Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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| Number | Title | Issue Date |
| 7414356 | Cathode structure including barrier for preventing metal bridging from heater to emitter A cathode structure comprises a heater including a columnar ceramic body and a heating wire that is partially buried in the ceramic body, and a cathode unit disposed at a first end surface of the ceramic body. The heating wire leads out from a second end surface of ... | 08/19/2008 |
| 7348718 | Discharge electrode implemented by a wide bandgap semiconductor and a discharge lamp using the same A discharge electrode emitting electrons into a discharge gas, encompasses an emitter and current supply terminals configured to supply electric current to the emitter. The emitter embraces a wide bandgap semiconductor having at 300 K a bandgap of 2.2 eV or wider. A... | 03/25/2008 |
| 7215070 | System, method and apparatus for multi-beam lithography including a dispenser cathode for homogeneous electron emission A dispenser cathode which comprises an emission surface, a reservoir for material releasing, when heated, work-function-lowering particles, and at least one passage for allowing diffusion of work-function-lowering particles from said reservoir to said emission surfa... | 05/08/2007 |
| 7193367 | Indirectly heated electrode for gas discharge tube, gas discharge tube with this, and its operating device An indirectly heated cathode C1 comprises a heater 1, a double coil 2, a mesh member 3, and a metal oxide 10. An electrical insulating layer 4 is formed on the surface of heater 1. Heater 1 is inserted into and... | 03/20/2007 |
| 7180231 | Electron beam emitter A filament for generating electrons for an electron beam emitter where the filament has a cross section and a length. The cross section of the filament is varied along the length for producing a desired electron generation profile. ... | 02/20/2007 |
| 7176641 | Cathode ray tube A heat generating portion of a heater which is incorporated in an indirectly heated cathode structure of an electron gun for a cathode ray tube is formed by joining a first winding portion and a second winding portion which differ in the number of coil winding layer... | 02/13/2007 |
| 7138754 | Cathode for electron tube and method for manufacturing the same An oxide cathode for an electron tube and a method for manufacturing the oxide cathode are provided. In the oxide cathode including a sleeve for a heater, a metal substrate formed on the top of the sleeve, and an electron emission material layer coated on the metal ... | 11/21/2006 |
| 7071605 | Cathode structure for color cathode ray tube The present invention relates to a cathode ray structure for a cathode ray tube, and more particularly, to a cathode structure for a cathode ray tube capable of maximizing thermal efficiency and minimizing power consumption. ... | 07/04/2006 |
| 7026749 | Cathode for electron tube and method of preparing the same A cathode for an electron tube and a method of preparing the same are provided. The cathode includes a base metal and an electron emissive material layer attached to the base metal. A surface roughness, which is measured from the distance between a highest point and... | 04/11/2006 |
| 7019450 | Cathode ray tube with a particle-particle cathode coating The invention relates to a cathode ray tube equipped with at least one oxide cathode comprising a cathode carrier having a cathode base of a first cathode metal and having a covering layer of ultrafine metal particles that contain nickel. The oxide cathode also comp... | 03/28/2006 |
| 7005783 | Solid state vacuum devices and method for making the same A solid state vacuum device (SSVD) and method for making the same. In one embodiment, the SSVD forms a triode device comprising a substrate having a cavity formed therein. The SSVD further comprises an anode positioned in the cavity of the substrate, a cathode suspe... | 02/28/2006 |
| 6992427 | High-yield cathode body, cathode sleeve structure, and cathode-ray tube, cathode sleeve substrate, and cathode body production method A cathode sleeve structure for housing a heater. The cathode sleeve structure includes: a case member that is cylindrical and an end thereof is open; a plurality of supporting members that extend radially from vicinities of the end of the case member; and a linkage ... | 01/31/2006 |
