Abstract: A bolt of a dead bolt lock is moveable between a locking position and an ocking position by application of a pressurized fluid. In both the locking and unlocking positions a plurality of locking balls are urged into locking engagement with a locking groove and are maintained in such locking engagement by a resiliently urged locking cam without the necessity for maintaining the pressurized fluid once the required condition is attained. Application of the pressurized fluid unlocks the bolt, displaces it to its alternate position and locks it in place.

Abstract: An apparatus and method for detecting medium and high atomic weight eleme includes a sampling mechanism for removing particles of an element to be detected from the aerosol and confining the particles to a selected geometry. The aerosol may, for example, be pumped through a filter with the particles being confined on a defined area of the filter. The selected geometry is then irradiated with x-rays to cause the particles to fluoresce and produce secondary x-rays. The secondary x-rays are detected and analyzed using criteria which determine the identity and concentration of the particles in the selected geometry. The air stream of the aerosol through the filter can be measured to determine the volume of aerosol from which the particles were removed as an aid in determining concentration.

Abstract: A projectile that is to be fired through a gun tube with high pressure gas, as a central load and a jacket. The jacket encircles the load and has a rearwardly directed appendage flaring outwardly from the jacket. This appendage is formed of a flexible material for outwardly and radially deflecting in response to application of said high pressure gas.

Abstract: An adapter is mounted on a gun barrel near its free end. The adapter conts spaced-apart fulcrums with an actuator between the fulcrums for bending or flexing the barrel with respect to the fulcrums. This bends the barrel, causing the muzzle of the barrel to move and thus re-air the barrel independently of a mount which carries the barrel. The adapter can be used in a rapid fire weapon. The flexing condition of the barrel at each round of a burst of fire is recorded and then used to supply forces to the barrel during a subsequent burst of fire. The applied forces compensate for the uncontrolled flexing of the barrel to increase accuracy.

Abstract: A high pressure, short rise time pulse is generated by first pressurizing a arge chamber utilizing a pressure fluid. An initially closed channel communicates the large chamber with a small test chamber that is closed except for the channel and to which one or more pressure gauges are connected. One of the pressure gauges may be utilized as a standard to indicate pressure in the chamber while another one of the gauges can be calibrated utilizing the device. The channel is abruptly opened to discharge the high pressure fluid from the large chamber to the small test chamber. Only a small amount of fluid enters the small test chamber but the pressures in the large and small chamber are equalized rapidly so that the small chamber experiences a high pressure, short rise time pulse.

Abstract: The invention relates to destructive crossovers for explosive logic circu, wherein two crossing paths of explosive material are embedded in a substrate in two separate planes. The first path which detonates across the intersection destroys the intersection so that the second path may detonate only to that point. The invention provides for minimal detonation pressure at the intersection, so as to avert the prior art problem of detonations turning the corner. This is accomplished by placing the paths on different planes.

Abstract: A detonator comprises a housing which contains a weak explosive charge igable by a bridge wire and a piezoelectric semiconductor buffer positioned in the housing for receiving a shockwave from the weak explosive charge when it is ignited. A high voltage lead is connected to the buffer for applying a high voltage signal to the buffer. If the high voltage signal is applied to the buffer at the same time that the weak explosive charge is ignited, the piezoelectric buffer will amplify a shockwave from the ignited charge to produce a detonation charge of sufficient amplitude to ignite a secondary or main charge which can form part of the detonator or be positioned against a surface of the detonator. In this way only the simultaneous ignition of the weak explosive charge and the activation of the piezoelectric buffer will cause ignition of the secondary or main charge.

Abstract: This combined ejector-rammer, or ejectomer, is a single mechanical device ich performs the functions of both an ejector and a rammer for small arms which use cartridge type ammunition. An ejectomer lever is attached to the side of the weapon's bolt by means of a pair of pins and a spring. The pins move in elongated slots in the lever, one of which is linear and the other L-shaped. The forward end of the lever acts as a rammer to push each fresh round up a ramp into the firing chamber. After firing, a conventional extractor removes the spent cartridge case from the chamber and as the spent case moves down the ramp, the spring and the pins cause the lever to move in such a way that the extracted case is ejected.

Abstract: Improved measurement of optical material degradation is provided by a comator utilizing a vidicon focused upon an illuminated white contrast target card. The optic under test is positioned between the vidicon and the target. The output of the vidicon as it scans the card is compared with the output for an undamaged optic.

Abstract: The invention concerns an electromagnetically launched projectile having an rmature comprised of refractory metal washers, each of which being coated with a thin film of cathode emitter material. The low work function metal generated by the heat of arcing rises to the armature surface through the capillaries formed between the armature washers. The arc occuring between the rail of the electromagnetic launcher and the armature is lowered due to the formation of a low voltage metallic discharge. The reduced arc drop lowers the erosion rate on the rails which reduces the rail damage resulting in increased firing rate and longer rail life.

