Abstract: A method for restoring integrated circuit devices in an encapsulated array of integrated circuit devices includes the steps of testing the array and applying a voltage signal to pins appearing to be disconnected from an element internal to the array.

Abstract: A tool, specifically adapted for inserting a lamp module in a lamp module receptacle and for removal of a lamp module from a receptacle, is provided with a longitudinally extending handle having opposite ends and a lamp removal head at one end of the handle for engaging the head of a lamp tether and disconnecting the tether head from a tether rail, and a lamp insertion head at an opposite end of the handle to facilitate engagement of a lamp tether head with a tether rail in a lamp receptacle.

Abstract: A radiating coaxial cable includes an inner conductor, an electrical insulator located about a periphery of the inner conductor, and an outer conductor located about a periphery of the electrical insulator. The outer conductor defines groups of apertures spaced from each other a predetermined distance in the range of from about twice the longest operational wavelength of the cable to less than ten meters. The aperture groups are designed in such a way to excite a surface wave at low operating frequencies and a combination of surface and radiating waves at high operational frequencies.

Abstract: A plurality of sensing coils are formed by spiral coil electrical conductor sections deposited on a flexible substrate which is formed into a cylindrical form about a central axis. The conductor sections are spaced apart by a distance equivalent to one-quarter of the circumferencial length of the cylindrical form, to define four separate coils spaced apart by 90 degrees. Coil sections are deposited in the register on opposite sides of the substrate and interconnected through the substrate. The coil pattern may be repeated in adjacent areas of the substrate to form a multi-layered coil when a number of turns of the substrate are wound around the central axis.

Abstract: The invention centers around a circuit board assembly having a heat sink with a buss bar integrally formed therein. The heat sink is provided between two parallel, opposed circuit boards. The buss bar is provided between the two circuit boards and is in electrical contact with circuit modules provided on both circuit boards. The buss bar is electrically insulated from both the circuit boards and the heat sink but electrically connected to the circuit modules.

Abstract: In an inductive debris monitor (IDM) an inductive probe is disposed at a fluid flow passageway to be monitored, and an RF bridge containing a variable resistance network is used to detect changes in the impedance of the probe due to the passage of metallic debris. An indirectly heated thermistor is utilized in the resistance network for balancing the bridge. Thus the operating temperature range is significantly extended without compromising reliability or experiencing degradation.

Abstract: A force detecting microsensor comprises a single crystal Si substrate, a single crystal cone formed on the substrate and a resilient electrode mounted above the tip of the Si cone. The space between the tip of the Si cone and the resilient electrode is maintained in a vacuum environment and the distance between the tip and the resilient anode is in the order of a few atomic diameters. The tunneling effect of electrons occurs between the tip of the Si cone and the resilient electrode when a potential is applied to the resilient electrode and the Si cone tip. The resilient electrode deflects as a result of the force acting on the microsensor. The deflection of the resilient electrode alters the electrical characteristics between the resilient electrode and the Si cone tip. The changes in the electrical characteristics can be measured to determine the level of force acting on the microsensor.

Abstract: A limited-access computer, such as an on-board flight management computer, stores a first table in a protected area of its memory defining data items in the computer memory which may be accessed, for reading and/or writing purposes, by a user such as an airline operating a ground computer. A second table, in a non-protected area of the memory, is supplied by the user and defines formats of data reading and writing messages to be transmitted by the user and identifying specific data items to be accessed for each message. The items defined by the user in messages in the second table are limited to the set of data items which are defined as accessible data items in the first table. In response to a received user message, the limited-access computer reads the second table to identify data items in the message and on the basis of data item definition information in the first table accesses the identified data item.

Abstract: A force detecting microsensor comprises a single crystal Si substrate, a single crystal cone formed on the substrate and a resilient electrode mounted above the tip of the Si cone. The space between the tip of the Si cone and the resilient electrode is maintained in a vacuum environment and the distance between the tip and the resilient anode is in the order of a few atomic diameters. The tunneling effect of electrons occurs between the tip of the Si cone and the resilient electrode when a potential is applied to the resilient electrode and the Si cone tip. The resilient electrode deflects as a result of the force acting on the microsensor. The deflection of the resilient electrode alters the electrical characteristics between the resilient electrode and the Si cone tip. The changes in the electrical characteristics can be measured to determine the level of force acting on the microsensor.

