Abstract: A sheet explosive employing a fine particle size filler in which a portion hereof is replaced by a plasticizer diluent providing castability at moderate temperatures while maintaining high rates of detonation. The material is crosslinked under mild conditions to eliminate thermoplasticity.

Abstract: A dual, side-mounted inlet for air-launched ramjet missiles that require h angle-of-attack capability. The inlets are located symetrically on both sides of the vehicle pitch plane at an optimum angular displacement around the vehicle's lower surface from windward side meridian, lying in the pitch plane. The inlet pressure recovery and relative weight flow reach maximum values at angular displacements between 45.degree. and 60.degree. at positive angles of attack. The inlet is attached to the vehicle with a conventional boundary layer diverter of minimum height.

Abstract: 3. An underwater moving-target detection system comprising, in combination, eans for generating and projecting acoustic energy at an adjustable carrier frequency as generated, means for receiving resultant reflected acoustic energy including water reverberation, false-target echoes at substantially reverberation frequency, and moving-target echoes at differing frequencies, means responsive to said received reverberation and adapted to readjust said generated carrier frequency to such value that the frequency of resultant reverberation, as received, is substantially of predetermined fixed value, and coincidence circuit means for enabling utilization of only such said echoes which as received exhibit frequencies differing from said predetermined fixed value of frequency by more than a target-doppler threshold value.

Abstract: Apparatus for receiving the horizontal and vertical electric field compons of incoming VLF, LF, and MF (10 KHz to 3000 kHz) signals that is easily portable and installed within minutes aboard aircraft with windows. A sheet of metal or matrix of interconnecting wires is placed against the inside surface of non-conducting windows on each side of the aircraft fuselage and used as the receiving antennas. The voltage sum of the two window antennas is proportional to the vertical electric field. The voltage difference of the two window antennas is proportional to the horizontal electric field particularly when the antennas are forward or to the rear of the wings extending from the fuselage.

Abstract: An improved dual threshold switch is actuated by magnetic fields in the sch's proximity. An elongate glass envelope contains a pair of reed contacts. The contacts are biased by a piece of donut-shaped magnetic material circumscribing the envelope to be switched to a closed position at one magnetic threshold or an open position at another magnetic threshold. Both magnetic thresholds are induced in the contacts by external actuating magnets and the thresholds can be changed by physically moving the donut along the elongate glass envelope. A coil is provided and encompasses the envelope and magnetic donut to provide an electro-magnetic field which shifts the biasing field induced by the donut. When the electro-magnetic shifting field is turned on the thresholds established by the biasing field are shifted so that the contacts would be actuated from external actuation fields at different magnetic thresholds.

Abstract: A technique for testing decision-making devices of the Yes-No, or friend ept type in order to determine their operating performance characteristics. Binary information having predetermined characteristics is applied to a device under test, and response by the device observed.

Abstract: A tunable, electroabsorptive, semiconductor detector or detector-modulator for detecting or modulating radiation near the absorptive edge of the detector, which edge can be tunably shifted by back biasing.

Abstract: An antenna which conforms to the surface of a non-metallic helmet for man-the-move communications. A metallic electronics housing mounted on the helmet and judiciously arranged antenna fingers comprise the radiating structure which is operable over a wide band of frequencies without tuning.

Abstract: A two axis, three gimbal tracker for use with a missile or the like. The cker utilizes a lens barrel which has unlimited angular freedom in one axis, and more than 50.degree. of angular freedom in the other axis, and is mounted to the side of the carrying vehicle.

Abstract: A face seal for an electrical feedthrough in a bulkhead subject to large ferential pressures comprising a metallic bolt routed through a hole in the bulkhead; an electrical conductor soldered to the head of the bolt on the high pressure side of the bulkhead; an epoxy-resin seal molded around and bonded to the protruding head of the bolt and having a conical undersurface mating with the bulkhead so that a thin ring forms the interface between the epoxy seal and the bulkhead; and, a nut screwed on to the threaded end of the bolt on the low pressure side of the bulkhead. The thin ring interface between the epoxy seal and the bulkhead deforms when the epoxy seal is subjected to external pressure so that the seal pressure is amplified.

