Abstract: A device for sorting cylindrical work pieces having an axial flat comprising a vibrating track for transporting the pieces and a gate mounted over and across the track. The gate has an inverted V-shaped cut-out on its lower edge. The height of the cut-out allows the pieces resting on their axial flat to go through the gate and to stop the ones resting on part of their periphery other than the flat. The invention is particularly useful for sorting video and audio styli.
Abstract: A system is provided for determining the widths and spacings of substantially parallel opaque stripes on a substrate, wherein the stripes are separated by openings. The system comprises a light source for illuminating the substrate and photodetecting means positioned to receive light from the illuminated substrate. Means are included for scanning the photodetecting means transverse to the stripes and for sweeping the photodetecting means in a direction substantially parallel to the stripes. The system further includes means for converting the output of the photodetecting means into a quantized signal, means for dividing the quantized signal into separate signals representing stripe widths and opening widths between stripes, and means for converting the stripe width and opening width signals into a signal representing center-to-center spacing between openings.
September 4, 1979
Date of Patent:
February 12, 1985
Peter D. Southgate, David W. Fairbanks, Richard B. Davis, John P. Beltz
Abstract: A photoelectric circuit arrangement includes one direct current voltage source and first and second photoconductive networks, each comprising at least one resistance and one photoconductive cell. An output voltage generated between two output terminals of the first and second networks is directly applied to a bimorph element used to close or open a blind. The strong light causes the networks to be in low resistive state so as to produce the output voltage of one polarity to bend the bimorph in one direction and thereby to tend to close the blind, while the weak light causes the networks to be in high resistive state so as to produce the output voltage of the other polarity to bend the bimorph in the opposite direction and thereby to tend to open the blind. The first and second photoconductive networks can be integrated in one body.
Abstract: A rotative motor includes a member mounted to rotate freely. A pair of triangular piezoelectric bimorph elements are excited from a source of alternating current so that free tip ends of the respective elements vibrate ninety degrees out of phase. The central point of an elastic member connected between the free ends of the elements is in frictional contact with the rotatable member. The central point exhibits a closed loop path, imparting a rotary motion to the rotatable member.
Abstract: A rotative motor includes a member mounted to rotate freely. A plurality of piezoelectric bimorph elements are radially secured at one end to a support in a two-staged shape comprising upper and lower arrays of the elements. A plurality of elastic members connect the free end of each one of the upper elements with the free end of a different one of the lower elements. Each pair of inter-connected elements is excited from a source of alternating current so that the free ends of the respective elements vibrate ninety degrees out of phase. The central point of each elastic member connected between the free ends of the one upper and one lower elements is in frictional contact with the rotatable member. The central point of each elastic member exhibits a closed loop path, imparting a rotary motion to the rotatable member.
Abstract: A color picture tube has an inline electron gun for generating and directing three electron beams, comprising a center beam and two outer beams, along coplanar paths toward a screen of said tube. The three beams pass through a deflection zone adapted to have vertical and horizontal magnetic deflection fields established therein. The improvement comprises the inclusion of first means for weakening the effect of a portion of the horizontal magnetic deflection field on the center electron beam. Such means include elongated magnetic members located between the outer beams and the center beam with the direction of elongation being perpendicular to the plane of the electron beam paths. Also included are second means for weakening the effect of portions of both deflection fields on the two outer beams. The second means includes magnetic shield members completely surrounding each of the outer beam paths.
Abstract: A photomultiplier tube comprises an evacuated envelope having a photoemissive cathode formed on an interior surface of the envelope. An evaporator support assembly is attached to a dynode assembly in such a manner as to align and precisely locate the dynode assembly with respect to the interior wall surface of the tube. The evaporator support assembly provides a structure for attaching an alkali source within the tube in a manner which guarantees mechanical and electrical reproducibility. The evaporator support structure also includes a structure for making contact to the photocathode of the tube.
Abstract: An electron gun includes two electrodes between which a resistive lens structure is mounted. The lens structure comprises a stack of alternate apertured electrode plates and insulator spacer blocks. A high resistance coating of, e.g., cermet or glaze material, is disposed along one side of the stack so that it contacts a side of each spacer block and an edge of each apertured electrode plate.
Abstract: A film of photoemissive material, such as antimony, is vaporized from a platinum-antimony source onto a substrate in an enclosure. The source is preferably a plurality of beads formed by attaching substantially spherical particles of platinum-antimony (50--50 by atomic volume) to a platinum-clad molybdenum wire. The spherical particles are accurately sized so that each bead comprises substantially the same amount of antimony. The beads are symmetrically arranged about the substrate so that upon evaporation a substantially uniform film of photoemissive material is deposited on the substrate.
Abstract: A piezoelectric, acoustic vibration detecting element is positioned in a fluid flow to be measured so as to be moved according to the intensity of the fluid flow away from a source of acoustic vibration. As the distance between the acoustic vibration source and the element increases with increasing fluid flow intensity, reducing the acoustic pressure on the element, the magnitude of an electrical output signal produced by the element decreases providing a detectable measurement of the change in the fluid flow intensity.
