Abstract: A communications network grid having a matrix of nodes at which transmitters or receivers are connected to transmit and receive signals from any origin or destination. Each node utilizes first come only served control logic to retransmit the first received signal.

Abstract: A Compton x-ray backscatter gage apparatus directing x-rays from an isotopic radiation source to a region of interest in a composite structure to monitor structural integrity. The backscattered x-rays from the region of interest are directed by guides in the gage housing to radiation detectors.

Abstract: A cluster ion synthesis process utilizing a containerless environment to grow in a succession of steps cluster ions of large mass and well defined distribution. The cluster ion growth proceeds in a continuous manner in a plurality of growth chambers which have virtually unlimited storage times and capacities.

Abstract: A radar capability display apparatus utilizing radar theory equations which are stored in a computer to relate the measured characteristics of interference signals in radar return echoes to determine the amount of radar performance degradation that the interference signals create. These loss of performance factors which are obtained at each antenna beam angle and range, are displayed on the radar's screen as the radar capability display.

Abstract: A split two-phase CCD clocking gate apparatus utilizing first and second phase regions for the storage and transfer of charge and a virtual phase region which is at a constant potential and separates the first and second phase regions.

Abstract: A high power, high voltage linear field effect transistor amplifier apparatus utilizing an automatic gate biasing network to normalize the gate threshold voltages of a plurality of field effect transistors which are in either series or parallel. Thus, these series or parallel combinations of field effect transistors may be operated as linear devices. A high-voltage, high power, wide-band carrier controlled linear amplifier is provided by utilizing an oscillator as a driver.

Abstract: A liftoff suppression apparatus utilizing a liftoff sensing coil to sense the amount a ferromagnetic resonance probe lifts off the test surface during flaw detection and utilizing the liftoff signal to modulate the probe's field modulating coil to suppress the liftoff effects.

Abstract: A test box apparatus utilizing a plurality of test point jacks to provide access for monitoring points within the circuit of the unit or card under test. The test box apparatus also utilizing a plurality of switching circuits which are arranged to provide a variety of signals that may be connected into various points in the unit or card under test and thereby isolate malfunctions within the test unit.

Abstract: A three-wire static strain gage apparatus utilizing a switching unit in combination with a Wheatstone bridge circuit to make strain gage measurements which are temperature corrected by switching to a temperature gage to measure the strain gage circuit's temperature at the time of the strain measurement.

Abstract: A pulsed radiation dosimetry apparatus utilizing a pin diode to detect pulsed radiation that may be produced by either a particle accelerator or a flash x-ray device. The detected radiation signal is integrated and then directly displayed on a digital meter. The present apparatus provides a direct readout of radiation dose in rads.

Abstract: A digital voice conferencing apparatus utilizing a time division multiplex system to process data packets from and to the participants of the conference call. The subscribers and the conference call originator utilize a time division multiplex (TDM) adapter to establish a conference call mode, to identify the members thereto, and to provide all the means for transmitting and receiving the voice packets to the conference members excepting each members own voice packet. A digital voice conferencing apparatus is located at each subscriber location and permits all subscribers who may be talking simultaneously to be understood.

Abstract: Coherent microwave radiation is generated in and transmitted through a waveguide/drift tube by means of an injected relativistic electron beam the parameters of which, in combination with the waveguide/drift tube geometry and dimensions effect a virtual cathode oscillation condition within the waveguide/drift tube. Tuning of the device is accomplished by manipulation of the relativistic electron beam parameters and/or waveguide/drift tube physical dimensions.

Abstract: An integrated circuit test analysis apparatus for visually interpreting voltage changes of active circuit components uses the electro-optic display effect of circuit electric field upon the liquid crystal layer which is applied over the circuit being tested. The normal state duty cycles in a repeating sequence of test states of the integrated circuit is modified by causing the integrated circuit to pause or maintain a particular state at one or more specific time periods for a predetermined time interval to permit the display to be recorded.

Abstract: An amplifier-oscillator frequency multiplier apparatus utilizing a pair of servo-connected amplifiers which are electronically switchable to provide either a coherent amplifier or a non-coherent oscillator.

Abstract: The method of manufacture and use of a magnetic field sensitivity indicator apparatus for evaluating magnetic fields applied to ferromagnetic material parts during magnetic particle inspection utilizing known defect indicators to establish the strength and direction of magnetic fields in the parts under test.

Abstract: A flexible wiring bridge apparatus for integrated circuits providing circuit modifications of a semi-permanent nature.

Abstract: An amplitude control apparatus utilizing an oscillator with an amplitude regulation loop to provide positive feedback to the oscillator and thereby providing zero amplitude error.

Abstract: A hearing threshold level measuring apparatus for automatically determining testing hearing level in each ear and processing the test scores for either manual or automatic readout. A predetermined number of tone bursts varied randomly from one to four in each test sequence and automatically decreased in level. The subject is provided with a response panel containing pushbuttons labelled one through four. The subject's bearing threshold is then determined from his pushbutton responses to his correct burst tone counts.

Abstract: The microprocessor-controlled RF modulator apparatus will provide repeatable, controlled scintillation on a test bench generated low-power RF target waveforms for the purpose of providing a target returns with realistic radar cross section characteristics during testing of the F-16 (or any other) fire control radar. The microprocessor-controlled RF modulator apparatus is utilized in line between an RF target signal generator and the target horn to provide a variety of target situations for testing radar hardware and software.

Abstract: A nonlinear second order signal processing apparatus having a number of high quality optical fibers that are embedded in a nonlinear optical material in such a way that their cores are in evanescent contact with one another and the nonlinear medium.