Abstract: A floating torch burning polydimethylsiloxane to provide a decoy over the termediate infrared spectrum of a ship.

Abstract: An adjustable rifle rest including a cylindrical standard implantable into the ground, a rotatable yoke mounted on the upper end of the standard, a sleeve snugly but rotatably and slidingly engaging the standard, a member having a horizontal portion with one end fixed to the sleeve and the other end terminating in an upwardly extending vertical portion, a fixed yoke mounted on the upper end of the vertical portion of the member, a structure affixed to the lower end of the standard to aid in implanting the standard, and an assembly operable to vary the length of the standard.

Abstract: An improved method that directly and continuously determines the magnitude f the earth's gravity in relation to a user platform at one or more selected points on or above the earth's surface. An improved Global Positioning System (GPS) is used to carry out the method and is made up of a plurality of twenty-four (24) continuously orbiting GPS satellites that are arranged into three groups of eight satellites with each group or constellation being disposed in its respective plane of a series of three longitudinal planes. Each plane is arranged in predetermined angular and spatial relation to the earth's equatorial plane and the other planes of the series. Any GPS satellite continuously transmits a pair of encoded RF signals at predetermined L-band frequencies. By virtue of this global arrangement of the 24 satellites, the antenna field of view of a user platform is capable of receiving at any time the encoded signals of at least six satellites.

Abstract: The improved free electron laser device for scanning a spatial field is generally comprised of a drift tube and a rotatable mandrel. The mandrel is concentrically disposed in the tube so as to define an annular space therebetween. A series of canted mirrors of grooved-like configuration are formed about the mandrel in predetermined spaced relationship to each other and at a predetermined angle to a plane transverse of the mandrel. These mirrors function to reflect and phase redistribute various waves of the wave front so as to form a plurality of asymmetric diffraction patterns in the annular space. By reason of the nutating effect of the canted and rotating mirrors, the projected beam conically and continuously scans a region of the spatial field. In order to minimize the effect of skew waves, a series of circumferentially spaced and longitudinally extending rib-like baffles can be affixed to the tube interior between adjoining mirrors.

Abstract: A laser material for a solid state tunable laser comprises a potassium or rubidium halide crystal with lithium and/or sodium cation impuritites in a crystalographic structure with point defects consisting essentially of F.sub.2.sup.+ and (F.sub.2.sup.+).sub.A color centers and electron traps. The crystals are colored both additively and with ionizing radiation.

Abstract: A magnetic-field detection device useful as a sensitive magnetometer. The device employs a solid-state field-sensing element which experiences a change in permeability when it is exposed to a magnetic field. The change in permeability results in a change in skin depth and therefore in resistance offered by the element to passage of a high-frequency alternating current. The element is used as one arm of a balanced bridge circuit to which an A.C. voltage is applied. Upon exposure to a magnetic field, the bridge is rebalanced to a null, the amount of current flow or rebalancing being measures of the magnetic field strength.

Abstract: 2-(4-pyridyl)-5-aryloxazoles and certain quaternary salts of these compounds are useful as visible-wavelength lasing dyes. These dyes are used in solution with non-interferring polar solvents, such as low molecular weight alcohols, H.sub.2 O, and D.sub.2 O, to form lasing media useful in dye lasers. Such lasers generally include a reservoir for containing the laser dye solution and a pumping energy source operably coupled therewith for producing stimulated emission of the dye solution.

Abstract: A long line hydrophone wound with a pair of bifilar ribbons that are connected to a constant current high frequency source.

Abstract: An air conditioning system with incorporated evaporative cooling apparatus dapted to sequentially pass compressed air from a compressor through a heat exchanger and expansion cooling turbine and into an enclosure. A condensate extractor is interposed downstream of the expansion cooling turbine and located above the heat exchanger. A nozzle is mounted to the heat exchanger and connected via a water conduit to the condensate extractor so that gravity delivers extracted condensate to the nozzle. The nozzle communicates via an air conduit with the compressor so that compressed air disperses the extracted condensate through the nozzle to impinge upon the heat exchanger thereby effectuating evaporative cooling.

