Matches 251 - 300 out of 396 < 1 2 3 4 5 6 7 8 >
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5256095 Method of fabricating an electrode for a discharge lamp and the electrode formed thereby  
An electrode of a discharge lamp which has an improved adhesion between an emitter material and a filament is formed in accordance with the following method. That is, a Fe-Cr-Al alloy is used as...
5249340 Field emission device employing a selective electrode deposition method  
A method of forming a field emission device including the steps of selective deposition of a column/ridge within the confines of a conformally deposited insulator layer and subsequent directional...
5219310 Method for producing planar electron radiating device  
A method for producing a planar type electron radiating device including a plurality of cathodes having pointed ends on a major surface of a substrate, and a gate electrode having holes in the...
5211707 Semiconductor metal composite field emission cathodes  
A field emission cathode having a parallel array of individual electrically conductive rods of metal silicide or germanide in a silicon-based or germanium-based single crystal matrix. Each rod has...
5173634 Current regulated field-emission device  
A field emission device is set forth for providing a current-regulating and potential equilibrium function.
5171180 Method for manufacturing impregnated cathodes  
A method for manufacturing an impregnated cathode wherein an impregnated pallet is fixedly fitted in a cathode cup. The method comprises the step of disposing electron emitting materials together...
5122707 Cathode in a cathode ray tube  
A cathode for use in electron tubes which comprises a base metal made of nickel as a principal component and having a surface on which a porous electron emissive layer is formed. The porous...
5121027 Oxide-coated cathode for CRT and manufacturing method thereof  
This invention relates to an oxide-coated cathode for CRT and a manufacturing method thereof, where Scandium (Sc) or Scandium Oxide (Sc 2 O 3 ) is vaporized and ionized into a gas state under the...
5118317 Impregnated cathodes with a controlled porosity  
A storage cathode comprising a porous, sintered body of a refractory metal is produced by compacting and sintering powder particles of a refractory metal, at least a portion of which are coated,...
5114742 Preparing a scandate cathode by impregnating a porous tungsten billet with Ba.sub.3 Al.sub.2 O.sub.6, coating the top surface with a mixture of Sc.sub.6 WO.sub.12, Sc.sub.2 (WO.sub.4).sub.3, and W in a 1:3:2 mole ratio, and heating in a vacuum  
An improved scandate cathode having an increased emission density is prepared from a porous tungsten billet that has been impregnated with Ba 3 Al 2 O 6 by coating the top surface of the...
5096450 Method for fabricating an impregnated type cathode  
A method for fabricating an impregnated type cathode comprises the steps of mixing metal powder having a high melting point and a heat proof property, and electron emission substance powder in a...
5089742 Electron beam source formed with biologically derived tubule materials  
A field emitter array comprises an array of aligned metallic, conductive rotubules extending from a conductive base. The array is typically made by cutting a matrix comprising the aligned...
5074456 Composite electrode for plasma processes  
An electrode assembly for a plasma reactor, such as a plasma etch or plasma-enhanced chemical vapor deposition reactor, comprises an electrode plate having a support frame attached to one surface...
5074818 Method of making and improved scandate cathode  
An improved scandate cathode is made from a hollow cylinder of a metal that ill not react with Sc 2 (WO 4 ) 3 . The first step in making such a cathode is to insert a metal plug at the bottom of...
5055078 Manufacturing method of oxide cathode  
A manufacturing method of oxide cathode for electron tube in which adding method of scandium Sc and yttrium Y for extending duration of ternary carbonate solid solution is improved and excellent...
5015908 Fast warm-up cathode for high power vacuum tubes  
In order to bring a high power vacuum tube to full power in a few seconds, it is necessary to heat the cathode quickly to 1100° C. In large tubes, prior art structures cannot be simply enlarged. A...
5006753 Scandate cathode exhibiting scandium segregation  
By providing at least the top layer of the matrix of a scandate cathode with an alloy or compound which exhibits scandium segregation, a satisfactory recovery for cathodes with a high emission can...
5001397 High-pressure gas discharge lamp having electrodes with coil layers having interlocking turns  
The high-pressure gas discharge lamp according to the invention has electrodes which comprise an electrode rod 24 and a helical winding 26 near its tip 25 projecting into the lamp vessel, both of...
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...
4990823 Electron gun and method of manufacturing an electron gun, and display tube comprising such an electron gun  
The invention relates to an electron gun comprising a cathode-unit composed of a cathode shaft (53) which is surrounded by a heat reflection screen (56). A connection piece (55) is secured to the...
4978885 Electron multipliers with reduced ion feedback  
Reduced ion feedback in an electron multiplier (EM) is achieved by applying a higher than normal bias voltage to the EM and degassing the EM with a relatively high concentration of self-generated...
4976644 Manufacturing method for dispenser cathode for an electron gun  
A manufacturing method for a dispenser cathode for the electron gun, said cathode comprising a container, an electron emissive material in the container, a porous metal body covering the emissive...
4975656 Enhanced secondary electron emitter  
The present invention discloses an enhanced secondary electron emitter cathode suitable for use in a typical crossed-field amplifiers. The emitter surfaces of the cathode are formed into...
4969850 Method of manufacturing a cold cathode, field emission device and a field emission device manufactured by the method  
A method is provided for manufacturing a cold cathode field emission device. The method comprises the steps of: providing a layer of anodised alumina having a plurality of elongate pores which are...
H000849 Method of making a cathode from tungsten and iridium powders using a strontium peroxide containing material as the impregnant  
A cathode is made from a mixture of tungsten and iridium powders using a ontium peroxide containing material as the impregnant.
