Abstract: A method of modulating the output of a solid state diode laser by directly straining the laser chip. The chip is mechanically coupled to a transducer such as a piezoelectric crystal in such a manner that a dimensional variation in the transducer is translated into a corresponding variation in the chip. It is contemplated that the modulated output will have application in communication systems and in particular a hydrophone system.

Abstract: A diffraction radiation generator in which a ribbon electron beam is directed over a diffraction grating within an open resonator at a selected velocity to generate coherent radiation. After passing through the open resonator, the ribbon beam is directed through aligned slits in two or more conductive elements to a collector. Progressively negative voltages relative to the grating voltage can be applied to the elements and the collector to decelerate the electrons forming the ribbon beam and thus minimize heating of the collector and increase the operating efficiency of the generator. Also, the elements and the collector can be utilized to analyze the ribbon beam.

Abstract: Method and apparatus for conversion of digital multistate signals, represing a numerical value, to an optical output signal having an amplitude analogous to the numerical value. A controllable density optical transmission device provides plural optical signals representative of the digital states of components of the input signal. The plural optical signals are weighted and summed by optical filters to provide the desired analogous optical output representing the input numerical value. The use of phase shifting filters enables the conversion of negative and complex numbers. A two dimensional liquid crystal array may be used as the controllable optical transmission device to enable conversion of a plurality of numerical values simultaneously.

Abstract: Aluminum alloy armor weld joints are ballistic shock tested by first sepaely determining the ballistic impact capability of the components to be joined by the weldment by firing a plate proofing projectile at 0.degree. obliquity at each of said components at different striking velocities. The welded joint designs and welding procedures are then tested by firing the same projectile at the same angle at each of the components of the weldment so that the projectile impacts each component in the vicinity of the weld at a velocity comparable to the critical velocity of the component being impacted.

Abstract: A mechanically offset fluid amplifier for converting the absolute pressure f a pressurized fluid to a differential pressure indicating the pressure of the pressurized fluid relative to a predetermined set point pressure. The device includes two outlets separated by a splitter, a supply nozzle for directing a jet of the pressurized fluid toward a first of the two outlets at a velocity determined by the absolute pressure, and control elements for deflecting the jet toward the second outlet such that as the jet velocity increases from zero, the deflection of the jet increases to a maximum value and then decreases until the differential pressure between the two outlets is equal to zero when the absolute pressure of the pressurized fluid is equal to the predetermined set point pressure.

Abstract: A method and apparatus for receiving and detecting pulsed RF signals within first frequency band. Incoming pulsed RF signals are supplied to a linear amplifier which amplifies any of the signals within a broader second frequency band. The pulsed RF output signals of the amplifier are supplied to an in-band signal detection circuit controlling switches in the outputs of a first video detector and a frequency discriminator which are also supplied with the amplifier output signals, so that output video and frequency signals are provided only for pulsed RF signals within the first frequency band.

Abstract: A method and apparatus for converting the absolute pressure of a pressuri fluid to a differential pressure indicating the fluid pressure relative to a reference pressure. The pressurized fluid is directed asymmetrically into a laminar proportional amplifier (LPA) along a centerline toward a first of two outlets at a velocity determined by the fluid pressure. The LPA includes first and second control inlets disposed on opposite sides of the directed fluid jet and connected to a common source of control fluid, the first control inlet being disposed on the same side as the first outlet, and the second control inlet being disposed on the same side as the second outlet.

Abstract: A thermal target display system and method is disclosed by which thermal radiation patterns simulating the thermal "signature" of selected "real-scene" objects such as vehicles, buidings, and personnel, can be readily generated. The system utilizes a plurality of individually controlled, active heat-radiating thermal elements disposed in an array to form a thermal screen or target. The thermal screen is interfaced with a video system and is energized in response to a video image representing the real-scene object in the infrared spectrum. In the preferred embodiment, the gray scale representations of the individual video image pixels are converted into signals which define desired temperature differentials of each of the individual radiating elements of the thermal screen or target, these signals controlling the energization of the thermal elements so that the thermal screen generates a radiation pattern which corresponds to a particular video frame.

Abstract: A method for deforming materials which are ferroelectric, have remanent polarization, and which exhibit a length-dependent photoelectric effect. One type of material is photovoltaic, piezoelectric, ferroelectric ceramics. Illuminating such materials causes them to deform, either in length or in thickness, depending on the direction of the remanent polarization. A single plate of such material may be used, or a pair of plates bonded together may be used.

