Abstract: This disclosure is for a liner for the exit nozzle of a gas turbine engine. The liner is double walled liner with insulation material between the walls, and with a plurality of tubes extending through the walls and the insulation. Primary cooling is accomplished by film cooling through the tubes. During periods of low coolant medium flow, the liner provides a barrier against radiation and convection. The use of the insulating material allows both walls of the liner to carry the pressure loads.

Abstract: A variable interval electromagnetic pulse train generator having a semiconductor substrate on which is mounted on one surface thereof a plurality of spaced apart electrodes and on another surface thereof an electrode base plate. A voltage source is connected to each of the plurality of spaced apart electrodes while the space between electrodes have optical pulses directed thereon. By controlling the voltage applied to the electrodes and the optical pulses directed between electrodes the pulse train generator is capable of emitting a series of variable, spaced apart electromagnetic pulses.

Abstract: An array of skewed cooling air conduits are embedded within a ceramic turbine blade for cooling an upper blade surface by producing a cool air film thereon, and by removing heat through conduction. The conduits provide a large bonding surface area in the ceramic, and are recessed to prevent clogging by the ceramic and to prevent direct contact with the hot gas stream at the upper blade surface.

Abstract: An electrical socket cover is disclosed in a system which includes a pair of connector elements which may be electrically engaged, and a cover for protection of a first connector element when the first and second connector elements are disengaged. The first connector element is mounted on a vertical wall of an enclosure, while the second connector element which comprises an electronic module is movable longitudinally within the enclosure between a first, engaged position and a second, disengaged position.

Abstract: A pointer/tracker system is disclosed for use with an array of laser telescopes. This pointer/tracker system uses one telescope as a reference and causes all others in the system to "track" the reference. The common element concept is maintained by a synthetic approach. Each tilt detector in the system has its own XY coordinate system relative to the detector orientation. Provisions were made in the Pointer/Tracker to align each independent coordinate system to the reference coordinate system. The technique used to accomplish this is allowing cross coupling of the XY coordinates to match that the reference.

Abstract: A modified 2f Fourier transform optical correlator combines a collimation and first Fourier Transform lens into one thin lens. The resulting correlator thus utilizes one less lens relative to the unmodified 2f optical correlator.

Abstract: A TTL to CML input buffer and conversion apparatus having a Schmitt trigger to receive a TTL logic signal and apply the logic signal levels to a CML gate unit. The logic levels of the TTL signal are converted by the CML gate unit into CML logic signals.

Abstract: A digital position monitor is disclosed which is used to output an X and Y position of a laser beam on a quadrant or lateral effect detector. The device includes two high speed microprocessors to perform either a quad cell or lateral effect algorithm in the open loop mode. In the closed loop operation, in addition to the algorithm, a digital filter is also executed. The decision to open or close the tilt loops is made by a central processor or by an external input to the central processor. Each microprocessor is designed to perform either the X or Y function. In brief, the operation is as follows: a detector senses the position error and provides a signal to analog circuits. The output from the analog circuits is applied in parallel to the circuits of the X and Y channels. Both channels comprise an analog-to-digital converter, a microprocessor and a digital-to-analog converter connected in series. Each channel provides an X or Y output.

Abstract: A liquid droplet radiation centrifugal collector apparatus utilizing a conical-shaped collector with a deflector at its apex to direct a received droplet stream to a trough that is formed within the leading edge of the collector. The collector which is rotating imparts a dynamic pressure to the fluid that is accumulated in the trough. The fluid is intercepted by pitot tubes which are stationary, and is directed to a high pressure pump for return to the power generating system.

Abstract: A frequency diversity receiver system operating over a predetermined bandwidth comprising a first mixer receiving two identical information signals widely separated in frequency, a stepping oscillator with a predetermined number of steps controlling the output frequency of said mixer, two frequency channels at the output of said mixer, the first of said channels having a broad bandwidth filter and the second having a narrow bandwidth filter, a second mixer receiving simultaneously the output of said second filter and the output signal of a sweeping oscillator, said sweeping oscillator having a preselected sweep, means to synchronize said sweeping oscillator and said stepping oscillator, a multiplier simultaneously receiving the output signals from said first filter and said second mixer, a bank of parallel filters and associated detectors receiving the output signals from said multiplier, each of said filters of said bank having a predetermined bandwidth.

Abstract: This invention comprises a new group of fiber optic switching devices that use layers of surface-established ferroelectric liquid crystals (FLCs) as the switching media. In each of the devices light impinges upon the ferroelectric liquid crystal a an angle of 90 degrees (normal incidence) with the surface plane. Each FLC gives 0 degrees or 90 degree optical rotation, depending upon the polarity of the electric voltage applied. A series of polarizing beam splitters are used to separate unpolarized light into its s and P polarization components. After ferroelectric liquid crystal switching, other polarizing beam splitters are used to direct the s and p light to output optical paths. The switches discussed include voltage controlled 2.times.2, 1.times.4, 1.times.6, 1.times.8, 4.times.4 and dual plane devices that use one or more layers of surface stabilized ferroelectric liquid crystals to direct optical signals.

