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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7432521 | Logical operation element field emission emitter and logical operation circuit A logical operation element and logical operation circuit are provided that are capable of high speed and a high degree of integration. A logical operation circuit has a construction wherein, in a logical operation element, the anodes of first and second fiel... | 10/07/2008 |
| 7417366 | Display device The present invention provides an image display device in which it is possible to obtain an image display of high brightness and high contrast by preventing the halation which may be generated in a peripheral portion of a display image. By providing a carbon film wh... | 08/26/2008 |
| 6991849 | Near infrared ray shielding film A near infrared screening film which consists of a biaxially oriented film made from a polyester containing a near infrared light absorber having a weight reduction start temperature of at least 280° C. and which has a haze value of 5% or less and a total transmitt... | 01/31/2006 |
| 6179976 | Surface treatment and method for applying surface treatment to suppress secondary electron emission A surface treatment and method for applying the surface treatment to electrical components are provided that include a coating of yttrium-iron-garnet (YIG), which is applied to the inner surface of the component by sputtering.... | 01/30/2001 |
| 5981935 | Radiological image intensifier tube having an aluminum layer The disclosure relates to radiological image intensifier tubes comprising a vacuum electron tube and a luminescent observation screen comprising means to improve the contrast of the image. These means consist of a layer of aluminium with a thickness of at... | 11/09/1999 |
| 5639330 | Method of making an image display element An image display element comprising a vacuum exterior container including a face plate and a back housing. A cathode is located within the vacuum exterior container. A control electrode controls electron beams projected from the cathode and a fluorescent ... | 06/17/1997 |
| 5394060 | Inclined getter structure for a magnetron This invention relates to a magnetron for generating a microwave, in which an upper end shield and a lower end shield for supporting respectively top end and bottom end of a filament, which is a cathode portion, are included, the upper end shield being ma... | 02/28/1995 |
| 5384597 | Image pickup tube utilizing third electrode and its operating method An image pickup tube is provided with the third electrode to control the potential of the region which is not scanned by an electron beam in the image pickup tube target section including a target electrode and a photo-conductive film. A method for operat... | 01/24/1995 |
| 5155411 | Color CRT assembly having an improved envelope A color CRT assembly comprises a tube having an external magnetic deflection yoke thereon. The tube includes an evacuated envelope with a substantially rectangular faceplate panel and a tubular neck connected by a funnel having a rectangular open end seal... | 10/13/1992 |
| 5021705 | Method of fabricating an image pick-up tube and target section used therewith An image pick-up tube and a method of fabricating an image pick-up tube and a target section used therewith, in which the target includes at least a conductive film and a photoconductive film on a substrate for photo-electric conversion, and a signal from... | 06/04/1991 |
| 5012152 | Image intensifier tube comprising coated electrodes Metal parts of an image intensifier tube which are exposed to a high voltage are coated with a layer of aluminum phosphate glass in order to preclude local discharge phenomena; the aluminum phosphate glass can be deposited in a thin, uniform layer already... | 04/30/1991 |
| 4987336 | Reversible short-circuit and the use of said short-circuit in a photoelectric tube A reversible short circuit device in the form of a metal loop. The metal loop has a first base side which forms a first contact. Extending from the base side are second and third generally parallel sides. The second side includes a contact portion for eng... | 01/22/1991 |
| 4908545 | Cathode ray tube In order to reduce contrast degradation in an electrostatically scanned flat cathode ray tube having a channel plate electron multiplier due to back-scattered electrons entering channels remote from their origin, steps are taken to restrict the acceptance... | 03/13/1990 |
| 4900973 | Electron tube sealing structure In an electron tube sealing structure, a cylindrical insulator is metallized to produce metallized layers on both end surfaces, and sealing metal members are soldered to the metallized layers correspondingly, so that a vacuum chamber is provided in the in... | 02/13/1990 |
| 4748373 | Flat cathode ray display tube with beam generator subassembly A flat cathode ray display tube has an envelope divided into front and rear portions by a partition carrying frame deflection electrodes with an electron gun (30) and line scanning deflector positioned in the rear portion, the electron beam being directed... | 05/31/1988 |
