Abstract: A non-moving fluid thrust deflector and force augmentor is disclosed for aerodynamic and hydrodynamic vehicles and devices. When the deflector is utilized in an aerodynamic application and in conjunction with a thrust producer and a plenum, upon pressure initiation within the plenum, a jet sheet issues and remains attached to a specially designed wing having a rounded trailing edge by balancing reduced static pressure with centrifugal force, and thus provides a controlled resultant force or thrust in some direction other than that corresponding to the original flow. Upon application to hydrodynamic vehicles, the deflector is placed in the propulsor stream and provides turning or pitching forces to the vehicle without any deflection of itself. These applications require no mechanical moving components to deflect or augment the thrust or force, and thus yield considerable reductions in weight and complexity.

Abstract: A ship steering system includes a pump assembly for controlling hydraulicy actuated rudders, a first actuation unit for translating a helm steering command signal into a mechanical control signal for the pump assembly, and a second actuation unit for translating a combined helm steering command signal and ship roll reduction command signal into a mechanical control signal for the pump assembly. The second actuation unit includes an electrically activated mechanical actuator that translates the electrical helm and roll reduction command signal into a mechanical impulse that controls the operation of the pump assembly. The mechanical actuator includes a switch apparatus for switching the rudder control function from the first actuation unit to the second actuation unit when the switch apparatus and second actuation unit are activated.

Abstract: An acoustic array for use at high hydrostatic pressures comprises an acouc isolation baffle positioned adjacent to the hull; an intermediate acoustic conditioning module supported over the isolation baffle; and an outer layer containing a plurality of hydrophone units. The acoustic isolation baffle comprises alternating layers of rigid and compliant materials bonded together in sandwich fashion, wherein the compliant layer is provided with a regular pattern of air cells. In adjoining compliant layers the pattern of air cells is translated relative to each other so that the load bearing walls of one compliant layer overlap the open cell regions of the adjacent compliant layer with only a rigid layer disposed therebetween. The acoustic conditioning module comprises spaced coverplates with spacer elements extending therebetween to form a plurality of chambers which contain viscoelastic damping elements bonded to the outer coverplate.

Abstract: An inrush current limiter includes at least a two-terminal circuit in series with a power load having a high gain high current Darlington transistor, a driver transistor for the high gain high current Darlington transistor, a current sensing resistor, a base-drive resistor, and a diode bridge interfaced for providing a peak-current-limiting function by proportional adjustment of the voltage to the power load as a function of current.

Abstract: An underwater acoustic array comprises an acoustic skirt baffle positioned djacent to a hull surface for reducing the transmission of shipboard noise; an acoustic conditioning module positioned over the acoustic skirt baffle; and an outer layer secured to the acoustic conditioning module and containing a plurality of hydrophone units.The acoustic conditioning module comprises inner and outer spaced coverplates; a plurality of spacer elements extending between the coverplates to form a plurality of closed chambers therebetween; and "tuned" viscoelastic damping elements secured to the outer coverplate.

Abstract: A ship stabilization system, which utilizes the rudders to compensate for nd and wave induced roll motions, includes a hydraulically actuated mechanism for controlling the position of the rudders; a pump coupled to the hydraulic mechanism for controlling the flow of hydraulic fluid; and a flow control device connected to the pump for controlling the flow rate of fluid through the pump. The ship stabilization system also includes a first actuation device for translating helm steering command signals into control impulses for the flow control device and a second actuation device for translating helm steering command signals and roll reduction control signals into control impulses for the flow control device. A coupler is connected to the first and second actuation devices and the flow control device for disengaging the first actuation device from the flow control means when the second actuation device is activated.

Abstract: A multi-purpose mono-element airfoil is disclosed for aerodynamic and hydrodynamic vehicles and devices. The multipurpose mono-element highlift airfoil when utilized in an aerodynamic application provides a combined no-moving-parts high lift and cruise airfoil which in conjunction with a plenum, upon pressure initiation, causes pressurized air to issue from a slot tangent to the airfoil surface and remains attached to the airfoil's shaped trailing edge, providing a controlled resultant force of thrust. Upon application to hydrodynamic vehicles, the multi-purpose mono-element airfoil is placed in the freestream and provides turning or pitching forces to the vehicle without any deflection of itself or any mechanical components.

Abstract: A ship stabilization system, which utilizes the rudders to compensate for nd and wave induced roll motions, includes a hydraulically actuated mechanism for controlling the position of the rudders; a pump coupled to the hydraulic mechanism for controlling the flow of hydraulic fluid; and a flow control device connected to the pump for controlling the flow rate of fluid through the pump. The ship stabilization system also includes a first actuation device for translating helm steering command signals into control impulses for the flow control device and a second actuation device for translating helm steering command signals and roll reduction control signals into control impulses for the flow control device. A coupler is connected to the first and second actuation devices and the flow control device for disengaging the first actuation device from the flow control device when the second actuation device is activated.

Abstract: A dual dependent ejector assembly for ordnance stores on aircraft, etc. wh imparts to the store, in addition to normal ejecting forces, an angular rate of movement and/or an angular attitude. The ejecting forces are applied at fore and aft locations on the store (e.g. bomb) by piston-like ejectors which are actuated by hydraulic circuitry. Dual dependency is achieved by the action of a stepped piston which transmits equal volumes of fluid from two source chambers to each of the two ejectors. A third chamber in which the stepped piston operates supplements the fluid supplied to the ejectors by the first two chambers by means of a valve distribution system which includes two pressure responsive spool valves.