| 6979942 | Cathode emissive body for an impregnated cathode of an electron tube Body (1) formed from a porous matrix impregnated with an electron-emitting material, defined by external faces (11, 12, 13) that all have a roughness of less than 0.2 μm. Because of this surface finish, the operation and the lifetime of the cat... | 12/27/2005 |
| 6972522 | Magnetron A magnetron capable of being efficiently assembled is provided. The magnetron includes a filament, a pair of shields, a pair of leads, a pair of connection plates, and a pair of terminal rods. The filament is coil-shaped. The shields are attached to both ends of the... | 12/06/2005 |
| 6946781 | Cathode with optimized thermal efficiency A cathode structure for an electron gun of a cathode-ray tube having a reduced size and providing a fast cathode start-up time and excellent thermal efficiency. The cathode comprises a closed chamber consisting of a cap supporting an emitting part of the cathode and... | 09/20/2005 |
| 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 |
| 6903499 | Electron gun and a method for using the same An electron gun includes an electron emission cathode, a control electrode, and an extractor and the electron emission cathode is made of rare earth hexaboride. A tip of the electron emission cathode is located between the control electrode and the extractor, and th... | 06/07/2005 |
| 6828996 | Electron beam patterning with a heated electron source An electron source has an anode and a cathode that is capable of being negatively biased relative to the anode, the cathode having an electron emitting portion and a cathode axis. An electromagnetic radiation source is adapted to generate an electromagnetic radiatio... | 12/07/2004 |
| 6815876 | Cathode with improved work function and method for making the same A cathode with an improved work function, for use in a lithographic system, such as the SCALPEL™ system, which includes a buffer between a substrate and an emissive layer, where the buffer alters, randomizes, miniaturizes, and/or isolates the grain structure at a ... | 11/09/2004 |
| 6798128 | Cathode-ray tube cathode and alloy therefor A nickel alloy for the manufacture of cathodes for cathode-ray tubes, comprises magnesium and aluminium in proportions chosen so as to allow good adhesion of an emissive oxide layer to the basis metal cap consisting of the alloy. ... | 09/28/2004 |
| 6791251 | Metal cathode and indirectly heated cathode assembly having the same A metal cathode for an electron-emission device, and an indirectly heated cathode assembly employing the metal cathode where the metal cathode is formed of a quaternary alloy including 0.1-20% by weight barium (Ba), 0.1-20% by weight a metallic mobilizer facilitatin... | 09/14/2004 |
| 6762544 | Metal cathode for electron tube An indirectly heated metal cathode for an electron tube includes a metal sleeve of an Mo material, a metal emitter disposed on the metal sleeve and including Pt or Pd as a main component; and a buffer layer between the metal sleeve and the metal emitter. The buffer ... | 07/13/2004 |
| 6759799 | Oxide-coated cathode and method for making same The oxide cathode comprises a support and an oxide layer on the latter. It furthermore includes particles of a conducting material having a first end incorporated in the support and a second end lodged in the oxide layer, so as to constitute conducting bridges passi... | 07/06/2004 |
| 6686682 | Cathode in cathode ray tube Disclosed is a cathode in a cathode ray tube including a cathode sleeve having a heater inside, a base metal supported by the cathode sleeve so as to be formed at an upper end of the cathode sleeve, and an emission layer formed on the base metal, wherein ... | 02/03/2004 |
| 6600257 | Cathode ray tube comprising a doped oxide cathode A cathode ray tube is provided with at least one oxide cathode including a cathode carrier with a cathode base of a cathode metal and a cathode coating of an electron-emitting material with oxide particles. The oxide particles contain an alkaline earth ox... | 07/29/2003 |
| 6552479 | Cathode ray tube having an improved heater A cathode ray tube has an electron gun including an indirectly heated cathode structure having a heater therein. The heater has a major heating portion formed of a spirally wound heating wire and two leg portions connected to opposite ends of the major he... | 04/22/2003 |
| 6495949 | Electron tube cathode An electron tube cathode is disclosed, comprising a base, electron emissive material layers formed on the base and containing alkaline earth metal oxides including barium, and reducing metal layers interposed between the emissive material layers. The meta... | 12/17/2002 |
