposes upon contact with the graphite fibers depositing nickel metal coating on the graphic fibers. The nickel coated graphite fibers are then sintered to form the grid. Nickel or cadmium electrodes are made by attaching a current collector to the grid and impregnating the grid with the appropriate nickel or cadmium active material.

Abstract: A method of preparing difluoroformals of the formula(RCH.sub.2 O).sub.2 CF.sub.2,wherein R is --C(NO.sub.2).sub.3, --CF(NO.sub.2).sub.2, --CF.sub.2 (NO.su), --C(NO.sub.2).sub.2 CH.sub.3, or a fluoroalkyl group such as --CF.sub.3 or --CF.sub.2 CF.sub.3, by reacting the corresponding dichloroformals with hydrogen fluoride in pyridine. These difluoroformals are useful as energetic explosive and propellant ingredients.

Abstract: A nonvolatile random access memory is formed by thin permalloy shaped into "wiggle" patterns and magnetized to establish a plurality of memory cells arranged into an array. Magnetic domain walls are formed at apexes of the "wiggle" pattern in each memory cell after a predetermined magnetic field is applied along the hard axis of the memory cell array by magnetization so aligned. Row address lines for reading and writing into the memory cells and column address lines for writing into the memory cells are provided to conduct currents through each column of the array for magnetoresistance readout.

Abstract: Energetic compounds of the formula ##STR1## wherein R.sub.1 is --OCH.sub.2 CH.sub.2 C(NO.sub.2).sub.3, --OCH.sub.2 C.sub.2).sub.2 CH.sub.3, --OCH.sub.2 C(NO.sub.2).sub.3, --OCH.sub.2 CF(NO.sub.2).sub.2, --OCH.sub.2 CF.sub.2 (NO.sub.2), or --OCH.sub.2 CF.sub.3, and wherein R.sub.2 is --OCH.sub.2 CH.sub.2 C(NO.sub.2).sub.3, --OCH.sub.2 CF(NO.sub.2).sub.2, --OCH.sub.2 CF.sub.2 (NO.sub.2), --OCH.sub.2 CF.sub.3, --NH.sub.2, --NHCH.sub.2 CH.sub.2 ONO.sub.2, or --N(NO.sub.2)CH.sub.2 CH.sub.2 ONO.sub.2.

Abstract: Break-up activity of water by injection of hot propellant gas into channels f a thrust expansion engine is suppressed to prevent rapid cooling of the gas, utilizing one or more methods including injection of a secondary inflow of the propellant gas and/or the water under lower pressures into the channels, injection of a viscosity enhancer and/or surfactant into the inflow stream of the water and restricting outflow of the water from the channels by means of convergent nozzles.

Abstract: Process for the production of ingots of castable discontinuous metal matrix omposites by encapsulating particulate refractory material of the B.sub.4 C or SiC in a matrix metal of Li or al to form a solid master alloy, and introducing the master alloy into molten Mg or an alloy thereof, mixing and then cooling to solidify the resultant mixture and form an ingot with the refractory material substantially dispersed in the ingot.

Abstract: A nitrate ester which is 1,3-diamino-5-(hydroxyethylaminonitrate)-2,4,6-titrobenzene or 3-amino-3'-(hydroxyethylaminonitrate)-2,2',4,4',6,6'-hexanitrobiphenyl.

Abstract: A spark-free portable air eductor for purging fumes from aircraft fuel ta that have contained a low vapor pressure liquid. A conical tube passes through an access opening in the tank to be purged. The conical tube has its larger diameter opening residing within the tank and its smaller diameter residing outside the tank. A jet introduces a low pressure air flow into the conical tube along its longitudinal axis. The jet is located at the smaller diameter opening of the conical tube. A cylindrical tube is connected to the smaller diameter opening of the conical tube. As low pressure air exits the jet, a vacuum is created at the larger diameter opening of the conical tube thereby causing a large volume of air to pass through the tank, thus purging an aircraft fuel tank without use of electric power. The large volume of air moving through the tank reduces the time required for the tank to be purged of all fumes.

Abstract: The present invention relates to a Bloch-line memory element and a nonvolatile RAM memory using such a Bloch-line memory element. The Bloch-line memory element comprises a planar magnetic memory element having magnetic domains separated by a wall which contains a Bloch-line disposed within the individual memory element. Coincident write lines interact with the magnetic element for writing a Bloch-line to a predetermined area within the memory element. For sensing the presence or absence of a Bloch-line within the predetermined area, one write conductor and a sense line are used for determining the logic state of the particular memory element. A plurality of memory elements are disposed in an address matrix and can be selected for reading from or writing to the particular Bloch-line RAM memory element for determining or writing bits of words.

Abstract: A high energy explosive composite which comprises(1) from about 2 to about 30 weight percent of an energetic polymer matrix f a urethane which is the reaction product of(a) a hydroxy-terminated prepolymer of the formula ##STR1## where R is --CH.sub.2 CF(NO.sub.2).sub.2 or --CH.sub.2 C(NO.sub.2).sub.2 CH.sub.3 ; A is --CH.sub.2 CH.sub.2, --CH.sub.2 OCH.sub.2 --, or --CH.sub.2 OCH.sub.2 OCH.sub.2 --, and n>1, and(b) a polyisocyanate which is used in an amount sufficient to supply from about 0.8:1 to about 1.5:1 isocyanate functional groups for each hydroxy functional group;(2) from about 8 to about 20 weight percent of an energetic plasticizer; and(3) from about 50 to about 90 weight percent of an explosive;wherein the energetic plasticizer and explosives are uniformly dispersed throughout the energetic polymer matrix.

Abstract: A continuous process for forming spheroidal high bulk density nitroguanid crystals from an aqueous solution of nitroguanidine which contains methylcellulose and partially hydrolyzed poly(vinyl alcohol) as crystal habit modifiers. A saturated aqueous solution of nitroguanidine is formed at a temperature T.sub.1 where 70.degree. C..ltoreq.T.sub.1 .ltoreq.100.degree. C. and crystallization occurs at a lower temperature T.sub.2 where 20.degree. C..ltoreq.T.sub.1 -T.sub.2 .ltoreq.50.degree. C.

Abstract: A process for producing high bulk density spheroidal nitroguanidine by fong a solution of from 2 to 9 weight percent of nitroguanidine, 0.5 to 2.0 weight percent of methylcellulose, and 0.5 to 2.0 weight percent of partially hydrolyzed poly(vinyl alcohol) in water at a temperature of from 50.degree. C. to 100.degree. C., and then cooling the solution at a rate of from I to 20.degree. C./minute until the solution temperature is less than 40.degree. C.