Abstract: An eddy current flaw detector is held in a mounting block by a spring bias, the mounting block is selectively rotatable about a shank member for varying the radius of the detector as the shank rotates about a pivot point, turned by an electric drive mechanism.

Abstract: An environment sensing system that prevents rotation of a grooved rotor surface mounted on a shaft, with a ball, until a deceleration force causes the ball to climb an inclined surface, a bias spring causes the detent grooves to maintain alignment with the ball.

Abstract: A system and method of using a bore scope with an attached video system, the true field of view is measured, cross hair lines are generated on the video monitor and measured for extremes of field and again bracketing the object, a ratio is formed and is used as a multiplier of the true field of view. The result is the actual dimension of the object.

Abstract: An apparatus for inspecting for cracks under installed fasteners and the like using a multiple frequency digital eddy current system. A computer with a plurality of digital arrays generate drive signals which are converted to analog and applied to the test coil, a second set of digital arrays generate balance signals, are adjusted in amplitude and phase and drive signals so that the output of the test coil is zero in a test specimen, output signals from a work piece are processed in the computer giving phase-sensitive crack detection.

Abstract: A process for forming planar liquid crystal matrix array chips including the steps of electro-plating a conductive material over a smoothing layer thereby filling the contact holes with conductive material or alternatively placing a photoresist over the micro circuit, electroplating over the photo resist, which is then dissolved leaving conductive posts. The smoothing material is applied around the posts and the surface then polished, made flat and reflecting electrodes attached.

Abstract: A portable device for coupling optical fibers consisting of an insulative block so designed as to allow a number of optical fibers to come together, a piezoelectric generating means secured to the block and connected to the piezoelectric generator so that optical fibers will be brought together at a point between the electrodes. Electricity generated causes an arc across the electrodes which generates sufficient heat to join the optical fibers.

Abstract: A system for correlating electronic distance measurement and aerial photography where an airborne electronic location station is photographed as it passes over an area to be surveyed. The position of the airborne station is precisely measured as it moves and this information is included in the final image processing.

Abstract: Infra red (IR) vidicon camera tube performance is improved by alternately switching the sensing layer voltage to one of two values in synchronism with the frame rate of an IR TV camera. In operation the sensing layer is switched to a high voltage for two frames and then switched to the normal voltage for one frame readout. Camera tube response is in real time, thereby eliminating need for change in scanning beam rate or subsequent data processing of recorded video data.

Abstract: A method of spatially tailoring the surface barrier of MOS devices by means of a scanning electron microscope using ionizing radiation at the silicon dioxide-silicon interface to control the surface charge distribution. The MOS is subsequently annealed at about 300.degree. C. for several hours to stabilize the surface potential.

Abstract: A device for the protection of antennas against lightning and electromagnetic pulse consisting of an electrically conducting rotor that is free to turn on a conducting shaft which is connected to the antenna. This combination is placed within an electric coil with one end connected to ground. The rotor is mounted eccentrically within the coil so that when a predetermined critical voltage on the antenna is exceeded electrical current flows through the rotor, and coil to ground via the air gap separating the rotor and coil, a magnetic field is set up in the coil which turns the rotor and reduces the air gap as the voltage is dissipated, after discharge of the surge, the rotor returns to its quiescent position.

Abstract: The invention comprises a braided wire having a shaped clip soldered or otherwise connected to each end. The clip is so formed as to follow the shape of a retainer which is designed to secure a rubber weather seal by means of a cable and groove arrangement.

Abstract: A tapered capacitive probe embodies vertical stripes for detecting irregular flaws in metal holes. Horizontal stripes are added to the probe and connected in a one-to-one relationship with the vertical stripes to detect and measure flaws with angular uniformity. Invention allows flaws to be detected in vertical, horizontal or angular direction and discloses approximate shapes and locations.

Abstract: A circuit board with connectors along more than one side designed to be stacked with similar boards, having a plurality of electrical contacts to connect to a connector header with resilient contacts, applying a force to the circuit board which is inclined from a central axis whereby the circuit board and the connector header join a tight, reliable compression contact.

Abstract: An optical gunsight retractably mounted on the canopy rail of an aircraft having a luminous pip or reticle for sighting a target. The gunsight may be boresighted in azimuth and elevation to any onboard target designation system to aid in immediate target acquisition by that onboard designator system.

Abstract: A filter network for separating a transmitted communication frequency into discrete channels. A separator, exemplified by a triplexer, includes a pluggable mid-range high Q bandpass filter and a diplexer of low Q bandpass filters. Circulators receive signals reflected from the high Q filter and pass them to the low Q filters. A combiner circuit takes the attenuated signal from the low Q filters and sends it through a circulator to a high Q plug in filter where the signal passes through a circulator where it is combined with the signal from the high Q filter of the separator as output.

Abstract: A shear transducer having two cylindrical bending beams with two full strain gage bridges so arranged to cancel acceleration induced by forces in the axis of interest.

Abstract: A method for adding a residual compressive stress to the rim of a turbine disk by heating the disk to a uniform high temperature, then insulating the rim from the remainder of the disk and cooling to a temperature wherein the rim yields in tension.

Abstract: A simplified guidance system for air-to-air missiles where the pilot adjusts his helmet sight to compensate for missile errors and this information is fed to a computer which computes correction data from error information, aircraft position information and missile position information, correction data is then sent via a radio link to the missile control system which changes the flight path accordingly.

Abstract: A pilot operated stepping valve where an electrical pulse motor drives a pilot valve spool which controls the flow of hydraulic fluid driving a main valve spool which actuates a hydraulic motor or actuator. The main valve spool follows the pilot spool and is hence sensitive to the pulses received by the pulse motor.

Abstract: A transistorized engine chip detection system including a milliammeter to give a visual indication of chip buildup and a full light to operate at a critical preset level, utilizing a voltage divider network, a decrease in resistance in the chip detector will cause an increase in current flow, and subsequent lighting of a warning light. A short circuit or large chip would turn light on and give full scale meter reading, broken or unplugged harness turns light on and gives zero meter reading.