Abstract: An electrolytic gas generator comprises a housing, an end cap sealing the using and electrically insulated therefrom, an electrode assembly supported within the housing, and contact elements for transferring electrical current from the housing and the end cap to the electrode assembly. The electrode assembly includes a concentric arrangement of an inner cathode structure, an intermediate asbestos separator, and an outer anode element.

Abstract: A recirculation diffuser for centrifugal pumps that produces a continuousrising head capacity curve and at the same time reduces levels of impeller vane-frequency sound and other high level acoustic flow tones. The conventional vane diffuser in the pump casing at the periphery of the rotary impeller is modified by separating one of the side shrouds from the diffuser vanes thereby creating a recirculation flow path around the vanes from the outside high pressure to the inside low pressure side.

Abstract: A method for preparing a nonflammable insulating sheath on a metal conduc wherein the sheath does not shed, slough off, wipe off, or crack when said conductor is flexed or bent comprising the steps of adding impurities to a metal electrical conductor, zonally annealing said conductor, and rectifying said conductor metallurgically by exposing said conductor to a magnetic or electrical field. The method yields a resultant sheathing on said conductor that does not burn, smoke, smolder, yield toxic fumes or crack during bending or flexing.

Abstract: A portable oven for baking a motor or generator armature or other electrical winding mounted on a shaft for use in a process for cleaning and reinsulating the armature without removing the shaft from the operating environment. The oven is formed in the shape of a closed, hollow cylinder which encloses the armature and is supported by the armature shaft. The shaft is suspended horizontally on rotating hubs and moved longitudinally to project the armature out of the motor/generator casing. Support collars are attached to the shaft on either side of the armature. Wedge-shaped sections are attached to the collars to form circular ends of the cylindrical oven. Arcuate-shaped body members are attached between the ends to enclose a cylindrical surface. Each body member is furnished with heaters and perforated baffles for evenly heating the armature. An air inlet is formed in one of the wedge-shaped end sections and an air outlet is formed in one of the arcuate-shaped body members.

Abstract: An antifouling coating for application to submerged surfaces comprises, by eight percent, from about 3-5% fumed silica, from about 60-70% silicone oil, from about 20-30% antifoulant, and from about 0.5-2.0% surfactant.

Abstract: A method for preparing a resistive screen for underwater sound absorption consisting of a metallic honeycomb structure, adding a thermosetting plastic material to the cells within said structure, heating said structure under pressure and forming small apertures within said thermosetting plastic material.

Abstract: A streamlined fairing comprises an elongated leading edge tension member, elongated trailing edge member of flexible material integrally bonded to the leading edge member, and a flange member secured to the leading and trailing members for preventing relative displacements therebetween and for improving the shape stability of the fairing. The flange member has a cross-sectional width which is between about 10% and about 50% of the maximum width of the fairing and a cross-sectional length which is between about 5% and about 20% of the chord length of the fairing.

Abstract: A damping assembly for reducing wind-induced vibrations in elongated strures comprises a plurality of damping tubes suspended within the structure in end-to-end relationship so that the end portions of the damping tubes are disposed in abutting relationship with the inner surface of the structure. Each damping tube includes an elongated shell, vibration damping material such as sand filling the shell, and plug elements sealing the end portions of the shell. Rod elements are secured to the plugs to interconnect the damping tubes. In an alternative arrangement spacer elements are connected to the rods so that the damping tubes are supported at their end portions in an aligned relationship.

Abstract: A method for fabricating superior ohmic contacts in a III-V semiconductor wafer by virtue of double donor (or double acceptor) impurity complex formation. A typical III-V, e.g., GaAs, semiconductor device is fabricated by depositing a thin Si.sub.3 N.sub.4 layer and then regions are opened, by photoresist methods, upon which ohmic contacts are to be made. New resist is applied over the wafer and the ohmic contact regions are again opened. Si ions are now implanted to form the active channel and the drain and source regions (in an FET device). The resist layer is removed, a layer of Ge is laid down and a layer of Se over the Ge. The Ge layer is coated with a layer of SiO.sub.2, Si.sub.3 N.sub.4 or a mixture of both, and annealed, causing the Ge and Se to diffuse rapidly into the Si ion implant region. The SiO.sub.2, Si.sub.3 N.sub.4 and excess surface Ge and Se is now removed.

Abstract: An antifouling coating composition includes an antifouling compound formed f the esterification product of tributyltin oxide combined with the copolymer of styrene and maleic anhydride. The antifouling compound is combined with a blend of selected Bisphenol A epoxy and polyacrylate resins, solvent, fillers, pigment, and amine based curing agent to provide a durable marine coating which exhibits controlled leaching of antifoulant.

Abstract: A pressure-responsive valve operable to close when the pressure falls below predetermined minimum level. After closure, the valve must be manually reset to its open position where it is retained by the pressure of the fluid against a diaphragm positioned within a chamber adjacent the valve. When used in conjunction with a oil-fired boiler, the valve prevents boiler flareback by closing when the pressure falls below a predetermined minimum level and by requiring a monitored, manual reopening, thereby preventing undesired ignition.