| 4709129 | Microwave heating apparatus A microwave power source for a microwave oven in which a microwave magnetron is supplied simultaneously with filament heater power and with anode voltage through an inductive reactance power supply and has end shields with peripheral depressions to suppre... | 11/24/1987 |
| 4677341 | Synchronous scan streaking device A synchronous scan streaking device comprising a photoelectric layer, an electronic lens, an anode with an aperture, a pair of deflection electrodes, and a phosphor layer arranged in order within a vacuum envelope. A deflection voltage at the same frequen... | 06/30/1987 |
| 4639638 | Photomultiplier dynode coating materials and process The photosensitivity of a photomultiplier dynode to white light or infrared radiation is greatly reduced by coating the dynode with a layer of an alkali halide material having good secondary electron emission characteristics. A method of applying the coat... | 01/27/1987 |
| 4609846 | Image pick-up tube having collector and balance electrodes An image pick-up tube has a photoelectric conversion target including a transparent substrate, and a transparent electrode and a photoconductive layer formed on the transparent substrate. An electron beam is scanned on the photoelectric conversion target.... | 09/02/1986 |
| 4607193 | Textured carbon surfaces on copper by sputtering A very thin layer of highly textured carbon is applied to a copper surface by a triode sputtering process. A carbon target 10 and a copper substrate 12 are simultaneously exposed to an argon plasma 14 in a vacuum chamber. The resulting carbon surface is charac... | 08/19/1986 |
| 4550297 | RF Component having self-biasing to eliminate multipacting In an RF/microwave component such as a resonator, multipacting is eliminated in accordance with the present invention by rectifying a portion of the RF signal present within the component to derive a dc potential. This dc potential is used to bias the com... | 10/29/1985 |
| 4511822 | Image display tube having a channel plate electron multiplier The image contrast in an image display tube having a channel plate electron multiplier (2) is improved by preventing secondary electrons emitted from the face of an input dynode (26) from straying to channels located at a relatively large distance from th... | 04/16/1985 |
| 4417175 | Ion sputter textured graphite electrode plates A specially textured surface of pyrolytic graphite exhibits extremely low yields of secondary electrons and reduced numbers of reflected primary electrons after impingement of high energy primary electrons. Electrode plates of this material are used in mu... | 11/22/1983 |
| 4349424 | Ion sputter textured graphite A specially textured surface of pyrolytic graphite exhibits extremely low yields of secondary electrons and reduced numbers of reflected primary electrons after impingement of high energy primary electrons. An ion flux having an energy between 500 eV and 1000 ... | 09/14/1982 |
| 4347458 | Photomultiplier tube having a gain modifying Nichrome dynode An electron discharge device includes an evacuated envelope having therein a photocathode, an anode and an electron multiplier. The electron multiplier comprises a plurality of dynodes having a nickel substrate, an exposed surface of which has a base laye... | 08/31/1982 |
| 4309637 | Rotating anode X-ray tube In rotating anode X-ray tubes it has not been the practice to provide anode cooling because of problems in arranging coolant flow. A further problem which has arisen, particularly in tubes for computerized tomography which should have precisely defined fo... | 01/05/1982 |
| 4233539 | Electron tube with reduced secondary emission Secondary electrons emitted from an electron-collecting electrode of a vacuum tube degrade the performance. Emission of high-speed secondaries is reduced by coating the electron-collecting surface with a material of low atomic number. Emission of low-spee... | 11/11/1980 |
| 4079286 | Grid having reduced secondary emission characteristics and electron discharge device including same A nickel oxide surface layer of a nickel mesh supporting structure is coated with a layer of chromium. The nickel oxide layer has a thickness of between about 500 to 750A. The layer chromium is at least about 100A thick. The chromium coated nickel oxide-n... | 03/14/1978 |
| 3988636 | Magnetron with cathode end shields coated with secondary electron emission inhibiting material In a magnetron comprising a cathode electrode, an anode electrode surrounding the cathode electrode and end shields mounted on the opposite ends of the cathode electrode, the inner surfaces of one or both end shields are provided with thin layers of a pow... | 10/26/1976 |
| 3973157 | Charged-particle trapping electrode A charged particle collecting body forming part of an electrode comprises a three dimensional network defining a multiplicity of interconnecting free cells. The dimensions of the cells are selected to permit a major portion of charged particles incident t... | 08/03/1976 |
