Abstract: A sonar for detecting and localizing sources of high frequency sonar pulses n range and bearing in real time. Three hydrophones pick up sonar pulses and process them in their respective detectors for storing. Detection by all three detectors cause the stored signals to be sent to a cross-correlator computer for range and bearing calculation.

Abstract: An explosive-train, arming-rotor type fuze mounted flush with the skin of a eapon wherein the arming rotor is doubly out-of-line in the safe position, and where both linear translation and angular rotation is required to align the explosive train in the armed position. A visual and tactile indicator is provided, the fuze being "safe" when it remains flush, and being able to become "armed" when the fuze protrudes from the skin of the weapon.

Abstract: A fail-safe projectile fuze safety-and-arming mechanism comprises a rotor ving thereon an explosive train component, said rotor having its mass center on the projectile spin axis. Fixedly secured to the rotor is a pinion whih engages first and second drive gears provided with clearance spaces on the circumference thereof, wherein a plurality of gear teeth have face dimensions less than the thickness of the gears. The mass centers of the drive gears are offset from the geometric centers thereof. Engagement is continuous between each of the drive gears but, because of the clearance spaces, is intermittent between the drive gears and the pinion. Rotation of the rotor is controlled by the position and dimensions of the clearance spaces. A locking ball positioned in a raceway between the rotor and the housing of the device prevents undesired movement of the rotor.

Abstract: A pyrotechnically activated lithium-chlorine cell possessing high voltage, igh energy density and a high rate of discharge is composed of a porous graphite gas diffuser, a fused alkali metal salt electrolyte, a lithium anode in contact with the electrolyte, and a cartridge containing a pyrotechnic material disposed within the anode, all of the components being stacked inside a container that serves as the cell case. The porous gas diffuser is positioned within the cell case to provide a gas receiving chamber. Chlorine is introduced into the gas receiving chamber as the pyrotechnic material is ignited to activate the cell.

Abstract: A projection display for producing a bright image of pictorial quality from a large time bandwidth video signal produced by a plurality of light emitting diodes (LED's).

Abstract: Radon is directly measured by a portable device which is attached to the l of a mine or other area from which the gas may be emanating. The radon is collected and directed to an instrument having a gas proportional counter. To prevent build up of radon daughters on the gas proportional counter, with consequent high alpha particle background, a moving film surrounds the counter and carries away the radon daughters.

Abstract: Unsymmetrical nitro and fluoronitro acetals of the formulasROCH(CH.sub.3)OR'wherein R.noteq.R', but wherein both R and R' are selected from the group nsisting of-CH.sub.2 CXY(NO.sub.2), - CH.sub.2 C(NO.sub.2).sub.2 CH.sub.3,-ch.sub.2 cuvcxy(no.sub.2), and-CH.sub.2 CUVCWZCXY(NO.sub.2),wherein X and Y vary independently and are selected from the group consisting of F and NO.sub.2, and wherein U, V, W, and Z vary independently and are selected from the group consisting of H, F, and NO.sub.2, are useful as energetic plasticizers in rocket propellants or explosives.

Abstract: A one-piece sabot of the can type comprises an energy storage means posited between the obturator and the aft end of the subcaliber projectile and means for mounting the sabot on the projectile in one of a plurality of axial positions. Energy stored in the storage means during the initial phase of launch is released after launch to effect projectile-sabot separation.

Abstract: A retaining clip capable of repeated, reliable application of a high retention force on an elongated member, such as an arming wire, having a planar base portion with ends formed into upstanding, reversed S-shaped bends. The upper bend of one S-shape has a reduced width portion receivable in an aperture provided in the upper bend of the other S-shape. Stop means are provided on the reduced width portion which engage the sides of the aperture to restrict displacements to the elastic-range of the heat-treated material of the clip.

Abstract: A safing-and-arming mechanism for ordnance fuzes having an air speed sensor nd redundant means to prevent premature arming rotor movement. Upon weapon delivery, a spring-loaded snorkel is extended to unlock the first of two rotor locks and to direct a stream of air past a turbine wheel to drive an electric generator and a gear train through a centrifugal clutch. A winding disk is rotated to place a rotor spring in tension, the rotor being held against the spring force by a tumbler controlled by an explosive actuator. Upon an ignition signal from the electronic fuzing package, the tumbler is retracted and the rotor displaced to the armed position to align explosive components of a firing train.

Abstract: A junction photodetector employing Pb.sub.1-x Sn.sub.x Te in narrow film strips grown epitaxially on an appropriate substrate. An appropriate metal overlaps the film to form a metal-semiconductor contact.

