Abstract: A transparent and impervious sphere containing encapsulated within the elronics and power source for providing non-visible infrared illumination and communication in various military and non-military applications and denied-access environments. The illumination and communication light source is invisible infrared provided by light emitting diodes mounted near and equally spaced about the circumference of each of two orthogonally intersecting circular-shaped and fully encapsulated printed circuit boards. The autonomous encapsulated power source is rechargeable using an inductively coupled probe introduced to a port in the sphere. An external magnet operates encapsulated magnetic field switches to change mode of operation of the invention, including "ON", "OFF", CONTINUOUS, STROBE, and Morse modes, and to change the Morse coding.

Abstract: A breathing gas cooling and heating device. Warm breathing gas enters the it which consists of a heat exchanger mounted in an insulated shell and runs through the heat exchanger tubes. These tubes are in intimate thermal contact with micro-encapsulated phase change materials. The micro-encapsulated phase change material changes phase from solid to liquid, thereby absorbing heat at the temperature of the phase change material, and thereby cooling the gas flowing through the heat exchanger. In situations where heating of the breathing gas is desired, the gas stream absorbs heat from the phase change material. The unit is rechargeable for chilling applications after usage by placing the device in an ambient environment less than the temperature of the phase change of the material or by replacing the phase change material. It is rechargeable for heating applications by warming the device to a temperature above that of the phase change material.

Abstract: A method for air delivery of ordnance and clearing of explosive mines and stacles from a navigable sea channel includes the step of providing quantities of ordnance adapted to survive impact with land and sea and prolonged immersion in sea water and to arm in response to air flow pressure and then detonate in response to receiving a preselected signal transmitted to the ordnance from a standoff location. The method also includes the step of delivering the quantities of ordnance through the air toward multiple sites in a navigable sea channel having obstacles and explosive mines therein so as to cause arming of the quantities of ordnance followed by impact thereof with the navigable sea channel and submersion and emplacement thereof at the multiple sites in the navigable sea channel.

Abstract: A sonar array which has a resolving power which is double that of convental sonar arrays includes an array of hydrophones each having an acoustic center, a first projector positioned proximate a first endmost one of the hydrophones for launching a first sound signal during a first transmission time period, a second projector positioned proximate a second endmost one of the hydrophones for launching a second sound signal during a second transmission time period, wherein the hydrophones receive first echo signals and convert the first echo signals into first electrical echo signals during the first transmission time period, and receive second echo signals and convert the second echo signals into second electrical echo signals during the second transmission time period, and, a receiver for receiving and storing the first and second electrical echo signals, and for coherently summing the stored first and second electrical echo signals, to thereby produce a beam having a half-power beam width which is one-half tha

Abstract: A snap swivel hook assembly includes a hook subassembly having a hook body nd an elongated stem portion extending therefrom, and a swivel subassembly having a swivel collar and swivel ball seated thereon and being coupled with the elongated connector stem of the hook subassembly such that swivel subassembly can undergo concurrently rotational movement about and a limited degree of pivotal movement relative to hook subassembly. The hook subassembly also includes a hook latch release mechanism adapted to secure a latch member of the hook subassembly at a closed position relative to a cavity defined in the hook body so as to prevent pivotal movement of the latch member from the closed position to an opened position. The hook latch release mechanism also is actuatable to release the latch member from the closed position so as to permit pivotal movement thereof to the opened position.

Abstract: An apparatus for quickly and virtually complete purging of seawater from combustion chambers of an outboard engine that has been submerged or a submersible outboard engine. A poppet valve is incorporated in the combustion chamber portion of the engine head. The valve has discharge ports radially disposed around its periphery so that when the poppet valve is pneumatically operated, the ports permit the discharge of entrapped water from the combustion chamber as the engine is turned over.

Abstract: An apparatus for converting the difference frequency between the transmit lse of a sonar and the return or receive signal from a target to a video representation complementing the audio output of the sonar representing the difference frequency. The audio and complementing video signal indicate the presence of the target and its range. The invention converts the audio signal to a frequency spectrogram by means of digital signal processing including a FFT algorithm. The amplitudes of the frequency components of the audio signal are plotted on the video display of the invention. They are color-coded to indicate the amplitude of the audio signal. The frequency of the audio signal is related to the range of an object detected by the sonar. The invention is mobile and easily managed by a diver.

