Abstract: An automated test system and method for infrared focal plane detector arr which utilize X-Y positioning of a focused laser spot scanning individual detector array elements Detector element outputs are processed for the entire focal plane array resulting in crosstalk measurement.

Abstract: A fire suppression system for a dumb waiter for carrying hazardous materi in a multiple story building includes an exhaust at the top of the shaft, a storage compartment for carbon dioxide gas above the topmost floor served by the dumb waiter, a first nozzle in the shaft near the top thereof, a second nozzle in the shaft near the bottom thereof, and conduits interconnecting the storage compartment and the nozzles. The system further includes vapor detectors in the shaft, each of which is adapted, upon detection of unsafe vapors in the shaft, to open the conduits to flow the carbon dioxide gas from the storage compartment to the nozzles and thence into the shaft above and below the dumb waiter, and to shut down operation of the exhaust.

Abstract: A device for housing toxic waste or toxic munitions including a vessel having a body flange and a removable cap that interfaces with the body flange to make a hermetic seal. A primary and a secondary O-ring are positioned between the cap and the body flange to ensure a leak-proof seal having an integrity of 1.times.10.sup.-6 He/sec at one atmosphere at standard temperature and pressure (STP).

Abstract: A thermophotovoltaic generator for use in generating electricity using a or liquid fueled light emitter and an absorber with photocells, is provided. This generator includes a burner and mantle light emitter, and includes a multi-layer absorber having cylindrical layers of peripherally spaced tube units, each unit having end wall photocells which form a chamber that contains a dye.

Abstract: A circuit is disclosed for detecting RF pulses, regardless of the frequens associated therewith. Such pulses are characterized by envelope configurations of a common frequency and perceived with a frequency analyzer that responds to that common frequency. In the preferred embodiments, a static Chirp-Z analyzer is incorporated when narrow pulses are of primary interest and a dynamic Chirp-Z analyzer is incorporated when wide pulses are of primary interest. In other embodiments, static transform gain is enhanced with dynamic transform gain.

Abstract: A method and apparatus for finding internal charge flow distribution in a dual-channel field effect semiconductor device having at least two source terminals, two drain terminals, a control gate and two isolation gates. Electrical energy of different frequencies is applied to different ones of the source terminals for causing currents to flow in each of the channels between the source and drain terminals. Using the isolation gates to achieve channel pinch off, one of the drain terminals and one of the source terminals are selectively coupled to only one of the channels. A control signal is applied to the control gate for controlling the amount of the electrical energy conducting in each of the channels. Data is collected by measuring currents at the different frequencies at each of the drain terminals while a magnetic field perpendicular to the plane of the channels is varied.

Abstract: In order to protect a delicate photodetector from high-intensity radiation, such as from a laser, a device for limiting optical power to the detector is interposed between the radiation and the detector. This device has an optical interface that totally reflects high-intensity radiation, but which freely transmits normal (low intensity) radiation to the detector. The interface is between two optical materials, one with a linear index of refraction with respect to radiation intensity, and the other with a non-linear index. At low intensity radiation levels, the two materials have the same indices of refraction, and such radiation is freely transmitted through the interface, but with high-intensity radiation, a mismatch of indices of refraction allows total reflection at the interface.

Abstract: A planar dual band antenna comprising three superimposed dielectric layers, ground plane on one external surface, a conductive patch on the other and parallel conductive strips at the interface of dielectric layers that is closer to the patch. The dielectric constant of the middle layer is different from that of the two other layers.

Abstract: An expansion linkage effects nearly perfectly straight translation of an ansion module relative to a trailer. The linkage has two relatively longer cross arms pivoted together at their intersection. One cross arm is additionally pivoted at its mount to the trailer and the other cross arm is additionally pivoted at its mount to the module. At opposite ends from the mounts, the cross arms have relatively shorter linkage arms pivoted thereto. The linkage arm pivoted to the trailer-mounted cross arm also pivotally connects to the module, and the linkage arm pivoted to the module-mounted cross arm also pivotally connects to the trailer. The intersection of the cross arms is 2/3 to 3/4 the distance from pivot axes at the cross arms' mount ends to pivot axes at the cross arms' opposite ends.

Abstract: A phase shifter having a single or monolithic ferroelectric material and a lurality of ferroelectric transmission lines formed thereon, each having a different effective physical length and associated delay or phase shift. The plurality of different lengths of ferroelectric transmission lines has a voltage source associated therewith for applying a predetermined bias voltage, resulting in a change in permitivity in the ferroelectric substrate material. The different lengths of ferroelectric transmission line formed on the single substrate have a predetermined relationship between their effective physical linear lengths. By selectively activating the different lengths of ferroelectric transmission line by applying a bias voltage in different combinations, a desired or predetermined phase shift is obtained. The single or monolithic ferroelectric substrate used greatly reduces the overall length of the ferroelectric phase shifter.

