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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7132026 | Method for manufacturing image display device By a method for manufacturing a flat image display device having a plate spacer, even if the center of the plate spacer is displaced from its initial assembly position, it can easily be corrected to the initial assembly position again, allowing stable production of ... | 11/07/2006 |
| 7045976 | High definition electron gun for cathode ray tube Electron gun for cathode ray tube comprising aligned in series along an axis XX′ an electron-emitting cathode K, electrodes G1 and G2 for the formation of an electron beam, a prefocusing electron lens G3, G4, G5, a first quadripo... | 05/16/2006 |
| 6922011 | Deflection system for cathode ray tubes The present invention relates to a display device comprising a cathode ray index tube (1) having a neck portion (1″) and a screen portion (1). The display device comprises an electron gun assembly (3) for generating a plurality of elect... | 07/26/2005 |
| 6917148 | Oxide cathode for an electron gun, having a denser and thinner emissive zone Cathode comprising a substrate (2) supporting a cathode emissive coating, comprising what is called an emissive central zone (12) and what is called a nonemissive peripheral zone (11); according to the invention: | 07/12/2005 |
| 6864625 | Color pixel element cathode ray tube Color CRTs, used in large display screens, have a plurality of three color electron beams that are strongly focused so that they crossover and become divergent in both the X and Y axes if the CTR's face. The strength of the focusing determines the size of the illumi... | 03/08/2005 |
| 6803715 | Electron beam apparatus A spacer, which is an atmospheric pressure resistant structure for a vacuum container, can be easily assembled, and the manufacturing costs that accompany the installation of the spacer are reduced. A rear plate, which includes a substrate on which electron-emitting... | 10/12/2004 |
| 6794807 | Electron gun for cathode ray tube An electron gun for a cathode ray tube includes a single cathode that emits thermions; first and second electrodes; a plurality of focus electrodes provided consecutively after the second electrode; an anode electrode mounted after a final focus electrode; and a sup... | 09/21/2004 |
| 6664545 | Gate for modulating beam of charged particles and method for making same Bradbury-Nielson gates for the modulation of beams of charged particles, particularly ion beams in mass spectrometry, have been produced with an adjustable wire spacing down to 0.075 mm or a smaller spacing. The gates are robust, they can be fabricated in... | 12/16/2003 |
| 6340859 | Cold cathode electron emission device for activating electron emission using external electric field A cold cathode electron emission device activating electron emission applying an external electric field is provided, in which an inversion layer inverting the type of a semiconductor layer by an external electric field is generated to form a shallow chan... | 01/22/2002 |
| 6294865 | Display device having a cathode ray tube Display device having an in-line electron gun with a main lens, in which the anode voltage ranges between 16 and 22 kVolt and the parameter Va0.5.p.sup.3/2 is greater than 50 kVolt0.5 mm3/2. A reduction of the t... | 09/25/2001 |
| 5969471 | Grid assembly for cathode-ray tubes and method of making A one-piece grid assembly for use in an electron gun for a miniature cathode-ray tube application that consists of a core made of an electrically insulating material, a first grid deposited on the core, and a second grid deposited on the core that is spac... | 10/19/1999 |
| 5959395 | Cathode for electron tube A cathode for an electron tube formed by coating the base of the cathode for the electron tube with an alkaline-earth metal carbonate containing at least barium as the alkaline-earth metal, and thermally decomposing in a vacuum to generate an emitter main... | 09/28/1999 |
| 5955829 | Cathode for electron gun with band-shaped beams Electron gun with band-shaped beams that includes a vacuum chamber extend in a longitudinal direction, a beam window running in the longitudinal direction along the vacuum chamber, and a cathode control-electrode system positioned within the vacuum chamb... | 09/21/1999 |
| 5825435 | Color cathrode ray tube and display device By selecting the number of apertures per vertical row in the shadow mask of a color cathode ray tube to be in the range between 615 and 650, such a cathode ray tube can be used both in a PAL, an NTSC system and a MUSE system without the occurrence of dist... | 10/20/1998 |
| 5793448 | Cathode ray tube packages A cathode ray tube package includes a cathode ray tube assembly and a housing assembly including a deflection coil and/or at least one focus coil. The cathode ray tube assembly includes a collar (31) aligned with the electron beam, being arranged to mate ... | 08/11/1998 |
| 5585691 | Electron beam generation and control for dynamic color separation A dynamic color separation display CRT having an electron beam forming structure for beam generation and electrostatic impingement control. The electron gun forms a group of electron beams and includes a multi-aperture G1 grid for receiving the electron b... | 12/17/1996 |
| 5475281 | Cathode A low-power cathode can be obtained by arranging it on a substrate (1), preferably of silicon, which is entirely or partly removed at the location of the emissive structure (11) by means of, for example, anisotropic etching. Because of its low power, the ... | 12/12/1995 |
| 4994709 | Method for making a cathader with integral shadow grid A very fine-mesh, non-emissive shadow grid is formed on the smooth emissive surface 16 of a thermionic cathode 12 by deposition from a vapor a continuous layer 22 of non-emissive conductive material. Between the elements 24 of the grid the non-emissive ma... | 02/19/1991 |
| 4950946 | Display device comprising a flat display window and low-microphonics linear thermionic wire cathodes A display device having in an evacuated envelope a mechanically tensed thermionic linear wire cathode 4 and a bent first electrode 5 having a slit 6. The wire cathode 4 is rendered insensitive to microphonics by means of positioning means 22 which are urg... | 08/21/1990 |
| 4873468 | Multiple sheet beam gridded electron gun A gun for generating a multiple sheet beams 50 of electrons has a flat surfaced cathode 10 with parallel protruding ridges 12 of non-emitting material forming parallel focus electrodes for the sheet beamlets. A control grid of parallel bars 14 is aligned ... | 10/10/1989 |
