Abstract: An optical system focuses a portion of electromagnetic energy into a spot on a focal plane and rotates the focused spot about an optic axis. A plurality of detectors is disposed in a detector plane. The array of detectors is arranged in a plurality of sets of such detectors. Each one of such sets of detectors is disposed along a different region extending radially from a central region of the array. When the detector and focal planes are skewed, a processor processes signals produced by a selected one of the plurality of sets of detectors. The selected one of the sets is the set disposed in one of the radially extending regions disposed along, or adjacent to, a line formed by the intersection of the skewed detector and focal planes.

Abstract: An RF limiter circuit having an input terminal and an output terminal includes an RF propagation network having a first end coupled to the input terminal of the circuit and a second end coupled to the output terminal of the circuit. The RF limiter circuit further includes a plurality of diodes, each diode having an anode and a cathode with the anode of a first one of the diodes coupled to the RF propagation network and the cathode of a second one of the diodes coupled to the RF propagation network. The limiter circuit further includes a bias network for distributing a reverse bias voltage across each of the plurality of diodes and for providing a DC voltage on said RF propagation network.

Abstract: An optical beam steering device for use in a single-aperture laser transceiver system provides deflection of the transmitted and received beam in two planes, while maintaining the distinctive identities, of each channel respective to their polarizations. The invention utilizes four single-dimensional beam deflecting devices, two for each orthogonal linear polarization of the two transceiver channels, one of these for each steering axis. In addition, a 90.degree. polarization rotator and a quarter-wave plate are included in the arrangement of beam deflecting devices to satisfy the polarization requirements of these devices and of the transceiver channels.

Abstract: A mixer having a diode pair which includes a first RF propagation network having a first end coupled to a first terminal of the mixer and a second end coupled to a first electrode of the diode pair. The mixer further includes a first means, coupled to the first RF propagation network for providing a low impedance DC signal path to ground and for providing a high impedance signal path to signals propagating at a first radio frequency (RF) frequency. A first transmission line resonator is coupled to the first RF propagation network and has an electrical pathlength which is one quarter of a wavelength at a second RF frequency. The mixer further includes a second RF propagation network having a first end coupled to a second terminal of the mixer and a second end of the RF propagation network coupled to a second electrode of the diode pair.

Abstract: Articles of polycrystalline zinc sulfide and zinc selenide achieve substantially improved optical quality by a treatment of heat and isostatic pressure by means of an inert working fluid. The treated specimens are transparent and have substantial transmission in the infrared and visible range of the spectrum. Additional improvement in the transmission characteristics is achieved by wrapping the specimens in a foil of an inert material prior to treatment.

Abstract: An antenna capable of being mounted flush with variously shaped surfaces. The antenna comprises a dielectric filled radiating cavity with two opposing tapered walls. The radiating cavity is excited by a microstrip horn.

Abstract: A SAW stabilized oscillator includes a phase locking circuit which is phase locked to a lower frequency reference signal having an odd order difference with respect to the fundamental frequency of the SAW oscillator. A mixer is disposed in the phase locking circuitry and is used as a sub-harmonic phase detector by mixing the fundamental with an odd harmonic of the reference signal.

Abstract: A spread spectrum signal detector for sampling a modulated carrier employing a zero-crossing detection means having two independent control loops, a first loop for a zero-mean threshold control and a second loop for AGC control. An IF sampler quantizeds the received spread spectrum signals at IF and provides high immunity to interference or jamming. The IF signal is sampled at a number of quarter cycle intervals to allow sampling in sequence of the in-phase (I) and quadrature-phase (Q) components. The output of the IF sampler is two bits, a sign bit and a magnitude bit. The zero-man threshold control loop using only the sign bit of the I and Q samples sets a threshold level (T0) to detect the zero-crossings of a received waveform. Two magnitude threshold levels are set at fixed offsets from the T0 threshold level.

Abstract: An optical element includes a base layer of a first material selected from the group consisting of gallium arsenide, gallium phosphide, cadmium telluride, mercury cadmium telluride, zinc sulfide and zinc selenide, and a coating layer of the selected base layer material. The coating layer has a predetermined degree of intrinsic compressive stress to protect the base layer.

Abstract: A display having as a light source thereof an electron tube. The electron tube has disposed in an evacuated envelope thereof a plurality of cathode means, each one thereof adapted to emit electrons in response to a control signal. A plurality of sets of at least one cathodoluminescent stripe is disposed within the envelope. Each one of said sets is associated with a corresponding one of the cathode means and adapted to emit light with a predetermined one of a set of primary colors in response to electrons emitted by the corresponding cathode means striking such stripe. An anode for collecting electrons emitted by said cathode is also disposed within the evacuated envelope.