Abstract: A substrate free single crystal pyroelectric film particularly suited for use in rapid thermal response sensors is made from a single crystal substrate by a method including the steps of:(A) etching a pattern into the substrate;(B) epitaxially growing a highly oriented superconducting material into the etched pattern to fill the etched pattern,(C) epitaxially growing a highly oriented crystalline film of a pyroelectric material over the entire surface of the substrate, and(D) dissolving away the highly oriented superconducting material.

Abstract: A new optical diode is disclosed that permits unidirectional transmission of light, the direction of transmission depending on the direction of incidence. The diode comprises a stack of alternating layers of a low-index material and a high-index material. The layers are arranged within the stack such that there is spatial anisotropy of optical pathlengths in the stack and at least the low-index layers or the high-index layers have an optical nonlinearity, either inherently or by doping. At sufficiently high incident intensifies and appropriate wavelengths, such a diode exhibits partial transmission of input light incident from one direction while reflecting almost totally input light incident from the opposite direction.

Abstract: Disclosed is a method for measuring intermolecular force related physical properties of an objective liquid such as elongational viscosity and dynamic surface tension, comprising the steps of atomizing neat liquids to a particle size in a gaseous fluid stream, measuring the particle size of the atomized neat liquid, determining an empirical expression based on known physical properties of the neat liquid and the atomization conditions, and using the empirical expression and identical atomization conditions to rapidly determine the unknown intermolecular force related physical properties of the objective liquid, the objective liquid being another neat liquid or a liquid in which a solute is dissolved.

Abstract: A method for and system of measuring the thickness of a component dimension f a sample material. Sound waves are coupled for transmission along a component direction of a sample material and also through first and second reference standards to provide first and second reference thicknesses. As the sound wave signal is transmitted, the time for the sound wave signal to traverse the sample thickness and the first and second reference thicknesses is measured. The thickness of the sample is calculated by calculating the velocity of the signal from the traverse times for the first and second reference thicknesses. Preferable, the calculations are made by a computer, and may be repeated over a period of time to calculate a change of thickness as a function of time.

Abstract: A leak detector is provided for detecting and indicating a leak opening of seam in a mortar increment container or the like. This will work with porous or non-porous materials. The leak detector includes a plurality of thermistors arranged to sense selective portions of the seam, and a process circuit for receiving respective signals from the thermistors for identifying and displaying a leak condition or a no-leak condition or a bad-thermistor condition.

Abstract: Disclosed herein are immunogenic mutant Shiga-Like Toxin II variants and vaccines containing such toxins. The mutant toxin comprises an SLT-IIv where the amino acid at position 167 in the A subunit has been replaced by a differently charged amino acid that essentially maintains the structure of the native A subunit. In a preferred embodiment, the glutamic acid is replaced with glutamine. An analogous modification may also be made at position 170. The vaccines are used for edema disease of swine.

Abstract: A trailer surge brake actuator comprises a plurality of stacked slider asblies. At least one rigid first tubular body is affixed by suitable means to the front end of a trailer. A first rigid cylinder slider attached to the towing vehicle extends longitudinally and reciprocates inside the first tubular body. Attached to the first slider is a rigid member connecting the first slider with at least one second cylinder slider which reciprocates within a second tubular body attached to the top of the first tubular body. The rigid member prevents the first and second sliders from rotating when the towing vehicle's pintle rotates. The second slider's end within the second tubular body is in contact with a pushrod that actuates a brake master cylinder attached to the aft end of the second tubular body.

Abstract: The jet of a shaped charge ammunition round may be disrupted and dispersed y altering the local charge to mass ratio within the shaped charge round. A shaped charge round typically produces a coherent jet suitable for penetrating thick armor or the like. However, such coherent jets may be unsuitable for damaging thinner targets. By placing a mass (or removing a mass) at a local portion of the shaped charge liner, the outer casing, or the explosive charge, the local charge to mass ratio may be altered, causing disruption of the coherent jet. A wire, wrapped around the charge liner in a spiral fashion, may be used to produce a substantially helical or spiral shaped jet which may be particularly applicable for damaging missiles or the like.

Abstract: An audio optical processor unit employing a nonlinear organic optical element which may be in the form of a nonlinear polymer, a nonlinear organic material or a mixture of liquid crystal materials or polymers. The nonlinear organic optical element is interfaced by a piezo-electric crystal which encodes a laser beam passing through the optical element by inducing changes in the index of refraction or the changes in voltage potential across the polymer or non-linear organic material. The resulting encoded output is detected in a conventional manner by a photodetector array.

Abstract: A liquid propellant igniter uses axially aligned ring electrodes separated y high strength ring-shaped insulators and a high-voltage electrode assembly to provide reliable electrical discharges for initiating and igniting a propellant.