Abstract: A process of applying catalyzed resin through a vacuum bag onto a dry hand lay-up uses at least one resin reservoir with a valve nozzle thereon. The valve nozzle is placed between the lay-up and the vacuum bag. By lifting the resin reservoir connected to the valve nozzle, the catalyzed resin placed in the reservoir will be sucked by vacuum onto the laminate. The lowering of the resin reservoir stops the flow. The vacuum bag between the valve nozzle and the reservoir connector must be broken first to allow an open channel to the valve nozzle outlet.

Abstract: A conformal telemetry package comprises a complete system including sensors, data acquisition components, a controller, RF transmitter, antenna and battery. The package is approximate 0.1 inch thick and is flexible and capable of conformable mounting to a curved surface. This package includes a printed circuit antenna such as a microstrip patch antenna. The bottom of the package is coated with an adhesive permitting the system to be mounted on surfaces such as the leading edge of an air foil. The package is kept thin and flexible by using multiple layers of flexible dielectric such as Teflon and extremely high levels of circuit integration.

Abstract: An aqueous composition for treating fibers for use in the resin transfer/injection molding of high density continuous fiber preforms which comprises about 0.005 to 0.05 php wetting agent, about 0.05 to 0.25 php binder, about 0.10 to 1.00 php polymer, about 0.005 to 0.05 php plasticizer and about 0.05 to 0.25 php water soluble oil, balance water, wherein the term "php" is intended to mean parts per 100 parts water (w/w). This composition, when applied to fibers, allows high fiber tension to be applied during preform fabrication without causing damage due to mechanical abrasion of the fibers. The composition also promotes resin to fiber adhesion and speeds the flow of resin through the dense preform during resin injection/transfer molding.

Abstract: An improved radar retro-reflector providing overlapping coverage at low angles of elevation comprises a plurality of three-corner retro-reflectors made of electromagnetically reflective material lying in three planes which intersect each other at right angles. The individual retro-reflectors are supported between a horizontal base and a platform mounted above the base, and are interconnected to each other and to the base and to the platform in a geodesic configuration. Additional three-corner reflectors may be mounted atop the platform in back-to-back configuration. The radar retro-reflector may be foldable into a compact generally flattened storage position by making the device out of a plurality of hingedly connected triangular panels controlled by a hydraulic or other actuating system.

Abstract: The variable speed, reversible, brushless, direct current motor comprises a rotor, electromagnets a switching transistor module and electronic controller module. The rotor is mounted on a shaft with bearings at each end, with a plurality of permanent magnets symmetrically placed thereon in an alternating field pattern. Each electromagnet invokes a magnetic field at two permanent magnet positions to cause rotation of the rotor. The switching transistor module receives power from two power sources to conduct current and energize the electromagnets. The electronic control module supplies alternating voltage to points on the transistor module. The switching waveform is triggered by infra-red pick-ups mounted next to the rotor. In operation, each time an electromagnet is switched in polarity, the rotor rotates thirty-six degrees until the permanent magnets are aligned with the electromagnet.

Abstract: An improved fighter aircraft has three primary lifting surfaces acting as wings on the airframe. The lifting surfaces are attached 120 degrees apart on the airframe so the fighter may turn in any direction without prior movements. The pilot has means to position himself to feel only positive g's in these maneuvers. A rotatable cockpit section, for example, moves independent of the airframe with the canard wings thereon. The pilot flies the cockpit section and the airframe with wings thereon responds accordingly.

Abstract: There is provided a primary cell having an anode material, an electrolyte material and a cathode material, wherein the cathode material, in the pre-discharge condition thereof, is Na.sub.6 V.sub.10 O.sub.28. In one aspect, the invention comprises a thermal cell having a lithium metal or lithium alloy anode, an electrolyte material comprising at least one lithium salt and the aforementioned cathode material. In another aspect, the invention comprises an improved conventional room or ambient temperature cell having a lithium anode, a nonaqueous electrolyte and the aforementioned cathode material.

Abstract: A method and apparatus for making aromatic heterocyclic polymeric fibers having enhanced compressive strength are disclosed. Individual polymeric fibers, while being made according to otherwise conventional methods, are full twisted as they are drawn from a spinnerette hole so that their internal fibrils and microfibrils become entangled. The twisting is performed before coagulation of the fibers. The entangled fibrils and microfibrils are believed to provide mutual support to adjacent fibrils/microfibrils to resist buckling under compression.

Abstract: Rigid-rod aromatic heterocyclic copolymers having repeating units of the formula: ##STR1## wherein n has a value of about 0.10 to 0.99, m is 1.0-n, Ar is a para-ordered divalent aromatic moiety, as defined hereinafter, and wherein Ba is a benzobisazole moiety of the formula: ##STR2## wherein X is --O--, --S-- or --NH. Ar can be any para-ordered divalent moiety such as, for example, 1,4-phenylene, 4,4'-biphenylene, 4,4"-terphenylene, and the like, as well as substituted divalent moieties, such as, for example: ##STR3## wherein R is Q or an alkyl group having 1 to 4 carbon atoms, wherein Q is ##STR4## wherein Z is --O-- or --S--; ##STR5## wherein R is as defined above, or ##STR6## wherein R.sup.1 and R.sup.3 are --H or -phenyl, R.sup.2 is --H or ##STR7## wherein Q is as defined above, and R.sup.4 is R.sup.

Abstract: A controlled fuel flow system from variable flow solid fuel gas generator to secondary combustor is provided, which system includes a hot gas valve which is operated by an electronic controller. The valve is mounted between the gas generator and the secondary combustor, which valve has in the throat thereof a pivotable blade that moves to relatively blocking and unblocking positions therein and a nozzle downstream of such blade which communicates with the secondary combustor. A first pressure transducer is mounted in the gas generator and a second pressure transducer is mounted downstream of such blade near or in the nozzle. Actuator means are also provided to pivot such blade between relatively blocked and unblocked settings as guided by electronic gas flow controller logic. The secondary combustor has one or more air ducts therein and the above system is mounted, e.g., in a variable flow ducted rocket.