Abstract: Solid gas generating and gun propellant compositions employing triaminogudine nitrate as a propellant ingredient in admixture with an oxidant and a suitable compatible binder material.

Abstract: The present invention relates to a method of producing low density polydi resins having high yield strengths and the products thereof. In particular a polydiene resin, such as dihydroxyl terminated 1,2-polybutadiene is reacted at room temperature with an organic chain extender, such as hexamethylene -1,6-diisocyanate, and a graft comonomer such as N-vinyl-2-pyrrolidone in the presence of a peroxide free radical initiator, such as O,O'-bis(t-butyl peroxy) diisopropylbenzene, whereby a elastomeric material having the peroxide and a graft comonomer dispersed therethrough is produced. At a subsequent period of time, the elastomeric material can be exposed to elevated temperatures whereupon the elastomer is cured to a low density resin having a high yield strength.

Abstract: Composite-modified double base propellants containing aluminum as a metal el having ferric fluoride added as a combustion catalyst, a thermal stabilizer and an aid in reducing exhaust plume interference with a radar guidance system.

Abstract: Fully dense ceramic articles are prepared by mixing powders of silicon nide, aluminum oxide and magnesium oxide to form a composite powder composition wherein the magnesium oxide acts as a sintering aid, forming the composite powder into a desired shape, and heating the shaped composite powder composition in the absence of applied pressure at a temperature sufficient to effect sintering of the composition.

Abstract: A modified Huggin's Scanner whose tunable signal bandwidth can be broadened ithout affecting the beam position and whose output beam direction is dependent on the control of a resistor. Two separate voltage controlled oscillators are utilized in this system in addition to modifying the input frequency controls to the scanner.

Abstract: A device for varying the velocity of infrasonic, sonic, and ultrasonic sound waves which has a sound wave transmission element made of a material having the formula R.sub.x Fe.sub.1.sub.-x wherein R is a rare earth selected from the group consisting of Sm, Tb, Dy, Ho, Er, Tm, and mixtures thereof and wherein 0.1 < x < 0.9, and means for generating a magnetic field of adjustable strength in the transmission element. The velocity of the sound waves within the transmission element increases with increasing magnetic field strength in the transmission element. This device can be used for generating time delays for sound signals in sonar equipment.

Abstract: An aerodynamic window for isolating different gases or different states of ases when typical transparent window material is not feasible. An adjustable, supersonic conical nozzle is mounted coaxially with an opening and a cylindrical tube is mounted to the opening and extends coaxially toward the conical nozzle. A sliding-wedge-type gate valve is used to close the tube. The start up procedure consists of adjusting the conical nozzle axially to equalize the pressure on both sides of the wedge valve. Once the pressure is equalized the wedge may be removed.

Abstract: An apparatus and method for determining the range and bearing of an object rom a reference position. Sound energy emanating from the object and travelling through a water medium strikes spaced hydrophones located at the reference position. The signals produced in each hydrophone are correlated with the signals in each of the remaining hydrophones. The signals are correlated with a variable time delay between signals and the resulting maximum correlation output determines the range and bearing of the object.

Abstract: Acetals of the formulas CHCl.sub.2 CH(OR).sub.2, CCl.sub.3 CH(OR).sub.2, .sub.2 CH(OR).sub.2, CF.sub.3 CH(OR).sub.2, RO.sub.2 CCH(OR).sub.2, and (RO).sub.2 HCCH(OR).sub.2 wherein R can be --CH.sub.2 CYZ(NO.sub.2), --CH.sub.2 CH.sub.2 CYZ(NO.sub.2), --CH.sub.2 C(NO.sub.2).sub.2 CH.sub.3, --CH.sub.2 C(NO.sub.2).sub.2 CYZ(NO.sub.2), --CH.sub.2 C(NO.sub.2).sub.2 CH.sub.2 CYZ(NO.sub.2) or --CH.sub.2 C(NO.sub.2).sub.2 C(NO.sub.2).sub.2 CYZ(NO.sub. 2) wherein Y and Z vary independently and can be Cl, F or NO.sub.2. These acetals are produced by contacting a negatively substituted aldehyde such as CHCl.sub.2 CHO, CCl.sub.3 CHO, CHF.sub.2 CHO, CF.sub.3 CHO, HO.sub.2 CCHO, or OHCCHO with a negatively substitute alcohol of the formula ROH wherein R is as defined above. Either FSO.sub.3 H, ClSO.sub.3 H, or CHF.sub.2 SO.sub.3 H, or CF.sub.3 SO.sub.3 H is used to catalyze the condensation. The acetals of this invention are useful as explosives.