Abstract: Phosphors are coated and deaggregated by treatment with ultrasonic energy during the coating step. The phosphor aqueous dispersion is continuously passed through an ultrasonic chamber at a rate of flow so as to prevent aggregated phosphor particles from settling out and avoiding deaggregation.
Abstract: A power conversion system is constructed of a plurality of identical Stirling engine modules paired off in opposed, aligned relation with their respective expansion spaces in juxtaposition. Two engine module pairs are arranged in a common plane and in mutually perpendicular relation to create a module group, with plural such module groups stacked together to provide an expanded, self-balanced system with all the modules sharing a common, centrally located thermal energy source. Each module includes a pair of compression positions operating on a common axis intersecting the displacer cylinder axis at right angles. Heat exchangers, either tubes or heat pipes, are disposed within the expansion space to transfer heat from the source to the working fluid therein, thus providing a more idealized Stirling engine cycle.
April 21, 1986
Date of Patent:
February 9, 1988
Dilip K. Darooka, Robert W. Drummond, Jr.
Abstract: The memory cell is a five transistor cell formed with complementary symmetry metal oxide (CMOS) semiconductor insulated gate field effect transistors (IGFETs) in the silicon-on-sapphire (SOS) technology with doped polycrystalline interconnects using buried contacts. Diodes are formed where doped polycrystalline silicon lines form buried contacts to underlying silicon epitaxial regions of opposite conductivity type and where silicon epitaxial regions of opposite conductivity type contact one another. The presence of these diodes has been shown by the inventor to not be detrimental to the operation of the memory cell.
Abstract: A method for forming a layer of silicon dioxide over a silicon island on an insulating surface wherein the layer on top of the island is thinner than on the sidewalls is disclosed. The silicon island is oxidized and a silicon layer is deposited thereover. The layer of silicon is oxidized and the oxide layer is anisotropically etched until the top surface of the island is exposed, leaving oxide only on the sidewalls of the island. The exposed portion of the island is then oxidized to form a thin layer of gate oxide thereon. A conductive polycrystalline silicon electrode is deposited on the oxide-covered island. The disclosed method is particularly useful in the formation of MOSFETs.
Abstract: A load lock chamber is secured to a Rutherford Backscattering Spectrometer in communication with the spectrometer chamber. A valve separates the two chambers. A specimen manipulator transfers a specimen attached to a transfer member to a specimen support in the spectrometer chamber. The transfer member is releasably attached to the manipulator and to the specimen support for simplifying transfer of the specimen. The vacuum of the spectrometer is always maintained by evacuating the load lock chamber before transfer of the specimen in and out of the spectrometer chamber.
Abstract: A phase-locked laser array comprises a substrate with two spaced-apart pluralities of channels extending towards different reflecting surfaces of the array. The axes of symmetry of the channels of one plurality are offset from the axes of symmetry of the channels of the second plurality. Coupling of light propagating in the optical waveguides over one plurality of channels into the waveguides over the second plurality of channels induces a zero phase difference between the laser oscillations of adjacent channels.
Abstract: A system for aligning and packing substantially flat objects moving on a conveyor line in irregularly spaced and, nonaligned rows includes a mechanism for separating the rows and aligning the objects and also for feeding the aligned objects onto another conveyor. A packing mechanism transfers the aligned objects from a loading area to a container. An additional device places a strip of protective material on top of the layer of objects. A moving means vertically moves the container a distance substantially equal to the thickness of the object being packed in preparation for the reception of an additional layer of objects. Another transfer device moves the filled container from the loading area and replaces it with an empty container. Another transfer moves the filled container to provide room for the next container and an additional device transfers a supply of empty containers in preparation for another container being placed in the loading area.
Abstract: When a positive or a negative overflow error condition is encountered, the present invention substitutes the most positive or most negative value for the erroneous sample. The sign bit of a potentially erroneous value is inverted to form the MSB of the substitute value, and this value is, in turn, inverted and expanded to form the n-l LSB's of the substitute value. If an overflow error condition is detected, the erroneous value is replaced by the substitute value.
Abstract: A memory-based television receiver includes an apparatus for generating a composite sync signal CSS for timing the memory reading operation and the deflection circuits of the receiver. The horizontal sync components of the internally-generated composite sync signal are locked to the system clock. The vertical sync components of the internally-generated composite sync signal are, on the other hand, locked to the vertical sync components of the incoming video signal.
Abstract: The present invention provides three embodiments of circuitry, responsive to the application of an energizing pulse to the high pressure tube of a hybrid laser, for de-energizing the normally continuously energized low-pressure tube of the hybrid laser for only a given time interval which is longer than the duration of the high-energy pulse of coherent wave energy generated by the high pressure tube when energized. This solves a prior-art problem of sporadic spike emissions by the low-pressure tube during the time interval in which echoes from objects of interest are being received by a LIDAR employing a hybrid laser transmitter portion.