4956574 Switched anode field emission device  
A field emission device wherein two collecting electrodes are provided to selectively collect electrons that are emitted from an emitting electrode as induced by a gate electrode.
4952841 High-pressure discharge lamp with improved electrodes  
The high-pressure discharge lamp has electrodes which comprise a tungsten rod (24) which projects inside the lamp vessel and around whose end (25) projecting inside the lamp vessel a tungsten wire...
4912362 Sturdy oxide cathode for cathode ray tube  
In thermoemissive cathodes for cathode ray tubes, in particular filament heated barium-calcium-strontium oxide cathodes, to give sturdiness to the filament and its alumina sheath in the presence of...
4910079 Method for the fabrication of an impregnated cathode and cathode obtained thereby  
Disclosed are a method for the fabrication of an impregnated cathode and a cathode obtained thereby. The impregnation is obtained by applying a sol-gel method. The emissive material which...
4894257 Method of overcoating a high current density cathode with rhodium  
A tungsten-iridium billet is impregnated with a chemical mixture of barium xide, strontium oxide, and aluminum oxide, the impregnated billet heated, and the surface of the impregnated billet...
4873052 Method of manufacturing a scandate dispenser cathode and scandate dispenser cathode manufactured according to the method  
A method of manufacturing a scandate dispenser cathode having a matrix (1) at least the top layer of which consists substantially of a mixture of tungsten with scandium oxide or with a mixed oxide...
4847534 High-pressure discharge lamp with torsionally wound electrode structure  
The high-pressure gas discharge lamp according to the invention has electrodes comprising a rod of mainly tungsten and a helical winding of mainly tungsten near the tip of the rod. The winding has...
4843277 Single crystal emitter with heater wire embedded therein  
Improved anchoring of heating elements of a resistance heater to thermally stressed single crystals is achieved by embedding the individual heating element in a recess in the single crystal and...
4836816 Method of treating tungsten cathodes  
A method of treating a tungsten cathode that is comprised of coating the surface of the tungsten cathode with a triple carbonate suspension. The coated tungsten cathode is placed in a heated...
4760306 Electron emitting filaments for electron discharge devices  
Electrons are copiously emitted by a device comprising a loop-shaped filament made of lanthanum hexaboride. The filament is directly heated by an electrical current produced along the filament by a...
4745326 Method of manufacturing integral shadow gridded controlled porosity, dispenser cathodes  
A controlled porosity dispenser cathode and method of manufacture therefo using chemical vapor deposition and laser drilling, ion milling, or electron discharge machining for consistent and...
4708681 Method of making a long lived high current density cathode from tungsten and iridium powders  
A long lived high current density cathode is made from a mixture of tungs and iridium powders by processing the mixture of powders with an activator into a porous billet, and then impregnating the...
4708677 Method of measuring the temperature of a photocathode  
A method of determing the actual temperature of a layer of an infrared material, especially during heat cleaning, which includes measuring the thickness of the layer and the amount of radiation...
4684353 Flexible electroluminescent film laminate  
Electroluminescent elements of high light intensity and long useful life, operating at comparatively low energy input, are obtained by directly bonding to a supported web of thin plastic film...
4675570 Tungsten-iridium impregnated cathode  
Porous agglomerates are made from pure tungsten by sintering fine particles together and mechanically breaking down the mass to form some agglomerates considerably larger than the particles. These...
4671777 Method of manufacturing a dispenser cathode and the use of the method  
The invention relates to a method of manufacturing a dispenser cathode having a porous tungsten body, in which a metal oxide is provided in the body and the body is impregnated with barium. Good...
4671776 Manufacturing method of color picture tube  
A manufacturing method of a color picture tube includes the steps of forming a shadow mask having a main surface portion in which a plurality of apertures are formed, coating at least one surface...
4599076 Method of producing discharge display device  
The present invention discloses a method of producing a discharge display device which enables a LaB 6 cathode to be formed by a thick-film printing method. The method of the present invention...
4595375 Imaging and streaking tubes, and methods for fabricating the imaging and streaking tubes  
An imaging tube for amplifying and observing a diminished light image and a streaking tube for analyzing the light intensity distributions of light sources with elapsing of time. In order to avoid...
4587455 Controlled porosity dispenser cathode  
An emitter-dispenser housing for a controlled porosity dispenser cathode manufactured of a single material as a unitary piece by a chemical vapor deposition process in which a configured mandrel is...
4533852 Method of manufacturing a thermionic cathode and thermionic cathode manufactured by means of said method  
The cathode (4) the material of which is substantially high-melting metal such as W, Mo, Ta, Nb, Re and/or C, consists of a very fine-grained mechanically stable support layer (5), a series of...
4530669 Method of making a borided dispenser cathode  
A borided dispenser cathode of the type including a metallic base material is made by cleaning the cathode by annealing it in a hydrogen-containing atmosphere, depositing boron on the cathode by...
4528474 Method and apparatus for producing an electron beam from a thermionic cathode  
Disclosed is a method and apparatus for producing a high electron beam current having a low energy spread at a high brightness of the beam and a uniform intensity distribution. The electron beam is...
4524297 Thermionic cathode and method of manufacturing same  
A cathode having a layer structure in which alternate layers consisting essentially of emitter material (2) and base material (1) are provided at an oblique angle to the cathodes's macroscopic...
4498952 Batch fabrication procedure for manufacture of arrays of field emitted electron beams with integral self-aligned optical lense in microguns  
A semiconductor type batch fabrication procedure is disclosed in the preferred and illustrated embodiment. The process forms individual field emission devices and the necessary electron optics for...
Matches 251 - 300 out of 396 < 1 2 3 4 5 6 7 8 >