Abstract: The compound, 5,7-diamino-4,6-dinitro-benzofuroxan is formed by (1) forming reaction mixture containing 4,6-dinitro benzofuroxan, KHCO.sub.3, NH.sub.2 OH HCl and water; (2) forming the potassium salt of the desired compound by adding KOH to the reaction mixture; and (3) adding HCl to replace the potassium ion of the salt with hydrogen. The compound is useful as an explosive.

Abstract: A spherical warhead is disclosed which yields a greater than 120.degree. ped charge of preformed fragments and which further permits non-destructive cook-off of explosives to prevent undesirable detonation.

Abstract: An electrically controllable "Pyrofuze" pin device for ordnance device acation which functionally replaces the mechanical barrier and arming wire or other rigid and removable means used to provide ordnance device activation. The device includes a "Pyrofuze" pin, a connecting ignitor transfer charge, and ignitor, and electrical terminals to provide power from an external power supply, and a weatherproof housing. When electrically activated the "Pyrofuze" pin is reduced to molten by-products which functionally eliminate the mechanical barrier and permits the activation of the ordnance device.

Abstract: A test arrangement for testing stripline mounted coils includes a resonant robe having a planar mounted coil imbedded in a dielectric housing. A signal generator connected to the probe and a readout device connected to the stripline complete the test arrangement.

Abstract: An ordnance venting system is provided to reduce the danger of explosion in rdance items exposed to fires and includes an ordnance item having a number of holes in the ordance casing, each hole being covered by a bimetallic patch which will deform when subjected to high temperatures, and each patch being attached by means such as brazing, soldering or adhesive bonding.

Abstract: A pyrotechnic ignition train for use in dual nozzle rocket-ramjet missiles herein a donor device and a receptor charge in the train allow transfer of a pyrotechnic impulse across an air gap between an outer nozzle and an inner concentric nozzle to allow ignition of the rocket motor. Upon consumption of the rocket fuel the inner nozzle is jettisoned, and the ramjet motor fired. Absence of physical connection of the nozzles at the ignition train allows easy separation of the inner nozzle from the missile.

Abstract: A multiple quantum well device having a wide well and a plurality of narrower wells spaced from each other and sandwiched between a plurality of barriers and with quantum coupling existing between the wells. Semiconductor substrates and optimal well and barrier widths are selected to yield band gaps and charge localization within the wells such that the energy differences between the ground state of the wide well and the N excited states of the narrow wells correspond to the energy of a photon in the desired spectral range.

Abstract: A device mounting a fuze in the casing of an ordanance item and providing r pop-out of the fuze to reduce cook-off hazard when the casing is heated. The device has an outer sleeve fixed to the casing, an inner sleeve slideably mounted in the outer sleeve and receiving the fuze, and a resilient element urging the inner sleeve and the fuze from the casing. The sleeves are retained together at normal temperature by a layer therebetween of material which melts at a higher temperature to release the inner sleeve and fuze.

Abstract: An actuator, which directly converts fluid pressure to rotary movement, has generally cylindrical and helically fluted circumferential wall, an end wall bearing an output member, and a fixed opposite end wall. The actuator may be a one-shot device providing substantial torque and driving the output member through a relatively wide angle by having a pyrotechnic gas generating charge mounted inwardly of the fixed end wall and by exceeding the elastic limit of the circumferential wall which is metallic to so as to withstand pyrotechnically generated gas.

Abstract: An improved integral marine propulsion unit is disclosed that can generate a thrust vector in any of three degrees of motion. The unit utilizes both collective and cyclic propeller blade pitch angle variation to generate these thrust. This unit obviates the need for control surfaces and rudders for motion control of a marine vessel. Additionally, this unit provides flexibility in external propulsor arrangements on a marine hull. The unit integrates the swash plate mechanism and actuators within the central bore of a ring type prime mover.

