Abstract: A ring laser gyro, having: an envelope for an optically resonant cavity having a gain bore section, the envelope containing an active gas medium. The envelope contains electrically gain bore energizable electrode means having at least two electrodes at electrode locations within the envelope for establishing an electrical discharge in an active gas medium between the electrode locations. The electrical discharge excites a pair of light beams along a lasing path between the electrode locations. The light beams counter-propagate in the optically resonant cavity. The envelope is coupled to means for generating an output signal for the gyro by measuring a difference in the frequencies of the light beams. The active gas medium has an axial current driven gas flow and a return gas flow induced by the electrical discharge in the gain bore. The resultant gas flow contributes to bias errors in the output signal.

Abstract: The Infrared absorptive coating for beryllium surface shown here is produced by providing a flat beryllium surface 10, which is cleaned 12, toughened 14, coated with a modifying material 16-22, and anodized 24. The modifying material, preferably aluminum, is selected for infrared absorptiveness. It is applied in a thickness, preferably about 0.0001 inch sufficient to provide such absorptiveness without excessively interfering with the nuclear hardness of the underlying beryllium.

Abstract: This invention is for an object moving actuator composed of a stack of independently controllable layers which convert thermal exobaric pulses into mechanical motion. Each layer can be a lifter for moving the stack normal to the object to be moved or a tangenter for moving the stack tangentially to the object. Each layer has a plurality of chambers having a heat source and a thermal expansive material contained therein. The heat source is controlled by a controller to generate a heat pulse which expands the thermal expansive material thereby moving a rolling barrier to make the layer move normally or tangentially. Preferably two pair of actuator stacks work together to alternately engage and move the object. The first pair makes contact with the object by lifter motion and moves the object by tangenter motion while the second pair is lifted off the object and retraces to get into position to contact and translate the object.

Abstract: A laser radar for scanning a target aperture having a predetermined array of locations comprising a laser means having a power source and a resonator cavity containing a lasing medium, the laser means providing a SINGLE FREQUENCY LIGHT SOURCE (FO); means for dividing the SINGLE FREQUENCY LIGHT SOURCE into FIRST and SECOND REFERENCE FREQUENCY BEAMS; frequency shifting means for frequency shifting the FIRST REFERENCE FREQUENCY BEAM to form a FREQUENCY SHIFTED BEAM; control means for providing APERTURE DIRECTION SIGNALS; scanner means responsive to the APERTURE DIRECTION SIGNALS for combining and directing the FIRST REFERENCE FREQUENCY BEAM and the FREQUENCY SHIFTED BEAM to each predetermined target aperture location and for receiving a combined REFLECTED REFERENCE FREQUENCY BEAM SIGNAL and a REFLECTED FREQUENCY SHIFTED BEAM SIGNAL from the target; detector means for combining and detecting a sample of the SECOND REFERENCE FREQUENCY BEAMS in combination with the REFLECTED REFERENCE FREQUENCY BEAM SIGNAL and the

Abstract: The Ceramic frames and capsules for Z-axis modules shown herein are formed by placing chips 10 into a ceramic frame 12, breaking apart the frame 12 into sub-frames 26, and bonding the sub-frames 26 into a module 30. The sub-frames 26 may be separated by ceramic sub-backings 28. Each sub-frame 26 and sub-backing 28 forms a capsule 22.

Abstract: A computing element for use in an array in a neural network. Each computing element has K (K>1) input signal terminals, K input backpropagated signal terminals, K output backpropagated signal terminals and at least one output terminal. The input terminals of the computing element located in row i, column j of the array of computing elements receive a sequence of concurrent input signals on K parallel input lines representing a parallel input signal S.sub.ij having vector elements (s.sub.ij1, s.sub.ij2, s.sub.ij3, . . . , s.sub.ijk).sup.T. The K input backpropagated signal terminals are coupled to receive an m-dimensional (m<K) backpropagated signal vector characterized to provide a measure of the performance error of the computing element. The computing element comprises a weighting function means responsive to the concurrent input signal S.sub.ij for computing a K-dimensional weighting coefficient and a scalar activation signal u.sub.ij by computing a K-dimensional weighting-coefficient vector, W.sub.

Abstract: An analysis system fuzes original data according to system and/or operator imposed rules, displays a graphic abstraction representing fuzed data, and provides, merely at the operator's request, details of the fuzed data and/or of the original data.

Abstract: The ACTIVE SURGE REJECTION CIRCUIT uses a FET connected in one of the TIP and RING leads to open and close the lead. A JK flip-flop is connected to a voltage sensing circuit which senses voltage surges and clocks the flip-flop early in the voltage rise. This activates a first circuit to ground the FET gate and hold the FET open. Meanwhile, a second circuit comprising an RC circuit charges a capacitor which maintains the FET in its OFF condition for a period of time longer than the surge, i.e., about 1 m sec, and then clears the JK flip-flop after the capacitor has discharged a predetermined amount. This invention thus provides surge (noncommon mode) protection, and is especially useful in protecting modems from voltage surges while minimizing signal distortion during non-surge conditions.