Abstract: An optical mirror is kinematically mounted at its sides on one fixed point and two movable points which points are supported by a frame spaced from the mirror. One of the movable points is a ball on a cantilevered arm which rests in a cone or groove in the mirror, the other movable point is a mechanical flexure prelaod mounting or a pneumatic preload mounting, which mountings serve to apply constant preload to such mirror. The mirror is made of ceramic material, of low thermal expansion or contraction and has water cooling passages therein. The frame is made of metal of higher thermal expansion or contraction. However such mirors, when reflecting a high intensity laser beam can thermally expand relative to the frame and must do so with minimal deformation from the desired optical contour thereof which result is accomplished by the resilient and constant preload mountings of the present invention.

Abstract: A high voltage electrochemical cell is provided which includes an active metal as anode, such as sodium, a mixture of a transition metal halide or sulfide, e.g. CuCl.sub.2 and graphite as the cathode and an electrolyte of a room temperature chloroaluminate molten salt such as MEIC-AlCl.sub.3 buffered to Lewis acid-base neutrality by an excess of metal halide, such as NaCl, to provide a discharge potential or open-circuit voltage of up to 2.78 V or more. The battery cell of the present invention is believed the first to use sodium as an active metal anode in a room temperature, molten salt electrolyte. The battery cell of the present invention is useful for long-life, low drain applications, e.g. remote sensors and surveillance equipment.

Abstract: A circular light emitting filament is positioned adjacent an annular light blocking lip extending from a bowl-shaped reflector. A substantially conical reflector portion extends from the cancer of the reflector and has an apex coincident with the lamp projection axis. The result is that all of the light is reflected before being projected from the lamp and good light intensity uniformity is attained at the illuminated scene.

Abstract: High total transmission, tunable comb filter structures are described which comprise moderately thick layers of optical material having periodic or multiply periodic refractive index modulation features comprising a multiplicity of coherently-coupled, weakly-resonant optical cavities, resulting in and characterized by spectra of high order (5 or higher) relative to a fundamental (lowest order) cavity resonance, consisting of narrow, moderate to high density reflection lines occurring in one or more sets, each set being characterized by lines equally spaced by wave number if optical dispersion is neglected. Filters of the invention can be structured to be tuned, electro-optically or mechanically such that the peaks within a spectral band of interest shift by one harmonic order and/or from one peak position to the next, to reflect or transmit light of any specific wavelength within a band.

Abstract: System and method for low temperature treatment of organic wastes containing potentially toxic concentrations of metals is described which comprises forming the waste material into pellets of preselected size, mixing the pellets with inert material, incrementally heating the mixture in air from about 200.degree. C. to about 600.degree. C. in order to oxidize the pellets to the corresponding ash containing the metals, collecting the ash, and combining the ash with inert material and binder to form a solidified compact for disposal.

Abstract: There is provided a primary cell having an anode material, an electrolyte material and a cathode material, wherein the cathode material, in the pre-discharge condition thereof, is Na.sub.3 PMoW.sub.11 O.sub.40. In one aspect, the invention comprises a thermal cell having a lithium metal or lithium alloy anode, an electrolyte material comprising at least one lithium salt and the aforementioned cathode material. In another aspect, the invention comprises an improved conventional room or ambient temperature cell having a lithium anode, a nonaqueous electrolyte and the aforementioned cathode material.

Abstract: Multibeam coupling in a Kerr medium of nonlinear characteristics and finite response time is disclosed together with two different frequency spectrum examples of its use. In the first spectrum example, the modes are equally spaced and in the second spectrum the frequency separations are all unequal. In either case, as the beams propagate, both input spectra eventually reach a saturation characterized by a cascading of energy into the lowest frequency if the Kerr constant is positive. The direction of cascading of energy transfer is reversed to the highest frequency if the Kerr constant is negative. The examples disclosed include a typical Kerr medium and are representative of a multimode, equally spaced laser source and an unequally spaced source. For the equally spaced case, the optimum medium response time for conversion of Gaussian spectra is disclosed. If the frequencies are unequally spaced general conditions to be satisfied are disclosed, along with examples.

Abstract: A digital phase shift apparatus having a pair of single gate FETs which are connected in a common source configuration. Transmission line segments which respectively connect the sources and drains of the FET pair, provides a phase shift to an applied RF signal. The operating FET provides signal gain as well as switch the signal path length.

Abstract: An aircraft arresting system providing a controlled, gradual aircraft deceleration is disclosed. The system includes an arresting barrier comprised of a triggering net/parachute combination. The triggering net is aligned transversely to the runway and is actuated by contact with the aircraft nose landing gear. An engaging cable, releasably retained on the triggering net, is then thrust upwardly to entangle the aircraft main landing gear. A pair of parachutes, attached to the engaging cable, are deployed as a result of the continued aircraft motion. Once deployed, the parachutes provide the desired gradual decelerative force to slow the aircraft. The preferred embodiment of the aircraft arresting system includes three arresting barriers spaced a distance longitudinally on the runway to provide a reliable aircraft engagement and a controlled rate of arrest.

Abstract: A method for electroplating sliver is described which comprises a plating and/or stripping solution of an alkali hydroxide and ethylenediamine having a basic pH in the range of about 7.5 to 13, and having an ethylenediamine concentration of about 5 to 33% by volume, the electroplating (at the cathode) and/or stripping (at the anode) being performed with an applied DC potential across the electrodes of about 2 to 6 volts.