| 6492765 | Cathode structure for cathode ray tube In a cathode with an electron-emissive material layer formed on a base containing a reducing element, a relationship of 0.24ࣘB/Aࣘ0.93 is satisfied, where A denotes a surface for layer formation of the base and B represents an area where the base and ... | 12/10/2002 |
| 6492768 | Cathode ray tube having an improved indirectly heated cathode A cathode ray tube includes a phosphor screen and an electron gun. The electron gun includes an indirectly heated cathode structure and plural grid electrodes in axially spaced relationship. The cathode structure includes a base metal having an electron e... | 12/10/2002 |
| 6417607 | Cold electrode for gas discharges Cold electrodes for gas discharges have an electrically conductive carrier material on which an emission coating is disposed. The photoelectric output work of the material of the emission coating is less than that of the carrier material or less than 5.6*... | 07/09/2002 |
| 6376975 | Impregnated cathode and method for manufacturing the same An impregnated cathode whose initial electron emitting performance, lifetime property, and insulating property for an electron gun are excellent and that is suitable for mass production, and a method for manufacturing the same. In the impregnated cathode,... | 04/23/2002 |
| 6362563 | Two-layer cathode for electron gun A cathode for use in an electron gun includes a base metal comprising Ni as a principal component and a two-layer electron emissive material disposed on the base metal. The inner layer is comprised of an alkaline earth metal oxide and 1-30 wt. % W and may... | 03/26/2002 |
| 6351061 | Cathode, method for manufacturing the cathode, and picture tube A cathode structure comprises a cylindrical metal sleeve having aperture portions at both ends, a base metal having an aperture portion on one end, which is fitted onto one of the aperture portions of the metal sleeve, and an electron-emitting layer, whic... | 02/26/2002 |
| 6348756 | Electric discharge tube or discharge lamp and scandate dispenser cathode An electric discharge tube or discharge lamp comprising a scandate dispenser cathode which is composed of a cathode body and a coating having an emissive surface, said cathode body including a matrix of at least one refractory metal and/or a refractory al... | 02/19/2002 |
| 6335590 | Cathode ray tube having an indirectly heated cathode provided with a heater having a structure which substantially prevents cracks in an insulating coating thereof A cathode ray tube include phosphor screen and an electron gun. The electron gun includes an indirectly heated cathode structure and plural grid electrodes arranged in axially spaced relationship. The cathode structure includes a base metal having an elec... | 01/01/2002 |
| 6300711 | Indirectly heated cathode with a thermal absorption layer on the sleeve and cathode ray tube An indirectly heated cathode that can enhance the withstand voltage and the efficiency of radiating heat from a heater to a tubular sleeve, and a cathode ray tube using such a cathode. The indirectly heated cathode comprises a hot cathode emitting electro... | 10/09/2001 |
| 6252341 | Impregnated cathode having varying surface porosity An impregnated cathode and a method of manufacturing the same are provided for suppressing emission of unwanted electrons and particles generated from an excess electron emitting substance so as to achieve a steady electron emission characteristic. The im... | 06/26/2001 |
| 6242852 | Electron gun A heater is built in an inner sleeve of an electron gun, and an impregnated type cathode is fixed at an end portion, on the grid electrodes side, of the inner sleeve. The inner sleeve, having an outside diameter ranging from about 1.0 mm to 1.4 mm and a l... | 06/05/2001 |
| 6232708 | Cathode with an electron emitting layer for a cathode ray tube A cathode for a cathode ray tube includes a base having a closed top portion and containing nickel as its main component, an electron-emitting material layer coated on the top portion of the base and containing alkali-earth metal oxides as its main compon... | 05/15/2001 |
| 6130502 | Cathode assembly, electron gun assembly, electron tube, heater, and method of manufacturing cathode assembly and electron gun assembly A cathode assembly (27) includes a thermally conductive insulating substrate (21) having a pair of opposing surfaces. A cathode base member (24) is formed on one surface of the insulating substrate, and a heating member (25) for heating the cathode base m... | 10/10/2000 |
