Abstract: A marksmanship training system is disclosed as comprising a viewing screen pon which a scenic picture having a predetermined target included therein is projected by a combination motion picture projector and film. A plurality of simulated rifles shoot laser light shots of different colors, respectively, at the target located within the image of said projected motion picture scene. A like plurality of receiver channels respond to the colors of said laser shots respectively, and as a result of being properly synchronized with said projector and film, determine and indicate the number of target "hits" for any given number of shots. A color television camera and video tape recorder monitor training exercises, and a video tape player permits the playback thereof for additional training purposes.

Abstract: Supercorroding magnesium alloys that react rapidly and predictably with seawater to produce heat and hydrogen gas. The alloys are formed by a mechanical process that bonds magnesium and noble metal powder particles together. The alloy powders can be sintered to form barstock, etc., suitable for self-contained corroding links.

Abstract: An ellipticized singlet azimuth versus elevation optimized and aperture eemized nonspherical lens antenna of very low or even minimal F-number providing balanced astigmatism for wide angle acoustic, microwave or optical applications is described. The lens has an elliptical periphery and surfaces defined by a system of nonlinear partial differential equations, the surfaces acting together to produce two perfect primary off-axis foci F and F' at a finite distance in back of the lens and two perfect conjugate off-axis foci F.sub..infin. and F'.sub..infin. in front of the lens at infinity; i.e., the lens simultaneously focuses energy from the primary foci F and F' into two off-axis parallel ray plane wave beams directed towards infinity at equal but opposite angles with respect to the lens axis. The lens may be built of various materials depending on its intended application in acoustics, microwaves or optics.

Abstract: A coupling ring is bonded onto the opposite ends of a ferroelectric stack ving substantially the same thermal expansion coefficient as the stack. A thin film of silicone compound is wiped onto the axially exposed surfaces of the rings and surfaces provided in a head and a tail mass are configured to mate with them. A plurality of microspheres are mixed uniformly through a liquid adhesive and this mixture is coated onto the suitably shaped surfaces on the head and tail mass. A stress rod reaching between the head and tail mass axially compresses the ferroelectric stack and excess adhesive mixture is squeezed from between the mating surfaces. The thickness of the liquid adhesive is restricted to the diameter of the microspheres to ensure a high impedance match and upon applying the proper amount of heat, rigid joints are set up between the now hardened adhesive and the head and tail mass.

Abstract: A free-flooding, deep submergence cylindrical magnetostrictive transducer ving a plurality of identical, coaxial, ring-shaped scrolls, surrounded by a toroidal coil, the scrolls being vibration isolated from each other and from the coil, and having ring resonance frequency sufficiently close to cavity resonance frequency for broadband operation, i.e. approximately one octave at the 6 db down points.

Abstract: An electrostatic charge generator for continually providing charge carriers f a given polarity in a flow of dielectric fluid. The charge generator comprises a coaxial tube with an inner conductor wire coaxial with a hollow, cylindrical outer conductor. A D.C. potential is applied between the inner and outer conductors of the coaxial tube and a dielectric liquid, such as oil, is caused to flow therethrough. Since the intensity of the non-uniform electric field in the conductor tube is highest near the inner conductor, the electrostatic charges of the opposite polarity as the inner conductor are removed from the dielectric fluid faster than charges of the same polarity are removed at the outer conductor. This results in the dielectric fluid exiting the conductor tube carrying a charge of the remaining polarity.

Abstract: A turbulent flow apparatus for laboratory use that provides a turbulent f field around the circumference of a cylindrical line array. The apparatus enables an evaluation of the response characteristics of the acoustic sensors in the line array to the resultant pressure field similar to the one present when the line array is towed at sea or is subject to flow. The apparatus includes a small cylindrical chamber which can be assembled around the portion of a line array under test. Water from a source is supplied at one end of the chamber through inlets and a turbulent flow is attained by the water as it comes out of the opposite end of the chamber. The portion of the array containing the hydrophones under test are placed in the water to simulate the flow environment encountered at sea.

Abstract: Conventional heat pipe performance can be improved by reducing the dependency upon the capillary pumping limitation. Electrodes mounted either in the working fluid vapor or its condensate produce an ion flow directed axially and in the same flow direction. The ion flow, through collision phenomena, picks-up the surrounding low velocity stream, increases its momentum and generates additional pumping pressure for the condensate. Performance can be improved even when low surface tension working fluids are used.

Abstract: 1. An FM doppler fuze system comprising means for transmitting a signal hng a carrier frequency modulated by a band of random noise, means for mixing the transmitted signal with a return echo signal modified by the doppler effect of the relative movement between the fuze and a target, and means for deriving an output adapted to actuate the fuze from the low frequency doppler portion of the output from said mixing means.

