Abstract: An apparatus for measuring the length of fiber optic cable being deployed om a winch to an underwater environment. The cable deployment measuring apparatus of the present invention comprises a constant current generator for generating a direct current, a resistor array having a plurality of series connected resistors and a plurality of trip wires with one of the trip wires being connected across each of the resistors. The trip wires which function as short circuits are also attached to the cable at predetermined locations along the length of the cable. When the fiber optic cable is being deployed, each trip wire will break when the location at which the trip wire is positioned is unwound from the winch for deployment in the underwater environment. This, in turn, will cause flow through the resistor array with a resulting voltage drop across the array.

Abstract: A rapid reprogramming terminal (RRT) adapted for communication with military aircraft MIL-STD-1553 multiplex data bus which includes generally four avionics and one electronic warfare bus on board each aircraft. The RRT may be used to reprogram all electronic warfare and avionics systems aboard and aircraft including the bus controllers for each avionics or electronic warfare bus and the remote terminals connected to each bus. The RRT includes a high speed digital signal processor which executes functions required to reprogram a remote terminal or bus controller through software stored in an electrically erasable programmable read only memory (EEPROM). The information required to reprogram a remote terminal or bus controller is stored on an IC memory card which is electrically coupled to the digital signal processor.

Abstract: Coumarin dyes such as alkylaminocoumarincarboxamides which have functional hydroxyl groups or which are chemically attached to vinyl monomers such as methacrylic acid. The dyes which are chemically attached to vinyl monomers can be copolymerized, e.g. with acrylic monomers to produce a coumarin dye-containing polymer. The dyes which have functional hydroxyl groups can be reacted with an existing polymer or copolymer, e.g. a copolymer of styrene and acrylic acid to esterify the acid groups of the polymer to form a coumarin dye-containing polymer. Such coumarin dye-containing polymers are formed into films and fibers which when poled in an electric field yield a film or fiber with nonlinear optical properties.

Abstract: An integral pressure sensor for a pressurized vessel, including a housing, a core element, a seal and a spring. This combination is disposed on the interior of the pressurized vessel. The core element is preferably a magnetic element or a steel ball which moves in the housing under the effect of the vessel pressure, and the chamber or housing pressure. The spring and seal combination together with the core element, function to trap a specified volume of the pressurized medium in the chamber when the vessel is initially pressurized. When the pressurized vessel leaks, the trapped pressure within the chamber exceeds the vessel pressure thereby causing the core element to move. The position or presence of the core element is detected using a detecting device such as a Hall-effect device or another magnetic device.

Abstract: A commercially viable method of making disilacyclohexadiene polymers with surpassed thermal stability is made possible by using the dialkali metal salt of the diol of disilacyclohexadiene as the starting material for polymerization. The structure of the new alkali metal compound and a method of preparing it are disclosed. Uses for the new compound are also described.

Abstract: Tri-isopropylantimony is used as a source of antimony in chemical vapor deposition production of semiconductor materials. The process can be used to introduce antimony as a dopant into III/V and II/VI semiconductor materials.

Abstract: A telemetry word selector and processor device having several digital-to-analog converters (DAC's) receives successive data words each accompanied by a tag word identifying a parameter set in the data word. The device has a tag memory storing, for each possible tag word, a DAC select word having a bit for each DAC and has a bit map memory storing for each DAC a word having a field for each DAC input bit. Each field can address any bit of a data word and has a control bit determining whether the bit is to be unchanged, zeroed, or inverted. The tag memory is addressed by the tag word to output the corresponding word to select DAC's to receive data. The map memory words are output successively, and each field selects a data word bit, as affected by the control bit, for a DAC input word. This word is output to the DAC corresponding to each map memory word if the DAC is selected by the addressed tag memory word.

Abstract: A chemical coating consisting of a mixture of tetraethoxysilane (TEOS), AC.sub.4 H.sub.9).sub.3, LiOH, Ti(OC.sub.3 H.sub.7).sub.4, Zr( ).sub.2 C.sub.5 H.sub.7).sub.4, HNO.sub.3 for pH control, and glycerol which produces an environmentally protective barrier resistant to cracking or crazing to a glass fiber to which it is applied by the SOL-GEL process.

Abstract: A zero-time-delay video processor circuit includes reduction circuitry for eceiving a digital image input and providing a reduced and Nyquist acceptable digital image output signal. A controlled write/read memory connected to the reduction circuitry provides the digital image output. A digital estimator is connected to the reduction circuitry for providing an estimated gain signal. A gain corrector circuit is connected to the controlled write/read memory for compensating for errors in the estimated gain. A signal indicative of the true or required gain is provided to the digital estimator and to the gain corrector.

Abstract: A AC to DC power converter unit includes an AC/DC converter section operable to convert an AC input into a plurality of unregulated internal DC outputs and a pair of positive and negative switching DC/DC converter sections connected to said AC/DC converter section and receiving a pair of positive and negative unregulated internal DC outputs therefrom being of a first voltage level and generating a pair of dual positive and negative regulated external DC outputs being of a second voltage level different from said first voltage level.