Abstract: A monolithic multi-point initiator for a warhead wherein a single detonator s connected by multiple interconnected conduits packed monolithically with an initiator compound that delivers detonating waves to a series of multi-point explosive charges or pellets located at or near either end of the warhead.

Abstract: An inertial guidance system for a rocket powered ballistic missile which vides navigation and control while the missile is proceeding in its flight trajectory. Signals are generated within the confines of the missile and without outside information representative of angular and linear motion of the missile with respect to an inertial frame of reference, a digital computer compares these signals against a preset parameter stored in the computer to provide control signals along the pitch and yaw axes. An autopilot uses these control signals to provide mechanical control movements, and an exhaust nozzle deflection arrangement connected to the autopilot deflects the exhaust of the rocket for guidance along a predetermined flight trajectory.

Abstract: An IR source and method for generating IR radiation whereby a propellant is urned in a first chamber to produce a product gas which is exited through a critical exit, is accelerated to a supersonic velocity by expanding into a second chamber, is passed through a standing shock wave in the chamber to reduce the gas velocity to a subsonic level, is exited through radial orifices into a larger third chamber where the gas is mixed to obtain a substantial uniformity in temperature and specie, is accelerated by expansion to a chosen subsonic velocity, and is exhausted to the atmosphere.

Abstract: A rain erosion resistant protective covering for aircraft having pointed or conical radomes and method of forming the protective covering. The protective covering is a layered material of polyurethane, contact adhesive, and polyethylene which is formed into the desired shape by precutting the material to the shape of the radome, placing the material in a mold, heating the material, and drawing a vacuum between the mold and material to draw the material into the shape of the mold, thus producing a cover having the shape of the mold.

Abstract: Apparatus for stabilizing a weapon launched from an aircraft. The weapon is rovided with a plurality of concentric rings mounted on the nose of the weapon for reducing nose lift. The tail of the weapon is provided with a plurality of wedge shaped fins positioned on a decreasing tail diameter which increases the tail stability while minimizing tail lift. The outer faces of the fins are of a multi-tiered construction with angled portions connecting the tiers.

Abstract: The inclusion in a double base propellant of a ballistic modifier selected rom the class consisting of copper, lead, tin, and bismuth chelates of a dihydroxybenzophenone or alkoxyhydroxyphenzophenone.

Abstract: An apparatus for and a method of determining the material properties of a dielectric and/or conducting radar target by deciphering the backscattered signals returned from the target is disclosed. The resonance "code" of the echo signals from the target is a function of the width and spacing of the resonant spectral lines in the transverse electric (TE) and transverse magnetic (TM) modes of the returned signals. The resonances present in any TE or TM mode become uniformly spaced and of uniform width at high frequencies. The uniform spacing between adjacent resonances is used to uniquely determine the dielectric constant of the material comprising the target, and their uniform width is used to uniquely determine its thickness.

Abstract: A digitally activated display scale in association with digital-electronic ircuitry, displays both the airspeed and airspeed trend of a landing aircraft. The digital/electronic circuitry process an analog voltage corresponding to an airspeed range of 80 to 179 knots to produce a digital number representative of the airspeed of the landing aircraft. The digital number is used to produce a continuous display of the airspeed and to indicate the trend of the airspeed as either increasing or decreasing.

Abstract: Uniquely integrating a search mirror and a deflection mirror with a passive ptical rangefinder and a remote sextant, enhances the operation of both devices. The improved rangefinder/sextant provides day/night 360.degree. azimuthal and at least -5.degree. to about 60.degree. elevational search capability with the additional capability of pointing the search mirror at a navigational star in a direction different from that of an imaging camera. Thus, the imaging camera, can be pointed at the sea horizon that is least obscured by haze and/or sea clutter, thereby allowing altitude readings under adverse conditions.

Abstract: N,N,N',N'-tetrakis(2-fluoro-2,2-dinitroethyl) oxamide, ##STR1## which is prepared by the following reaction sequence ##STR2## N,N,N',N'-tetrakis(2-fluoro-2,2-dinitroethyl) oxamide is a high density, energetic explosive which is melt castable as well as thermally and hydrolytically stable.