Abstract: A roll measurement system for a flight vehicle, such as a tank-launched ged projectile or guided missile, includes a power source and a pulsed laser, such as a laser diode, which propagates a laser beam which is focused into a narrow conical beam and directed toward the earth. The laser beam's reflections from the earth are detected, for example, by a photo-diode, and converted into an analog electrical signal. The signal is converted to digital form and analyzed to determine its nadir (the shortest path-length to the earth). A microcomputer compares the immediate nadir determination with stored nadir determinations to compute the angle and rate of roll of the flight vehicle.

Abstract: An electrically detonated fuse for a grenade is shown, used either as a b up system for the usual mechanical detonator, or independently as the sole arming and detonating means. The invention is considered more accurate and dependable than a mechanical system, which is aimed at the objective of reducing the amount of grenade duds, the dangerous phenomenon of still live grenades unexploded upon impact creating a hazardous situation for military and other personnel. The invention uses the ordinary action of the currently used inflated ribbon which is extended from the grenade while it is in flight, to generate an electromotive force signal via a piezoelectric crystal. An electrically activated detonator is installed next to the grenade's main charge, for blowing the device when the electrical detonator is switched on. A large surge of power is fed to the electrical detonator by the closing of an electrical impact fuse, when the grenade physically impacts a target.

Abstract: In a munition comprising a cartridge case, a subcaliber penetrator, and a ltipartite sabot for enabling propulsive discharge of said penetrator from said case, the improvement which comprises a film of curable sealant deposited on said sabot and said penetrator so as to prevent passage of propulsion gases between the parts of said sabot, and between the sabot and the penetrator.

Abstract: An accurate, instantaneous determination of geometric standard deviation gma.g of particle size distribution of aerosols, permitting verification that the test aerosols fall within suitable specifications and are giving test results that are truly representative of the degree of protection from smoke and aerosols that representative mask filters and filter media afford under actual use conditions. Provided herein is a more precise means of measuring aerosol penetration of gas masks. Determination of geometric standard deviation includes the steps of transmitting focused and coherent or optically filtered light from a source to a chamber containing an aerosol sample and then detecting and comparing the intensity of polarized light scattered at a first angle relative to said light source to the intensity of polarized light scattered at a second angle relative to said light source.

Abstract: An adaptor for attachment to the end of a rifle allows an individual to f from the rifle a different projectile than originally designed for the rifle, without substantial degredation in overall accuracy and throw distance of the rifle. The adaptor has a rifled cylinder which in the typical application will have progressive twist rifling. The tangential force acting upon the projectile within the progressive twist rifling area has a semi-elliptical shape and an exit value of approximately zero. An adaptor ring and outer shell are preferably employed to mount the rifled cylinder to the rifle and for aligning the adaptor axis and rifling with the rifle barrel axis and rifling.

Abstract: Snapshot data from a projectile traversing a resisting medium are analyzed o determine a lower critical value within the resisting medium where rapid yaw growth begins and a yaw-growth constant governing yaw growth from the lower critical value to an upper critical value. Snapshot data from additional projectiles are similarly analyzed. Curves produced by the solution of a differential equation, including the lower critical value and the yaw-growth constant, are overlaid graphically or analytically to provide an increased data density sufficient to improve substantially the ability to predict the yaw performance of the projectile.

Abstract: A glow/corona discharge device for use in detoxifying air at atmospheric ssure. The device includes a generally cylindrical supporting structure with a plurality of self-contained modular discharge units (or power packs) mounted around the surface thereof. Each module contains a flow channel in which the electrical discharge is maintained and through which the air being processed is passed. The modules are designed for ease of inspection and maintenance and include a plurality of ballast resistors each in series with an adjustable cathode pin. The flat anode plate is located on the opposite side of the flow channel from the cathode pins.

Abstract: An elastic puller sabot for use with a small caliber flechette to be laund from a bore of a launcher. The sabot comprises at least two portions, which, when placed together, have an interior surface conforming to the shape of the flechette, and an exterior surface conforming to the shape of the bore. The sabot preferably comprises a material which is capable of deforming elastically inward about the flechette, to grip it securely during launch, and outward toward the interior of the bore, to improve the sealing of the flechette in the bore, without the need for a retaining member.

Abstract: The invention concerns a technique and apparatus for protecting sensitive ectronic components against the high accelerations encountered in a tank-powered projectile, for instance. A first ring is placed on a circuit board and filled with an RTV compound. A cap is placed on the first ring to force excess RTV compound from the first ring, and is removed once the RTV compound cures. A second shorter ring is placed about the RTV compound and is attached to the circuit board. A flat plate is then used to press the RTV compound into any voids which may exist between elements mounted on the circuit board. Circuit modules created in this manner may be stacked upon one another and interconnected.

Abstract: An improved choke feed is provided for minimizing the inductive fly-back tage phenomenon at the inputs of voltage chopper circuits. By using directional shunts, fly-back energy is recovered and passed through to the chopper circuit for improved efficiency.