Abstract: The invention is an improved arrangement for illuminating a liquid crystal cell which provides a significant increase in the range of viewing angles in a plane orthogonal to the principal viewing plane which is defined as the plane containing the director at the midpoint of the liquid crystal and the normal to the light entry surface. The improvement comprises means for illuminating the cell having a substantially collimated beam in the orthogonal plane. Preferably, the thickness of the liquid crystal in the cell corresponds to the first Gooch-Tarry minimum. The invention is also a method for providing a wide angle for a liquid crystal display comprising the step of illuminating a liquid crystal cell with a beam of light which is substantially collimated in the principal viewing plane and which is substantially uncollimated in an orthogonal plane.
Abstract: An electrically regeneratable fuel cell is disclosed which has positive electrodes comprised of an alloy of about 50 to 55 percent by weight of silver and about 50 to 45 percent by weight of indium. The fuel cell of this invention is chargeable to a higher voltage at a lower pressure, has a substantially higher capacity, lower internal resistance and is lighter in weight than comparable conventional electrically regeneratable fuel cells.
Abstract: A pair of fingers are operated by air cylinders at different rates in accordance with a given wiring function. In one function, one finger engages, supports and aligns an IDT at low pressure prior to insertion of the wire by the other finger at high pressure. The opening and closing of the fingers is also at high pressure. The closing of the fingers captivates the wire in alignment therewith as the tool travels from terminal to terminal. The wire is severed from the last terminal in the wiring sequence by an air operated knife. The tool is adapted to be connected to a robotic arm.
Abstract: A support fixture for a printed circuit board connector having L-shaped wire wrapping pins attached to a printed circuit board includes a plurality of L-shaped elements, each for placement in the L-shaped space defined by adjacent arrays of pins, connector body and printed circuit board. An outer L-shaped structure is juxtaposed with the pins at their bends and with the elements to preclude motion of the pins at their bends in response to wire wrapping forces on the ends of the pins protruding from the printed circuit board.
Abstract: A method for holding a cathode-ray tube in a fixed position during processing utilizes mounting lugs attached to the tube. The apparatus includes a platform having a plurality of legs positioned to support, respectively, the ends of the mounting lugs. Each of the legs has a recess therein aligned with an aperture in the respective lug end. Each lug is secured to the respective leg by a clamp, pivotally attached to each leg, which projects through the aperture into the respective recess when pivoted.
Abstract: An apparatus for forming a shadow mask from a mask blank includes a punch having a convex surface, a pad having a complementary concave surface, and upper and lower dies having openings therein for receiving the punch and the pad, respectively. Each die also has a complementary nonplanar surface adjacent the opening for clamping the mask blank. Each die surface has a surface contour that substantially matches the extended surface contour of the mask blank when the mask blank lies against the inner edge of the lower die surface, so that wrinkling does not occur when the mask blank is clamped between the upper and lower dies.
Abstract: A novel electron gun for a cathode-ray tube includes at least one and preferably three cathode assemblies and at least four successive electrodes longitudinally spaced from the cathode assemblies. Each of the electrodes has at least one and preferably three electron beam apertures therethrough. The cathode assemblies and two of the electrodes are attached to a ceramic support member which is the sole supporting interconnection therebetween. A third electrode of the four successive electrodes has a distal electrode member and a proximal electrode member. The proximal member also is attached to the ceramic support member to form a first gun module. A second gun module includes a fourth electrode of the four successive electrodes which is in spaced relation to the distal member of the third electrode. The fourth electrode and the distal member of the third electrode are interconnected by a pair of insulative spacers.
Abstract: A first measuring contact is displaced along a gauge distance measuring axis to measure the distance to a second reference contact. Both contacts pivot about axes that lie on the gauge measuring axis and on the respective contact surfaces. When the contacts abut, the pivot axes are coextensive. Both contacts can engage a contoured wall regardless its angle to the gauge measuring axis and accurately measure the wall thickness along the gauge measuring axis.
Abstract: An apparatus for testing the crosspoints of an RF switching matrix injects a test signal having the characteristics of noise into the matrix. The test signal recovered from the matrix is mixed with a frequency-swept signal and the difference signal is applied to a bandpass filter. The filter provides a window through which all of the frequency-shifted components of the recovered signal pass during the period of the frequency-swept signal. The total energy of the components in the window is continually monitored during the sweep period. A comb generator provides the test signal having a multiplicity of substantially equal amplitude components, uniformly spaced over a selected frequency spectrum. The frequency-swept signal is provided by a VCO having a sawtooth waveform input voltage. The amplitudes of the test signal components are sufficiently low that if coupling occurs between the test signal and a configured external antenna, the resulting transmission is virtually indistinguishable from noise.
Abstract: A jaw is secured to a stem member having a T-shaped slot through which a pair of spaced pins pass. When the jaw and member are displaced from a clamp position to a neutral position, one of the pins is aligned with the T portion of the slot and the other pin is seated at one end of the main slot. The member tilts automatically to a retracted state in response to a spring force in a given direction. When the member is rotated from the retracted state to the neutral position the same spring force slides the jaw into the clamp position. A resilient projection on the stem member automatically engages a workpiece when the member reaches the neutral position to locate the workpiece prior to clamping.