Abstract: A vortex ring is used to produce a flow of fluid through a flexible tube, to remove surface deposits from a surface, and to transfer heat from a platen to a ring vortex. In pumping a fluid through a flexible conduit or tube, a vortex ring is launched along the tube so that the vortex ring encircles the tube. The vortex ring compresses and expands the flexible tube utilizing a high circumferential pressure formed at the bow of the vortex ring and a low pressure at the wake of the vortex ring. In removing deposits from a surface, a vortex ring launched along the surface mechanically abrades the surface and fractures the adhesion bonds of the surface deposits. In transferring heat from a heated surface to a vortex ring, the vortex ring removes the heat from the surface of the heated platen by forced convection.

Abstract: Several methods are presented for extracting useful work from a ring-vortex moving at high angular and axial velocities. The key components are a ring-vortex generator or launcher, a platen that penetrates the ring-vortex centroid along the axis of revolution, and a collector. Typical applications that utilize different parameters of a ring-vortex include a pump, filter, and heat exchanger.

Abstract: A projectile with an Air Pressure Wave Generator, a battery, fuze, safe and arm system, detonator system, and ancillary circuitry. The Air Pressure Wave Generator contains a supersonic or subsonic nozzle, an ogive, and a secondary propellant chamber, which contains a conventional high explosive and is consistent with the “form-fit” of the weapon rifling system, and designed so as to produce the desired Air Pressure Wave impulse on the target. The projectile also has chemical agent(s) and marker(s) inside the secondary propellant chamber, and/or inside the Air Pressure Wave Generator section that is located intermediate between the nozzle and projectile housing. The types and amounts of chemical agent(s) and marker(s) are consistent with the Air Pressure Wave Generator design to entrap the chemical agent(s) and marker(s) in the core or central section of the APW packet.

Abstract: A method and system for extending the life cycle of an circuit including the positioning of a circuit on an an elevated pedestal in a container, filling the container with a hydrophobic fluid sufficiently to form a bubble at the top of the package, and sealing the package. On the contamination of the container by a condensate, the pedestal segregates the circuit from the condensate regardless of the containers orientation.

Abstract: A method for detecting in a human test subject the presence of a harmful level of a chemical-biological agent, the method including the steps of administering a given dose of a predetermined chemical-biological agent to a control subject; extracting control EMG signals from the control subject; processing the control EMG signals to determine given parameters thereof; and storing data obtained in the processing step. The above steps are repeated for a plurality of other control subjects and the resultant data are used to determine the given dose of the predetermined chemical-biological agent a standard range of the given parameters. All of the above steps are repeated with each of a plurality of different sized chemical-biological doses of the predetermined chemical-biological agent and all resultant data are used to determine a normative range of the given parameters for each of the plurality of different sized chemical-biological doses.

Abstract: A fluxless soldering method utilizing a strongly internally bonded fluorine containing gas such as hydrogen fluoride (HF). The solder surface is exposed to the gas in place of a flux treatment, resulting in a modified surface layer which allows reflow or joining for an extended period.

Abstract: A solder composition and method of soldering using composite solders comprising a solder alloy and intermetallic filler particles. The intermetallic filler particles are lead-free, have high strength, wet and disperse well in solder joints, remain uniformly distributed and resist degradation on long-term aging. When added to commercial bulk or paste solders, the intermetallic particles reduce the lead content of solder joints by consuming volume in lead-tin solder, and improve the mechanical properties of the solder by inhibiting localized shear deformation and interfering with crack growth.

Abstract: A methods for gauging the solderability of printed circuit boards or printed wiring boards using differential reflectometry techniques. The method facilitates the determination of solderability properties of a substrate in a non-destructive manner.

Abstract: An inertial impact switch is provided having a housing which comprises two onductive sections electrically insulated from each other and a movable contact member engaging one section and held out of contact with the second section by means of a concentric insulating member. Interior radial "fingers" of the insulator bend in response to the spin forces of the projectile containing the switch. To provide for this sensitivity, the fingers of the insulator may have varying stiffness to provide deflection under differing spin conditions. The body of the switch may also be provided with a single grove bellows that is compressible under applied stress prior to use, moving the first section of the housing closer to the second section of the housing, thus reducing the gap between terminals.

Abstract: In combination with a plastic fuze radome, a structure for protecting the ternal electronic components housed within said radomes during flight, said structure being a strap-on metal cap designed to slip on or over the ogive of the radome of a fuze. This metal cap is a metal cone having two open windows. The antenna of the fuze electronics is permitted to radiate through the windows while being protected from rain damage by the large umbrella at the top over the plastic nose cone, and from heat flux into electronic components by the large metal band at the bottom. Mechanical ablation of the tip is prevented by the cone of metal acting as a heat sink and as a shield against the wind-stream stagnation pressure. Triboelectric charging is prevented by two conductive straps down the side of the structure, and by a grounding electrical connection.

Abstract: Disclosed is a flight simulator for missiles. The system comprises means for directing heat toward the nose cone of a missile while simultaneously imparting axial rotation to the missile. Both the heat and the axial rotation are programmed to conform to actual inflight heat and spin conditions and the cycle of simultaneous heat and rotation is programmed to conform to such inflight conditions. Means are also provided for monitoring the proper fuse function at any given time during the simulated flight and for recording the entire cycle of simulated flight. The programmer can be programmed for the full real flight time of a missile such that the time-speed relationship can be matched to that of any real or proposed flight.