Abstract: An electron gun includes an electron beam source and at least two spaced apart successive electrodes. The successive electrodes are individually attached to, spaced from, and disposed concentric with and substantially within a ceramic cylinder. A resistive coating is uniformly disposed on at least an interior wall surface of the ceramic cylinder.
Abstract: The inspection system detects defects in regular patterns wherein the elements of the patterns may have variations in period. In the system a camera, having a photoelectric sensor therein, is mechanically moved to permit the sensor to scan and detect the elements of a pattern. The system includes circuitry for processing the output of the sensor. The circuitry includes portions for quantizing the sensor output signal, for storing the quantized signal of a portion of a scan, for determining element period from the quanitized signal and for controlling the output of the storage portion at times related to element period. The circuitry also includes portions for correlating the output from the storing portion with a real time quantized signal of the same scan and for indicating the presence of an error related to a pattern defect in response to a miscorrelation signal from the correlating portion.
Abstract: A rotative motor includes a member mounted to rotate freely. A pair of piezoelectric bimorph elements are excited from a source of alternating current so that free ends of the respective elements vibrate ninety degrees out of phase. The central point of an elastic member connected between the free ends of the elements is in frictional contact with the rotatable member. The central point exhibits a physical displacement circular in shape, imparting a rotary motion to the rotatable member.
Abstract: A beam guide assembly for a flat panel display device includes a plurality of meshes arranged in a spaced parallel relationship. Insulative supports permanently retain the meshes in the spaced relationship. The supports preferably comprises glass rods or beads spaced along the length of the assembly with portions of the meshes embedded therein. The beads are transversely displaced to allow beads of adjacent assemblies to be interleaved in a common aligned column. The beam guide assemblies can readily be fabricated and assembled using automatic and mass production techniques.
Abstract: An enhancer for enhancing the horizontal deflection of an electron beam in a kinescope includes a quadrupole deflector. The quadrupole deflector is orientated so that the convergent action occurs in the same plane as the horizontal deflection. The divergent action is substantially decreased by utilizing additional members to shunt out the magnetic field which causes the divergent action.
Abstract: A method for checking for electrical frit breakdown in kinescopes uses a novel probe which is dimensioned to enter into the neck of the kinescopes without contacting the interior of the neck. A movable electrical contact is actuated to a position against the conductive coating on the inside of the tube. A high voltage supply is connected between the movable contact and the frit seal and current flow indicates an electrical frit seal breakdown.
July 21, 1980
Date of Patent:
May 11, 1982
Gerald M. Allaroyce, Ronald N. Moskalczak, Edward A. Gronka
Abstract: An envelope for a flat panel display device is comprised of two portions which respectively include a baseplate and a faceplate held in a spaced parallel relationship by a plurality of side walls. A plurality of support walls supports the envelope against collapse from atmospheric pressure. Differences in the heights of the side walls and support walls are compensated for by a flexible seal which extends around the periphery of the envelope so that the faceplate and baseplate and side walls are coupled through the flexible seal.
Abstract: In a kinescope a pair of curved plates cooperate with the conductive coating inside the tube funnel to form electrostatic lens. The lens is shaped by the curve of the plates to eliminate convergence of the electron beams as they enter the field of the lens to enhance the horizontal deflection of the kinescope. The internal focusing and defocusing actions of the quadrupole are suppressed within the quadrupole, but a vertical divergent field outside the quadrupole substantially enhances the vertical deflection.
Abstract: In a flat panel display device a beam guide assembly includes electron guide meshes, a focus mesh and an acceleration mesh, which are retained in a spaced parallel relationship by insulative posts. Modulation electrodes, within an electron gun section of the display device, are extended toward the guide meshes so that the guide meshes and the modulation electrode partially overlap in a spaced parallel relationship. The focus and acceleration meshes are extended toward the gun section to partially overlap the modulation electrodes in a spaced parallel relationship. Insulative posts are arranged along the extended portions to retain the spaced parallel relationships of the electrodes and the meshes. A cathode support is held by the insulative posts and supports a cathode within the gun section in the desired location and orientation with respect to the guide meshes. A unitized beam guide/electron gun assembly is thus achieved.
Abstract: An electron gun comprises an astigmatic beam forming means including a cathode, a control grid, a first screen grid electrode having a horizontally elongated rectangular aperture, and a second screen grid electrode having a circular aperture. In operation, the second screen grid is energized with a DC bias voltage and the control grid and first screen grid is energized with a DC bias superposed with a substantially parabolically shaped dynamic signal synchronized with either or both the horizontal and vertical deflection signals. Thus, the astigmatic optics of the beam forming means varies in strength in phase with the beam scan so as to provide optimum correction for flare distortion of the electron beam.