Abstract: A safe and arm device has a cylindrical body from which a plurality of exsive leads diverge from a rotor movable through an arming angle to electrically and mechanically arm a plurality of detonators and has a rotary solenoid with a shaft oscillating a predetermined number of times when the device is to assume an armed condition. The device has an axle extending alongside the shaft, and a setback weight is mounted on and helically coupled to the axle to motivate the axle through an angle actuating the rotor through the arming angle. The shaft bears an arcuate pawl having recesses, and the axle bears an arcuate cam having recesses juxtapositioned to the pawl. Latch balls are mounted in the body between the pawl and cam for movement partially into and from the recesses.

Abstract: The disclosed invention is a regulated drag area parachute for decelerating manned ejection seat or an ejectable capsule at a low altitude from an aircraft or other air vehicle. This parachute comprises a canopy composed of two portions, suspension lines, and a means for controlling the inflation of the canopy so that the two portions of the canopy inflate independently from one another. This means for controlling the inflation of the canopy provides a manner to regulate the rate of inflation of the lower portion of the canopy. Thus, the invention allows the top, or apex portion of the canopy, to inflate rapidly while the remaining portion of the canopy can be inflated subsequently and in a controlled manner so that the effective drag area of the canopy can be regulated during the deployment of the parachute.

Abstract: The present invention discloses new polymers which can assume an accordion-like conformation of the backbone. These polymers are prepared by the copolymerization of two difuntional, chemically precoupled precursors to chromophoric units. The resulting polymers have a head-to-head, tail-to-tail topology (a syndioregic arrangement of rigid units along the polymer backbone), and the molecular units are designed to fold into an "accordion" conformation. This useful microstructure (a three-dimensional conformation) forms spontaneously (self-assembles); or, it can be brought about by field-assisted processing. Films and fibers of these polymers have useful second-order nonlinear optical properties, and may be used for the modulation and switching of optical communications signals.

Abstract: A video signal filtering circuit and method includes the operative steps of eceiving unfiltered high-state and low-state components of a video signal being substantially equally injected with electromagnetic noise, subtracting the unfiltered high-state and low-state components of the video signal one from the other so as to thereby produce a first signal having a DC offset component and an AC data-containing component free of noise, removing the DC offset component from the first signal and passing the noise-free AC data-containing component, clamping the first signal to a preset DC reference level corresponding to a specified sync level of a standard video signal so as to thereby produce a second signal having the AC data-containing component free of noise and being clamped to the preset DC reference level, and isolating the second signal from external electronic disturbances so as to produce a noise-free AC data-containing reference level-clamped output signal for providing a filtered high-state component h

Abstract: The disclosed invention is a generic Drone Control System or alternatively method to remotely pilot an air vehicle. The present invention essentially comprises a converted aircraft or other air vehicle and a ground station from where the drone is remotely controlled. Also disclosed as part of the Drone Control System are a plurality of means to transfer information and data between the ground station and the drone.

Abstract: A system for distinguishing between a target and clutter analyzes frequency components of returned wave energy by one or more networks each having inputs receiving successive samples of the returned energy and having outputs individually connected to the inputs through multiplier elements providing selectable factors. The multipliers corresponding to each output are connected to the output through a summing element and a selectable and generally sigmoidal activation function. The factors may be bandpass filter coefficients or discrete Fourier transform coefficients so as to generate frequency components of the energy. Predetermined frequency characteristics of the returned energy may be detected by providing the outputs of a network to a network in which the factors are selected as correlation or convolution coefficients, are selected to integrate fed back outputs, or are selected to sum several outputs within a predetermined range.

Abstract: Synchronization of remotely originating video signals to a standardized fuency is assured on a field-by-field basis. The video signals are digitized, multiplexed and stored in fields in accordance with their horizontal and vertical sync signals. A reading out of storage, demultiplexing and reconversion to video signals at the standardized frequency on a field-by-field basis allows a real time presentation to standard equipments at a standardize rates.

Abstract: A method for distinguishing between a target and clutter analyzes frequency components of returned wave energy to detect target energy characterized by being present in a narrow range of frequencies, by increasing in the range over time, or by remaining substantially in the range over time. The method utilizes time sequential spectra of the returned energy. The spectra may be signals from a plurality of band pass filters or may be a spectrogram. The energy in adjacent band pass signals and spectra frequencies are correlated to detect energy in a narrow range of frequencies. Differences in successive spectra are integrated to detect increasing energy in a range of frequencies. An energy peak detected in a narrow range by correlation is integrated to detect that the peak remains in the range.

Abstract: Comb-shaped polymers, comprised of hydrophilic backbones and dye-containi hydrophobic side chains are fabricated into multilayered, polarized, noncentrosymmetric, thin films by means of Langmuir-Blodgett processing techniques. These films exhibit harmonic, generated by shining a laser through the film, increases quadratically with the number of layers of polymeric dye in the film.

Abstract: An electro-rheological fluid damped actuator having an actuator housing w a moveable element such as a piston and rod assembly disposed within the housing. The actuator further comprises a hydraulic circuit with an electro-rheological fluid disposed in the hydraulic circuit. The hydraulic circuit and rheological fluid provides an active and variable damping force on the moveable element. The damping force is controlled by the output of an electrical circuit which creates an electric field within the hydraulic circuit. The electric field will cause the viscosity of the electro-rheological fluid which is exposed to the electric field to increase or decrease in accordance with the magnitude of the electric field. The increase in viscosity of the electro-rheological fluid as it flows through the actuator provides an active damping force on the actuator which allows a more precise control of the output motions of the actuator.