Abstract: An optical rotation sensor comprises a light amplification stimulated emission ring laser formed in a solid medium is provided with phase modulator devices which produce push-pull phase modulation of counterpropagating optical waves in the ring thereby enhancing bidirectional lasing in single longitudinal modes in each direction. A frequency selective output coupler couples a predetermined portion of the optical energy at the lasing frequency from the ring to an output waveguide. A substantially U-shaped output waveguide having legs extending away from the ring in opposite directions and toward a common position. Clockwise and counterclockwise light waves are coupled from the ring to the two separate legs of the output waveguide and are directed to the common position to create an interfering light pattern on photodetector apparatus. The interfering light pattern is indicative of the rate of rotation, as defined by the Sagnac effect.

Abstract: An interferometric fiber-optic gyro system includes a light source and a plurality of optical fiber rings employed to measure angular displacement along three axes. Optical circuit elements interposed between the source and the rings include an optical switch for periodically applying the optical signal to each of the rings individually along three separate optical transmission paths. Included in each of the optical transmission paths is a modal filter, including a polarizer, and a beam splitter which provides two separate beams to the optical ring for counter-propagation through the ring. Compensating birefringent devices are added in the optical circuits to compensate for a residual birefringence introduced by the various optical elements in the circuits. The characteristics of the compensating devices consist of predetermined lengths of polarization preserving, single-mode optical fiber. The birefringence of each of the optical devices is characterized in terms of a total number of beat lengths.

Abstract: A network structure for path generation includes an operational amplifier circuit (200) implementation. The circuit (200) implements a finite difference approximation template for computing the weighted sum of its four "neighbors." The circuit implementation (200) includes a series of five output operational amplifiers (202, 204, 206, 208 and 210). Each of the output amplifiers includes a feedback path (212) having a feedback resistance, and is connected to the output terminal of its respective operational amplifier and to the negative input terminal (214) of the corresponding amplifier. The positive input terminal (216) of each of the output operational amplifiers is connected to a ground (218). The circuit implementation (200) further includes a series of input operational amplifiers (220, 222, 224, 226 and 228). The output terminals (230) of each of the input operational amplifiers are connected to respective ones of the input terminals (214) of the output operational amplifiers through input impedances.

Abstract: An optical rate sensor apparatus (300) measures rates of angular rotation along a plurality of orthogonal axes. The apparatus (300) comprises a passive ring Sagnac interferometric arrangement having a light source circuit (308) and a series of multi-turn fiber optic rings (302, 304, 306). An optics/modulator circuit (312) selectively switches optical waves emitted from the light source circuit (308) into gyroscope channels and transmits the signals through fiber optic rings as counter-propagating optical waves. The optics/modulator circuit (312) also recombines the optical waves after they emerge from the corresponding rings. The optics/modulator circuit (312) includes optical components integrated onto an integrated optics chip (IOC) consisting substantially of lithium niobate. Optical fibers (606, 608) are coupled from the rings (302, 304, 306) to the integrated optics chip.

Abstract: An article is manufactured from a substrate of a material that exhibits the pyroelectric effect by depositing a film containing a selected material in a first state over a front surface of the substrate. At least one electrode is formed on the film, portions of the film being exposed around the electrode. The exposed portions of the film are subjected to a treatment such that they are converted from the first state to a second state, in which the material has a resistivity that lies within a desired range of values.

Abstract: A required time of arrival (RTA) control system (200, 220, 240) is disclosed for use with an aircraft on-board computer system (100). The control system (200, 220, 240) is adapted to provide data for controlling aircraft flight in a manner so as to meet time of arrival constraints at selected waypoints. The control system (200, 220, 240) includes means (212) for determining a time error between an estimated time of arrival and a designated RTA. A cost index predictor (216) is utilized to determine an estimated cost index parameter for meeting time of arrival constraints, while maintaining relative minimum fuel consumption. A flight profile predictor (202) is adapted to generate requisite target air speed data based on the estimated cost index parameter. In one embodiment, the system (240) includes determination of a time window based on maximum and minimum permissible cost index and speed limiting parameters.

Abstract: A method and apparatus for mounting a video type display tube (20) in a given dynamic mechanical environment employs a plurality of mounting members (56, 56a, 56b, 56c) which are secured to the periphery of the tube (20) at four corresponding predetermined static and dynamic reaction points (1,2,3,4) where substantially minimum bending and torsional stresses occur for the mounted tube (20). Elastomeric grommets (53,54,52a,54a,52b,54b,52c,54c) having a predetermined dynamic stiffness over a desired temperature range capable of attenuating the associated dynamic G forces of the dynamic mechanical vibration and dynamic mechanical shock in the given dynamic mechanical environment are mounted in opposing pairs in an aperture (60) in each of the respective bracket members (56, 56a,56b,56c).