Abstract: A microstrip array antenna, including spaced radiator elements supplied w microwave power and separated from an underlying ground reference plane by a layer of dielectric material, in which the antenna beam is phase scanned by periodically closing switching devices connected between the reference plane and at least one null point of each radiator element. In one embodiment, the radiator elements are identical rectangular patches disposed along a path, each patch having a length parallel to the path of one-half wavelength and a width transverse to the path not exceeding one wavelength in the underlying dielectric material at the antenna operating frequency. The patches are connected in series to receive microwave power by conductive strip elements whose widths are selected to effect a desired distribution of radiated microwave power from the patches.

Abstract: This multi purpose hand tool comprises a pair of double ended wrenches each ith an open-ended wrench at one end and a box wrench at the other end. The shanks of each wrench are preferably of circular cross section and each has a different sliding tool thereon. One of these sliding tools includes a hook adapted to engage the tie rod adjusting sleeves of automobiles to facilitate the adjustment thereof. The other sliding tool comprises an offset screwdriver with an adjustable lever arm. The wrenches can be attached to each other for safekeeping by means of a square stud on one of the sliding tools and a mating hole on the other sliding tool. The tool is designed for fast and accurate adjustment of automotive front ends.

Abstract: A hand held and operated tool for quickly and accurately adjusting the idle ixture adjustments of multiple barrelled carburetors. The tool has a pair of screwdrivers with flexible shanks which can be applied to the idle mixture adjustment screws and turned in unison by turning a knob on a gear box, or the shanks can be separately turned to provide fine tuning of the idle mixture adjustments.

Abstract: A photofluidic interface that transduces optical control signals into fluid ontrol pressures is provided in which an AC modulated light source is utilized to transmit control signals to a photo acoustic cell that absorbs the light energy and converts it to heat energy thus creating pressure pulses within the cell. The output signal of the photo acoustic cell is then fluidically amplified, fluidically rectified and again fluidically amplified to create an output signal that drives an actuator.

Abstract: A substrate which serves as an element for building an electronic module for ordnance applications comprising a body portion, for receiving electronic components, and a plurality of tab means extending therefrom for interlocking with complementary tab means on another similar substrate. The tab means may extend from the top, bottom, and/or sides of the substrate, and serve to mechanically and electrically interconnect with complementary tab means or apertures on adjacent substrates to form an electronic module of high mechanical strength and reliability. Such an electronic module may be assembled from at least three substrates. Each substrate has at least two tab means on each side edge thereof.

Abstract: A gas flow rotor cyclically connects a microphone to a dynamic flow press and then a reference static flow pressure. The microphone converts the pressures to a resultant alternating differential signal providing a first input to a phase-locked amplifier. A second amplifier input is derived from an optical pickup mounted on the rotor. Only the AC component of the converted microphone signal, which has a fixed phase relationship to that of the rotor, is amplified. A readout connected in circuit with the amplifier indicates the dynamic flow pressure.

Abstract: A system for identifying a selected conductor at the other end of a multinductor cable. A signal is imposed on the selected conductor at one end. At the other end of the cable, a probe is capacitively coupled successively to the several conductors. The selected conductor is identified by the relatively large capacitively coupled signal.When capacitive coupling between wires may degrade system performance, signals of two different frequencies may be applied to the selected conductor and another conductor, respectively. The selected conductor can be identified by the large ratio of the magnitude of signal detected at the frequency applied to the selected conductor as compared to the magnitude of the signal detected at the other frequency.

Abstract: A plurality of control jets is provided in the nozzle-centerbody of an air riven resonator to deflect portions of the incoming air flow away from the resonator. The control jets operate so as to deflect major portions of the air flow during high velocity flight, while not substantially deflecting the air inflow during low velocity flight.

Abstract: In an intercom system, electrical noise interference is alleviated by interconnecting the tranceivers and receivers with the control sets via fibre optic lines. Audio signals are applied to a multiplexer which drives an optical modulator. The output of the optical modulator feeds a fiber optic line. Conversely, optical signals are fed to an optical demodulator whose output feeds a demultiplexer. Audio outputs from the demultiplexers feed the receivers and tranceivers and control sets.

Abstract: A rotatably shaft is directly supported by at least three wheels, including drive wheel. The circumferential edge of each of the wheels frictionally engages the circumferential edge of the shaft. The shaft is in frictional contact with each of the wheels, and is driven by the drive wheel. Speed step up is achieved because the diameter of the drive wheel is larger than the diameter of the shaft.

Abstract: A variable microwave stripline power divider, in which the power seen at h of two outputs can be varied over a wide range without appreciably changing the power seen at the other output. In one embodiment, this is accomplished mechanically by shorting posts connecting the patch member to a ground plane member of the device at selected points. In another embodiment of the invention, this is accomplished electronically by a plurality of electronic switching devices connected between a like plurality of patch member shorting points and a ground plane member, which are selectively activated by a microcomputer.