Abstract: A resolving power target for side-scanning sonars and other sound transming devices such as but not limited to ultrasonic devices. The target is a planar sheet having one smooth surface to which a resolution pattern is masked. An adhesive is applied to the masked pattern and articles such as gravel or other three-dimensional equivalents are introduced to produce the irregularity to the smooth surface within the confines of the resolution pattern. The resolution pattern for a particular application is selected experimentally, however, a Limansky pattern is used in the present invention for side-scanning sonar resolution measurements.

Abstract: An apparatus for performing beam pattern measurements for a side-scanning nar. The apparatus consists of a vertically mounted guide affixed to one end of a test pool and a vertically fixed mounting means affixed to the opposite end of the pool, the guide and mounting means orthogonal to each other. A carriage to which the transducer under test is attached is movably secured to travel up and down the guide. A gear motor having a takeup reel winds and unwinds an attached cable, the other end of which connects to the carriage, producing its up and town travel. The motor connects via a motor controller and position cable to a motor controller at a remote instrumentation facility. A position sensing device slaved to the carriage cable sends carriage position information to the facility for motor control. The array is secured immobile to the vertically fixed mounting means.

Abstract: A triaxial magnetic heading sensing apparatus includes nulling coils and netoresistive sensors having inputs and outputs. The nulling coils are arranged in parallel relation to three orthogonal planes intersecting at a common center point. The sensors are disposed along orthogonal axes in parallel relation to the orthogonal planes and in close proximity to the center point. Each sensor has a bridge configuration balanced in the absence of an applied external magnetic field and unbalanced in the presence one. Also, a signal generator is connected to the inputs of the sensors for exciting the sensors with a bipolar voltage waveform exhibiting alternating positive and negative voltage polarities punctuated by "off" states of zero volts.

Abstract: A mechanism for dispensing a mono-filament strand, particularly adaptable r high speed strand dispensing, has an inner guide and an outer guide shaped so as to pay out or dispense the mono-filament strand, such as a fiber optic cable, between two objects moving relative to each other or one object moving relative to the other.The inner and outer guides define cooperating surfaces of revolution, curved surfaces, and points of inflection between straight and curved surfaces that provide for strand pay out in which the strand or fiber does not contact or slide off a bobbin or over the inner guide so as to create bending stresses or angular accelerations that exceed the known physical limits of the strand or fiber material.

Abstract: A scan converter processes an input video signal having a fixed number of an lines per frame, a horizontal synchronization rate and a vertical synchronization rate on an input video line to produce an output video signal having a predetermined number of scan lines per frame and a selected number of pixels per line on a video output line. The scan converter locks to the vertical synchronization rate of the input video signal to make the output video signal have a vertical synchronization rate equal to the vertical synchronization rate of the input video signal. The output horizontal rate is determined by multiplying the vertical synchronization rate by the predetermined number of scan lines per frame in the output video signal. The input horizontal synchronization rate is multiplied by the selected number of pixels per line to produce a WRITE pointer signal for writing input picture lines into a memory.

Abstract: Process for preparing a high temperature superconductor such as yttrium bum copper oxides, by dissolving suitable proportions of hydrolyzable salts, oxides, or organometallic compounds of yttrium, barium and copper in an acid pH-controlled water-containing organic solvent such as methanol, and subjecting the resulting solution to ultrasonic energy or to an oxidation-reduction reaction, preferably while passing oxygen under a positive pressure through the solution, and precipitating a hydrolyzed precursor material. Such precursor material is then heated or annealed at temperatures between about 300.degree. C. and about 600.degree. C., also preferably in the presence of flowing oxygen, to produce the desired high temperature superconductor material.