| 4871949 | Cathode ray tube A cathode ray tube is disclosed which has a modulating grid for varying the charged particle flux density along a cross-section of a flat thin of charged particles or for varying the charged particle flux density in each of a plurality of charged particle... | 10/03/1989 |
| 4760309 | Modulator electrode structure for flat panel display devices A modulator structure includes modulation electrodes electrically coupled into pairs. Isolation electrodes are arranged adjacent to and in the plane of the modulation electrodes. The modulation electrodes are substantially U-shaped, and the isolation elec... | 07/26/1988 |
| 4748372 | Color display tube Coma correction means is provided in a color display tube including an evacuated envelope (1) containing an electron gun system (5) of the "in-line" type to generate three electron beams (6, 7, 8) situated with their axes in one plane. The electron beams ... | 05/31/1988 |
| 4634923 | Color picture tube having improved electron gun An improved 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 the tube. The three beams pass through a deflection zone ada... | 01/06/1987 |
| 4595858 | Reinforcing means for a cup-shaped electron gun electrode An electron gun assembly includes a plurality of cathode assemblies and a plurality of spaced successive electrodes mounted on at least two electrically-insulative support rods. At least one of the electrodes comprises a deep-drawn substantially rectangul... | 06/17/1986 |
| 4551648 | Line cathode heater and support structure for a flat panel display device A heater and support structure for a line cathode includes heater electrodes and an S-shaped cathode support member arranged between the heater electrodes. The heater electrodes and the S-shaped support member have a higher resistance than the cathode and... | 11/05/1985 |
| 4429251 | Line cathode support structure for a flat panel display device A support for supporting the line cathode of a flat panel display device is electrically insulative and has low thermal conductivity. The support is U-shaped and has a notch in the closed end for supporting the cathode a precise distance from the entrance... | 01/31/1984 |
| 4409514 | Electron gun with improved beam forming region An electron gun for use in a cathode ray tube includes beam forming electrodes and beam focusing electrodes. A gun improvement comprises the beam forming electrodes including a cathode, a control grid adjacent to the cathode and two screen grids. A first ... | 10/11/1983 |
| 4371808 | One-gun two-beam cathode ray tube The electron beam emanated by a single electron gun falls, after traversing two successive quadrupolar electron lenses, on a beam separator electrode having a pair of vertically spaced apertures formed therethrough for permitting the passage of fractions ... | 02/01/1983 |
| 4338541 | Multiple beam cathode ray tube having reduced off-axis aberrations A multiple beam cathode ray tube having diminished off-axis aberrations and a reduced length. A tube having a flat or planar electron beam emitter means, focussing means and deflection means is provided. A novel accelerating means is provided for accelera... | 07/06/1982 |
| 4333035 | Areal array of tubular electron sources An areal array of tubular electron sources is disclosed for producing multiple directed electron beams. Sources (10) are located in a parallel array between a conductive back plate (12) at a closed end of the tubes and a conductive face plate (14) having ... | 06/01/1982 |
| 4303930 | Semiconductor device for generating an electron beam and method of manufacturing same The invention relates to a semiconductor, cathode and a camera tube and a display tube, respectively, having such a cathode, based on avalanche breakdown in a p-n junction extending parallel to the surface of the semiconductor body. The released electrons... | 12/01/1981 |
| 4301389 | Multiple beam cathode ray tube with apertured cathode and control grid A multiple beam cathode ray tube having an improved cathode-grid structure which facilitates grid lead connections and mounting. The cathode means has a plurality of openings which are arranged in an array pattern which is identical to the desired electro... | 11/17/1981 |
| 4259678 | Semiconductor device and method of manufacturing same, as well as a pick-up device and a display device having such a semiconductor device The invention relates to a semiconductor cathode based on avalanche breakdown in the p-n junction. The released electrons obtain extra accelerating energy by means of an electrode provided on the device. The achieved efficiency increase makes the manufact... | 03/31/1981 |
| 4217519 | Isolation busbar for a flat panel display device In a display device having an evacuated envelope, an electron beam guide and an electron generating means for generating beams of electrons, a modulator structure on which is disposed a plurality of control electrodes may be formed by interconnecting sele... | 08/12/1980 |
| 4119882 | Cathode for flat panel display An evacuated envelope includes front and back walls and a plurality of spaced, parallel support walls between and perpendicular thereto. The support walls form therebetween a plurality of channels. In each of the channels is at least one beam guide which ... | 10/10/1978 |
| 4100450 | Method of and apparatus for generating longitudinal strips of energetic electron beams This disclosure deals with novel techniques for generating longitudinal strips of energetic electron beams through concentric slotted constructions, being quite adaptable for the generation of multiple beams in different directions that are of very narrow... | 07/11/1978 |
| 4009410 | Cathode-ray tubes electron-guns An electron-gun for cathode-ray tubes comprising, by comparison with prior art guns, at least one supplementary electrode (6) of the diaphragm type, arranged between the accelerator grid (3) and the anode (4) of such gun, and placed at a positive potentia... | 02/22/1977 |
| 4001620 | Modulation mask for an image display device A metal sheet is provided with a plurality of slots which are disposed in parallel rows and columns. Charge sensing pads are disposed on an insulating layer on one surface of the metal sheet with a separate pair of the charge sensing pads being in abuttin... | 01/04/1977 |
| 4001619 | Modulation mask for an image display device A metal sheet is provided with a plurality of slots which are disposed in parallel rows and columns. Charge sensing pads are disposed on an insulating layer on one surface of the metal sheet with a separate pair of the charge sensing pads being in abuttin... | 01/04/1977 |