Abstract: A continuous run, single axis, single degree of freedom gas operated flui inertial gyro comprising a housing, a gimbal assembly supported in the housing on gas thrust and journal bearings, a turbine type spin rotor with axle mounting the rotor in the gimbal assembly, and shaft means forming part of the gimbal assembly and providing passageways to channel input flow to and vent flow from the gas turbine type spin rotor along and parallel to the gimbal axis to minimize drift error. The gyro is also provided with a pneumatic torquer to provide gimbal adjustment and fluidic pickoff to provide analog gas pressure readouts of pounds per square inch convertible to angular deflection in degrees.

Abstract: A method of coprecipitating a mixed oxalate to be used as a laser material in which one of the reactants is introduced as droplets formed by an aerosol into a bath containing the second reactant.

Abstract: An aircraft stores suspension and release device including extendible ejers for forcibly ejecting an attached store. The extendible ejectors are hydraulically actuated and dependently connected for positive control and the degree of extension of each ejector is independently adjustable. The extendible ejector may be connected together by mechanical or hydraulic linkage which may be gas, hydraulically or mechanically operated.

Abstract: An apparatus for providing ignition of rocket motors by using sequenced iiation to an explosive logic network that is fail safe in case of accidental initiation. The explosive logic network has a multiplicity of input detonators for ignition of the explosive logic in a predetermined time program which must be accomplished in a specific ignition sequence to achieve a single explosive output to ignite the rocket motor squib and fire the motor. A deviation from the predetermined timed sequence or ignition of one or more of the input detonators will dud the system causing a fail safe condition of the logic network that prevents rocket motor ignition.

Abstract: The present invention relates to a time and frequency control unit which is apable of compensating for long-term crystal oscillator drift and other errors in a reference oscillator signal by both coarse and fine (vernier) controlling. The invention takes the reference oscillator frequency, f.sub.o, divides it by a controlled factor a and mixes f.sub.o with f.sub.o /a to produce an f.sub.o + f.sub.o /aSignal. The f.sub.o + f.sub.o /aSignal is then divided by a second controlled factor b and mixed again with f.sub.o to yield a signal of frequency f.sub.o .+-. (f.sub.o + f.sub.o /a) 1/b,Where f.sub.f, the final output frequency, is determined after a filter stage sets the operation sign of the above expression (to plus or minus). Where f.sub.f is intended to be constant with a changing f.sub.o, the values of a and b are changed. From the above expression, it is apparent that a change in a makes a fine correction whereas a change in b translates the frequency with a coarse adjustment.

Abstract: Amino compounds are applied to steel and aluminum by direct application and lso from solution, and then subjected to ultraviolet radiation to produce photooxidative polymerization of the coating on the surface of the metal. Adherent thin film polymers are thus produced on the metal which resist wetting and are corrosion resistant to prevent rust or oxidation of the metal.

Abstract: The present invention relates to improved method and structure for producing an electric discharge in a laser cavity which eliminates arcing and permits electron energy to be chosen based on energy requirements for accelerating the electrons rather than energy and/or pressure requirements for supplying electrons. An auxiliary discharge is maintained to provide the electrons necessary for laser excitation. A transverse electric field is then superimposed to impart the energy required to accelerate the electrons.

Abstract: Chemiluminescent materials are encased in a thin, highly frangible shell to orm a quantity of microcapsules which, when distributed evenly and in adequate concentration over a perimeter zone, detect infiltration of troops, vehicles, etc. by the chemiluminescence which results from the crushing of the shells. One distribution system uses capsules filled with a chemiluminescent material such as tetrakisdimethylaminoethylene (TMAE). When the capsules are crushed and the contents are exposed to atmospheric oxygen this material oxidizes vigorously to produce a relatively long-lasting chemiluminescence. Another two-component system utilizes capsules containing different chemical components which, when crushed and combined one with the other, produce the chemiliminescence. Both systems employ a shell formed of a film-forming coating material hardenable, into a water-soluble, air tight shell non-reactive with the active filler material.

Abstract: A submersible object having a drag reducing coating thereon, and a method r its preparation, which comprises applying to the object a binding agent and sufficient hydrophobic silica to provide the object with a nonuniform coating, the function of the binding agent being merely to fix the hydrophobic silica on the submersible object.

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.