Abstract: A homodyne radar apparatus and method for performing radar cross-section surement by maintaining the linearity and compensating for frequency drift of an FM chirp waveform produced by a YIG tuned oscillator. A digital computer uses a predetermined data look-up table of each YIG oscillator frequency characteristic in conjunction with a digital to analog converter to provide a compensating sweep signal to linearize the frequency output of the oscillator. The computer uses an analog to digital converter in conjunction with a reference circuit output to compare the actual YIG signal nulls resulting from the reference circuit to the nulls in a signal produced by a lab standard oscillator in the reference circuit to adjust start sample delay of the ADC and to correct any frequency drift evidenced by the difference in the null of the signal.

Abstract: An error compensated Mach-Zehnder Interferometer wavelength sensor integrd fiber optic chip for scale factor correction of fiber optic gyroscopes. A 90.degree. twisted optical fiber polarizer couples the light from a point in the gyroscope optical fiber circuit where light is found to have traversed the optical sensing coil of the gyroscope in both directions to the input of the fiber optic Mach-Zehnder Interferometer. The light output of the interferometer is converted to electrical signals which are used to servo lock the peak depth of phase modulation of the interferometer and provide a digital output corresponding to the wavelength change sensed by the gyroscope. Temperature and input power variations otherwise adversely affecting the gyroscope performance are thus compensated. Gyro resolution is maintained to within 1.ANG. without temperature stabilization or output conditioning over the entire temperature range of operation.

Abstract: An autonomous real-time adaptive video target detection and position locan apparatus and method. Adaptive low pass filters produce horizontal leading and trailing edge and vertical thresholds from each frame of input target and a background or clutter video signal. A user selectable input is used with the three adaptive thresholds, input video, and horizontal synchronization signal to produce a signal representing valid target detection and position information.

Abstract: An interferometric fiber optic gyroscope employing an integrated, width pshed, optic chip containing annealed proton exchange waveguides and a Mach-Zehnder interferometer for sensing a ramp induced signal from loop closing electronics to achieve a highly improved gyroscope scale factor linearity and dynamic range. An edge light emitting diode (ELED) operating at 1.3.mu. wavelength is employed as the light source in the gyroscope. A decorrelator optical fiber segment is employed between the light source and the chip, and a Lyot depolarizer optical fiber segment is employed between the chip and one side of the fiber optic coil. Also, an intermediate output of the loop closing electronics is shown to have reduced scale factor sensitivity to light source wavelength change.

Abstract: A castable, energetic, plastic-bonded explosive containing glycidyl azide lymer (GAP) an energetic polymer binder combined with the energetic plasticizers trimethyloethane trinitrate (TMETN) and trimethylene glycol dinitrate (TEGDN) or bisdinitropropyl formal and acetal mixture (BDNPF/A), and the explosive solid cyclotetramethylene tetranitramine (HMX) or cyclotrimethylene trinitramine (RDX) having the desirable mechanical properties, insensitivity, and excellent aging properties at much higher solids loading and thus explosive performance than previous compositions. The invention uniquely combines the high energy of high solids loading combined with energetic polymers and plasticizers to provide the insensitivity of rubbery explosive compositions.

Abstract: A digitally formed monopulse radar employing dynamic real-time calibration uring operation. The invention has a transmitter section, timing circuit, RF section, IF section, in-phase and quadrature section and a digital signal processor. A portion of the transmit signal is diverted from the transmitter section for preparation of calibration factors during the calibration period between receive signals. The calibration factors prepared by the digital signal processor are applied by the processor to antenna received signals during the receive mode and to produce the corrected sum and delta pitch, and delta yaw signals and the tracking errors .epsilon..sub.y and .epsilon..sub.p.

Abstract: An integrated circuit chip for application in a computer for performing h speed arithmetic operations in hardware has hardware for forming a system clock processor circuit, a timer circuit, a program counter and branching circuit; an interrupt processor circuit formed in the chip; an interrupt address random access memory, mathematical computation circuitry and an internal data random access memory. The mathematical computation circuitry includes a circuit for performing combined division and square root operations. The integrated circuit operates on a fixed instruction set and provides the means for performing instruction and operand look-ahead to permit execution of each instruction in a single clock cycle.