Abstract: The invention comprises an aircraft ground collision avoidance system which utilizes a flight control computer for monitoring aircraft flight states and calculating preferred aircraft flyup altitudes at which automatic aircraft flyups should be initiated. The flyup altitude is determined by calculating aircraft altitude to be lost during a recovery maneuver from a current aircraft flight state. The invention also comprises an aircraft autopilot for monitoring aircraft flight states and initiating an automatic aircraft flyup when so directed by the flight control computer. The monitored aircraft states include aircraft airspeed, angle of attack, bank angle and velocity. Sensor lag, aircraft load factor and engine throttle position are also considered in determining when to conduct an automatic aircraft flyup.

Abstract: Sidelobe jamming in dual diversity troposcatter link receivers is effectively suppressed by providing an auxilliary low power antenna, the output of which is differenced from the high power main antenna signals prior to processing in the receivers's dual diversity demodulator. The auxilliary antenna power is substantially equal to the sidelobe power of the main antennas. The auxilliary antenna receives jamming power that is comparable to the jamming power received by the main antennas. However, it receives much lower desired signal power. Differencing of the signals therefore, cancels jamming power with minimal effect on the desired signals.

Abstract: A radiation-induced substrate photo-current compensation apparatus for a silicon FET on a sapphire substrate having an additional pair of electrodes on the substrate in a precise geometrical relationship to the source and drain electrodes to provide a compensating substrate current which flows into the source and drain electrodes, eliminating the undesirable effects of radiation on the semiconductor.

Abstract: A holder for milling a countersink filler plug, the holder having a bolt-like configured support on which the filler plug is mounted prior to the milling procedure. A sleeve slidably circumscribes the bolt-like support and is of a height less than the height of the bolt-like support. Adjustment washers are positioned adjacent the sleeve in order to regulate the position of the sleeve relative to the bolt-like support. The filler plug rests upon the sleeve circumscribing a portion of the bolt-like support such that the porton of the filler plug which is not in abutment with the bolt-like support can be easily removed by the milling tool during the milling procedure.

Abstract: The invention comprises an interferometric load sensor, or force balance 10 which utilizes etalons 12, 14 to form a reflective cavity 16. A fringe pattern is formed in cavity 16 by light from laser source 26. One of the etalons (14) is mounted to a section 20 that is sensitive to the application of a force 22. Flexing of cantilever 24 due to application of force 22 on section 20 changes the air gap wedge angle between the etalons 12, 14 and thereby shifts the fringe field formed in cavity 16. The shift in the fringe field is observed by light detectors 30, 32.

Abstract: A technique for rapidly delivering drugs and/or chemicals to a specific area of the body by subjecting a liposome encapsulated drug and/or chemical to nonionizing electromagnetic fields. By subjecting the liposome to such fields in the range of 26-2,450 MHz drug/chemical release occurs in a rapid fashion and at temperatures that the liposomes are normally not leaky. This is a non-thermal effect of the field on the liposome that is not related to heating. Consequently, localized release of drug/chemicals can be effected without subjecting the diseased tissue to adverse heating. In addition, drug/chemical release due to electromagnetic-field treatment of liposomes is enhanced by serum and/or oxygen.

Abstract: A low noise crystal controlled oscillator utilizes a single low impedance modular amplifier in conjunction with matching low impedance fixed element subcircuits to achieve predictable and repeatable frequency stability. A low component count enhances circuit reliability.

Abstract: The damping of vibrations in a mechanical structure is accomplished while minimizing the impact on the design and operation of the structure through the use of a plurality of attachable vibration damping elements. Each vibration damping element contains: an accelerometer, an integrator, mixer, power amplifier, and a force actuator. The accelerometer measures the motion of the vibration in the structure at its attachment point and produces an acceleration measurement signal. The integrator integrates the acceleration measurement signal to produce a velocity measurement signal. The mixer produces a composite motion signal by mixing the acceleration measurement signal with the velocity measurement signal. The power amplifier adjusts the phase and amplitude of the composite motion signal to drive the force actuator to damp the sensed vibration along one dimension at the attachment point of the force actuator.

Abstract: The invention relates to a liquid atomizer having a liquid atomizing rotor rotatable about an axis, and designed to feed a liquid into its inlet, along a liquid flow surface of the rotor and through its outlet as an atomized spray. The liquid flow surface is formed by a bent sheet member, fluted or zig-zag in formation, forming a closed figure surrounding the axis, and two generally symmetrically formed sheet portions, and doubler seams on diametrically opposite sides of the sheet portions for counterbalancing during rotor rotation about the axis.