Abstract: A digitally switched gain amplifier designed for use in binary controlled systems. The amplifier is designed for fabrication as a monolithic integrated circuit. The amplifier provides gain that varies in discrete levels in a binary manner under direct control of a digital word. The smallest resolution, or distance between gain steps, is one decibel and the maximum amount of gain reduction is determined by the number of stages included in the amplifier. The incremental resolution of the amplifier allows for the amplifier to keep a received signal at a constant level with a digital word. Thus, eliminating the need for digital to analog conversion.

Abstract: A plural-differential phase shift keying (PDPSK) communication system has a transmitter (22) for encoding digital data as plural differentials of phase between successive pairs of channel symbols of a carrier, and a receiver (24) with a plurality of phase differential detectors (32, 48) connected in cascade for determining the plural differentials of phase of the incoming signals to achieve a bit error rate independent of frequency offsets and thereby an improved rate of signal acquisition.

Abstract: A four way 2:1 bandwidth RF splitter/combiner is described. When used as a splitter, the splitter/combiner provides equal amplitude output signals while maintaining quadrature phase over the entire bandwidth of the input signal. This splitter/combiner also maintains a one to one VSWR and eliminates back door intermodulation. When used as a combiner, the splitter/combiner losslessly combines four equal amplitude quadrature phase signals.

Abstract: A variety of embodiments of varactor diodes are disclosed ranging from an N.times.N matrix assembly of individually packaged diodes arranged in N rows and columns to a multi-continuous layered varactor. The matrix assembly varactor has N rows of discrete devices electrically coupled in parallel and multiple rows vertically aligned and electrically coupled in series to each other. The overall matrix assembly capacitance equals the individual diode capacitance of such assembly. When used as a tuning component across a tank coil transmission line, the RF voltage across any device in the matrix assembly is equal to the tank voltage divided by N.

Abstract: This invention relates to a hydrostatic bearing having a journal 3 annularly circumscribed by a bearing 2 wherein a high pressure fluid is forced between the bearing and the journal axially. The high pressure fluid flowing axially along the journal in the bearing keeps the journal centered. A roughened or diamond knurled 11 inside surface interrupts the circumferential and axial flow of the fluid for improved rotor stability and less leakage. Other features include a tapered inner bore 9 to increase the bearing stiffness and a sharp edged inlet for greater control of the bearing stiffness and damping. The axially fed hydrostatic bearing combines the seal function and the bearing function for annular fluid flows along a journal.

Abstract: A method of manufacturing a micro-passage heat exchanger includes preparing a substrate of multiple square tubes, configuring multiple layers of the square tubes in a vertical plane, interposing between each layer a braze alloy to form a core, bonding the multiple layers of multiple tubes to form a core mass, forming in alternate tube layers counter flow fluid channels, providing the core mass with sides and manifolds, and brazing the heat exchanger.

Abstract: An improved avionics fluorescent lamp including a fluorescent tube having a resistive element disposed on its exterior and a terminal block for receiving an inserted fluorescent tube, the terminal block having a semi-rigid electrical contact for contacting the resistive element when the tube is inserted inside the terminal block. A plurality of connectors are disposed on the exterior of the terminal block for providing easy connection between the lamp wiring harness and the filament pins of the fluorescent tube and the resistive element by the semi-rigid connector. And a display device having the fluorescent lamp of the present invention disposed therein where the resistive element is disposed on the reflector side of the tube.

Abstract: The entropic echinoid 2 applies force to an object 6 with the cummulative effect of myriad feet 8 activated by fluid expansion pulses from electrical resistance heaters 30. Each heater lying in a fluid filed socket 10 of a substrate 4 and activated by a signal from a corresponding foot position sensing capacitor 26. The entropic echinoid is useful in high temperature environments for motors, actuators, bearings and clutches.

Abstract: A reactor for producing hot hydrogen in vacuo which in turn drives a power-generating device such as a turbine is disclosed. Within the reactor are injected heat-generating reactants such as beryllium and oxygen. The reactants heat hydrogen which in turn is delivered to a power-generating device such as a turbine.

Abstract: An avionics display device having a stowable rotatable locking handle disposed therein for facilitating quick and easy installation and/or removal of the display device.

Abstract: Method and apparatus for vapor phase free methyl radical transport of indium dopant species for precise predetermined reproducible doping concentrations to control electrical properties for MOCVD grown materials.

Abstract: A Q multiplier circuit which is automatically feedback stabilized through the use of phase and gain control loops and thereby adapted for use as an amplifier and filter. In a typical embodiment, a variable gain amplifier and band pass filter are provided in a forward signal path while a phase shifter is provided in a feedback signal path. The output of the circuit is sampled and compared to a fixed reference in order to generate a gain control signal for application to the variable gain amplifier. The input signal on the forward signal path is sampled along with the signal on the feedback signal path and the phases of these samples are compared in order to generate a phase control signal for application to the phase shifter. The variable gain amplifier is controlled to maintain a predetermined power output level while the phase shifter is controlled to maintain positive feed back.