Abstract: A time delay fuze is shown to include a fuze base having an outer surface with a circular shape and a center cavity with an inner wall having a plurality of bores disposed through the inner wall to the outer surface. The time delay fuze further includes a plurality of encoder rings disposed about the fuze base, each one of the encoder rings having an inner surface with a predetermined arrangement of lands and grooves, the inner surface of each one of the encoder rings disposed adjacent the outer surface of the fuze base and a circuit board having a plurality of switches disposed in the center cavity of the fuze base.

Abstract: A washing machine includes a mid-level pivot and traverse suspension arrangement and a modular assembly. A support having a central aperture is spaced from the washing machine base by a plurality of upstanding legs. The modular assembly, including a drain tub, a drive shaft, and a transmission, is disposed on the support with the drive shaft and the transmission extending through the central aperture of the support. The modular assembly is a disengageable intact from the support with the transmission and the drive shaft passing through the central aperture of the support.

Abstract: A pseudo-random or transient synthesized signal is provided by analysis of a plurality of related signals by vector quantization of linear predictive coding coefficients (cluster representatives) of time blocks of the signals and providing cumulative probability matrices for the transition from one cluster representative for one block to a cluster representative of the next successive block of each of the signals. Synthesis of the pseudo-random signal is provided by randomly selecting according to a cumulative transition probability, the cluster representative of a next successive block given the selected cluster representative of the previous block, the coefficient of each block time being applied to a noise-excited recursive filter to generate the pseudo-random synthesized signal. Synthesis includes probabalistic models using Markov transitions, to produce transient sounds such as sonar, hatch closings, and hull groans.

Abstract: A washing machine having a mid-level pivot and traverse suspension system. The washing machine includes a tub assembly disposed over a support, with the assembly having a center of mass disposed at approximately the same axial position as the typical out-of-balance load. The pivoting force is a function of the distance between the center of mass of the tub assembly and the out-of-balance load. Thus, the pivoting forces are reduced, as well as the corresponding reaction forces transferred to the floor.

Abstract: A method and apparatus for reporting faults on a control line running through a plurality of processors to a control processor. Each processor having a failure provides a unique address onto the control line. The addresses are then sequentially shifted through each of the processors having a failure to the control processor.

Abstract: An apparatus and method for pseudo-random noise (PN) code correlation in a GPS receiver employing sign and magnitude input weighting for each of the in-phase (I) and quadrature-phase (Q) samples of a received PN-code modulated carrier. A programmable R factor provides input A/D sample sign and magnitude weighting control of outside crossing samples for interference rejection of other RF signals interfering with the received PN-code modulated RF carrier. The R factor weighting determines if the A/D samples are from a linear or adaptive A/D converter. In-phase reference (IREF) signals and quadrature-phase reference (QREF) signals, produced by an internally generated PN-code reference, are provided to a plurality of I and Q multi-Y-tap correlator/integrators for correlation with the I and Q samples. The apparatus correlates I and Q samples obtained from IF sampling or baseband sampling of the received PN-code modulated carrier.

Abstract: A method of securing an object into a shell is disclosed. According to the method, countersink holes are drilled into the object. The object is inserted in the shell and the shell is deformed into the countersink holes to form dimples.

Abstract: A clothes dryer door assembly adapted for mounting in alternate positions so that the door assembly can be made to open from either side. The door assembly includes an outer panel to which a handle, latching mechanism, and hinges are mounted, and inner liner having a bowed out lower portion forming an internal chamber through which air is exhausted to a lint filter. In reversing the mounting side, the inner liner is first disconnected from the door panel and then reconnected after the door panel has been inverted. Thus, the hinges, handle, and latching mechanism of the door panel are relocated for mounting to the opposite side of the access opening of the dryer cabinet, but the lower portion of the liner remains on the bottom.

Abstract: A retainer sleeve having a cylindrically curved wall of resilient material spaced radially from its longitudinal centerline for defining a tapered leading end portion, a midportion and an opposing trailing end portion of the sleeve. The defining wall has extended through its thickness a longitudinally coextensive first opening with an open end portion in the trailing end portion of the sleeve disposed in opposing relationship with a hinge portion of the wall. The hinge portion terminates in a closed end of a longitudinal second opening in the wall having an opposing open end portion disposed in diametric opposing relationship with an opposing open end portion of the first opening in the leading end portion of the sleeve. Thus, the first and second openings form therebetween first and second opposing flexible legs which have in the midportion of the sleeve respective proximal end portions.

Abstract: An adaptive distortion cancellation algorithm minimizes intersymbol interference (ISI) when demodulating signals in the presence of distortion over fading and dispersive channels. The algorithm computes preliminary estimates of received data and feeds them to a canceller structure. The canceller checks the preliminary estimates and then makes a series of subsequent estimates by modifying the elements of the original received estimated data sequence. Each estimate generates a distortion cancellation quantity which is added to the received data estimate to generate a sequence of values; a final decision is determined by that subsequent estimate which is closest to an ideal state. The preliminary estimates are made using a conventional transversal filter whose coefficients are controlled by one of the existing filter tap algorithms.