Abstract: A power converter unit includes a pair of switching DC/DC converter secti for positive and negative voltages which incorporate a MOSFET switching arrangement in which a pair of MOSFETs are forced to share the output load current equally, a current limiting arrangement which activates shutdown whenever the current threshold limit is exceeded, and an internal grounding arrangement which minimizes output of current spikes by isolating the switching spikes from the input and output. The current limiting arrangement includes a resistor for sensing the voltage between the input and output of the converter and a comparator for comparing the sensed voltage with a reference threshold voltage and being operable to shut down the converter when the sensed voltage exceeds the reference threshold voltage.

Abstract: A solderless, feedthrough radio frequency filter has plates with individual openings for a plurality of physically parallel, elongated conductors. To provide capacitance, the plates are constructed of electrically conductive material and the conductors covered with dielectric material where they pass through the openings. To provide inductance, the conductors are circumscribed by sets of ferrite beads adjacent to the plates. The filter may be tuned capacitively by selecting the plate thickness and tuned inductively by selecting the configuration of the beads. More complex filters may be constructed by using a plurality of plates, including nonconductive plates, and a plurality of bead sets spaced along the conductors.

Abstract: A broadband, polarization diversity, monopulse antenna comprising a body celed current array and radial arm-coupled log periodic loop antenna in combination with associated mode forming, beam forming and feed networks.

Abstract: The present invention is an improvement upon conventional single-screw menisms in that the gaterotor housing is substantially isolated from both the inlet and outlet port areas by a window opening path through the casing whereby the gaterotor teeth pass for engagement with the mainrotor. The window path has been extended and has close clearances provided on both sides of the entering gaterotor teeth creating two barriers to internal leakage thereby reducing window path losses, increasing volumetric efficiency and allowing higher pressure capability.

Abstract: A system is disclosed for detecting and locating the occurrence of anomal to radio frequency electromagnetic transmission in conductive liquids. Applications are described for use in swimmer detection and for process monitoring.

Abstract: An apparatus and method for the elimination of marine fouling of marine mechanisms such as underwater fluid distribution emission systems. A grommet nozzle made of plastic materials containing an antifoulant and having a capability of easy installation forms a basic part of the apparatus. The grommet nozzle of the invention is formed of a polymer or a mixture of polymers containing a material toxic to calcareous marine organisms and capable of release of the toxic material into the environment at such a rate that the marine organisms grow extremely slow, yet the release rate is not sufficiently fast to be a toxic hazard to the surrounding environment.

Abstract: A proximity fuze detects an approaching or attacking torpedo and responds ereto by timely detonating an explosive charge that effectively destroys the torpedo when it is within a predetermined lethal range.

Abstract: An impact switch having a housing containing a rigid coaxial conductor ening one end. An inner cylindrical contact extends axially inward from and beyond the in housing end of an outer tubular contact which has a spiral spring extending axially from within a recess therein. The free end of the spring supports a mass spaced from the end of the inner contact. The contacts, spring and mass are enclosed within a flexible shroud spaced from the inner wall of the housing. The space between the shroud and housing contains an electrorheological fluid, the viscosity of which is a function of the voltage supplied by two electrodes extending through the housing and into the fluid. The voltage controlled viscosity permits control of damping of the shroud, mass, and spring movements in response to impact caused switch deceleration and control of time for switch closure and fuze delay by means of mass contact with the inner cylindrical contact, or spring contact with the outer tubular contact.

Abstract: A target simulates the coincident infrared and microwave signatures of a rce being tracked by a missile whose systems are undergoing test.

Abstract: Energetic materials exhibiting low sensitivity comprise a solid solution of nitroaliphatic oxidizer, preferably trinitroethyl derivatives, in plasticized thermoplastic elastomer such as a block copolymer of polystyrene and polyacrylate plasticized with dioctyl adipate. The energetic material is prepared by forming molten plasticized elastomer and then incrementally dissolving the oxidizer in the molten binder.