Abstract: An apparatus allows the testing of differently diametered optical fibers having different numerical apertures to determine their optical properties. A system of lenses and optically cooperating components permits the precise regulation of a light spot size and the adjustment of a particular numerical aperture so that equilibrium conditions at the launch end of a test fiber is created. Adjustments allow an observed variance of the spot size and numerical aperture so that the apparatus can accommodate differently sized test optic fibers.

Abstract: A protection device for a pulsed radar system which generates a random pu train whose pulse spacing is kept between a predetermined maximum and minimum. A jitter coder alters the periodic timing of the clock pulses fed to the radar modulation circuit by means of a jitter code generated by a jitter code generator. The reflected radar signals are decoded in a decoding circuit using the jitter code generated by the jitter code generator.

Abstract: A sea water pressure regulator valve is provided for a fuel tank, the valve ncluding an elongated body having a longitudinal cylindrical hole which opens into the fuel tank and a perpendicular passageway which is adapted to open the cylindrical hole to sea water. A piston is slidably mounted in the cylindrical hole with an O-ring on each side of the perpendicular passageway so as to render the movement of the piston independent of sea water pressure. The piston has a longitudinal passageway throughout its entire length so as to be open into the fuel tank at a downstream end and open into the bottom of the cylindrical hole at an upstream end. The piston has at least one aperture adjacent a perpendicular passageway for variably opening the pistons longitudinal passageway to sea water so that sea water will flow from the perpendicular passageway into the pistons longitudinal passageway and out the downstream end of the piston into the fuel tank.

Abstract: 1.

Abstract: A high intensity running light fixture capable of submersion to substantial epths includes tungsten-halogen lamps housed in glass globe sealed to a heat dissipating base. The fixture avoids reduction in light transmittance of the globe by the improvement wherein a finned heat collector is disposed in the upper regions of the globe, with fins in close proximity to the inner surface thereof, and is connected by thermally conductive pillars to the base.

Abstract: A thermodilution catheter having a distal high frequency heating coil of fine wires, heat measuring thermocouples, and a proximal resistance thermometer, all wound externally on a catheter for measuring blood flow in either the jugular vein or the left ventricle of the heart. The device also incorporates electrodes for electrocardiogram tracings.

Abstract: An attitude reference system which uses microwave radiometry to sense the orientation of a vehicle. A fundamental fact of microwave radiometry is that more natural energy emanates from the earth than from the sky. The difference in energy, which is directly proportional to temperature, can be used to estimate attitudinal position. Microwave antennas mounted on an escape vehicle, such as an aircraft ejection seat, receive energy from different directions in a base plane and from a direction perpendicular to the base plane. Vehicle orientation relative to the earth is discerned by comparing the sensed radiometric temperature received from each antenna direction, and seat guidance equipment is programmed to steer the seat in a predefined direction based upon the radiometrically sensed orientation.

Abstract: The destructive fragments used in the warhead are in a form of rods of suantially the same length as the warhead itself. Effectiveness is increased by so controlling the outward travel of the rods as to produce a propellering motion about the center of the rods capable of causing the rods to line-up end-to-end at a particular desired radius. The long rods are disposed longitudinally side-by-side in a circular path to form a continuous sleeve about a cylindrical explosive charge. Each rod also is inclined at a slight angle from the longitudinal axis of the warhead to induce the desired propellering motion. The velocity of the warhead is made uniform throughout the length of each rod to minimize tumbling.

Abstract: Means for enabling a high range resolution radar to maintain precise range nformation of a high velocity maneuvering aircraft or other target during radar operation. A voltage indicative of target motion is provided as an input to a voltage controlled oscillator that develops a waveform having a frequency that varies from the frequency of a stable reference oscillator by an amount commensurate with that voltage input. The frequency differential of the two oscillators is utilized to cause the tracking window to move in proportion to the range rate of the target.

Abstract: A system for automatically monitoring a plurality of parameters of a plurality of cells in a lead-acid storage battery system. A transponder means responsive to a frequency pattern corresponding to a digital command is located at each cell to be monitored and includes a plurality of sensors which provide analog signals having an amplitude related to the value of the parameters being monitored. In a remote scanner/display means, a microprocessor generates a digital interrogation command (containing a transponder address, sensor selection, and reply duration commands) which is converted to a frequency pattern and coupled to the transponder. In response to the command, the transponder couples the analog signal from the selected sensor to a voltage-controlled oscillator and the output of the oscillator is coupled for the selected reply duration to the scanner/display means where the frequency of the signal is determined under the control of the processor.

Abstract: A method and apparatus for treatment of tissue located in a specified reg of a mammal, the region being proximate to a gas filled cavity which is contained in a fluid medium within the mammal. The resonance frequency of the cavity is determined, and an acoustic signal having a frequency which is equal to the resonance frequency is directed upon the cavity to resonate the cavity, at a selected level of intensity, until a first phase of treatment has been concluded. Thereupon, a selected second phase in the treatment of the tissue is performed.