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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...
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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...
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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...
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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...
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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...
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4506187 |
Lamp filament structure, and method of its manufacture
The amount of emitter paste which can be applied to the filament used in orescent tubes can be increased by winding the filament, as previously proposed, about an iron or molybdenum mandrel which...
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4468586 |
Shaped electron emission from single crystal lanthanum hexaboride with intensity distribution
The shape of an electron beam emitted from an LaB 6 single crystal cathode can be controlled directly by shaping the cathode tip itself. The LaB 6 cathode is provided with a flat top surface...
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4459322 |
Method for producing cathode structure for cathode ray tubes utilizing urea-containing slurry
Cathode structures for cathode ray tubes are produced by dispensing slurry drops of cathode material onto metallic supporting substrates, and drying the drops to form cathode layers. The slurry...
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4444718 |
Method of making a high current density cathode
A high current density cathode is made by first forming an active porous h purity tungsten pellet by the steps of: (A) mixing tungsten powder with about 1 to 5 percent by weight of the mixture...
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4424044 |
Method of fabricating cathode electrodes
A method is disclosed to fabricate a cathode electrode for a continuous wave magnetron so that the resulting product is relatively free from random frequency modulation and frequency "pushing". The...
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4379979 |
Controlled porosity sheet for thermionic dispenser cathode and method of manufacture
A controlled porosity sheet defining a surface for a thermionic dispenser thode and a method of manufacture. Starting with a generally flat silicon template substrate structure having an array of...
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4359666 |
Cylindrical cathode with segmented electron emissive surface and method of manufacture
A new method of fabricating a cylindrical segmented cathode by bending a photoetched bar-band to form a cylindrically-shaped cage and slipping it over a cylindrical electron emissive surface which...
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4325000 |
Low work function cathode
Disclosed is an electron-beam cathode which emits electrons with a low work function over a relatively wide range of temperature and pressure. The cathode is comprised of single crystal tungsten...
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4324999 |
Electron-beam cathode having a uniform emission pattern
Disclosed is an electron-beam cathode which emits electrons in a cone-shaped pattern whose electron density is substantially uniform throughout the cone. The cathode is comprised of a needle-shaped...
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4307507 |
Method of manufacturing a field-emission cathode structure
A method of manufacturing a field-emitter array cathode structure in which substrate of single crystal material is selectively masked such that the unmasked areas define islands on the underlying...
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4302702 |
Thermionic cathode having an embedded grid, process for its fabrication, and high frequency electron tubes using such a cathode
The invention relates to metal oxide activated porous tungsten cathodes and methods of their manufacture. A cathode 1 of porous tungsten activated by metal oxides is mounted on a housing 2 which...
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4253221 |
Method of producing low voltage field emission cathode structure
A method of making a low voltage field device utilizing a preferentially etched unidirectionally solidified composite as the substrate. In the process, the composite is etched so that the...
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4168213 |
Field emission device and method of forming same
A field emission device and method of forming same, comprising a substrate on which at least one conical electrode is provided, which substrate, with the exception of the proximity of the tip of...
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4143292 |
Field emission cathode of glassy carbon and method of preparation
A field emission cathode comprising a cathode base composed of carbon or a high-melting-point metal and a needle-shaped cathode composed of glassy carbon, which can provide a high field emission...
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4117367 |
High-pressure discharge lamp
A high-pressure discharge lamp having at least one electrode fabricated by an isostatic compression process.
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4114243 |
Process for producing cathode for cathode ray tube of directly heating type
In a process for producing a cathode for a cathode ray tube of directly heating type, which comprises shaping a heat-resistant and electro-conductive, flat metal plate, into a cathode substrate...
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4084942 |
Ultrasharp diamond edges and points and method of making
Ultrasharp diamond edges and points which are usable as cutting instruments and as high intensity point sources for the emission of electrons, ions, x-rays, coherent and incoherent light and high...
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3970887 |
Micro-structure field emission electron source
A new and improved microminiature field emission electron source and method of manufacturing is described using a single crystal semiconductor substrate. The substrate is processed in accordance...
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3967150 |
Grid controlled electron source and method of making same
A grid-controlled electron source comprises an apertured grid spaced in front of a thermionic cathode. Areas of the cathode directly behind the grid conductors are made non-emissive by a bonded...
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3921022 |
Field emitting device and method of making same
A non-thermionic field emitting device includes at least one pyramidal shaped field emitting element on one surface of an electrically conductive substrate. At least one needle-like projection is...
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3812559 |
METHODS OF PRODUCING FIELD IONIZER AND FIELD EMISSION CATHODE STRUCTURES
Field-forming devices primarily useful as field ionizers and field emission cathodes and having as a basic element an array of closely spaced cones with sharp points supported on a substrate (in...
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3789471 |
FIELD EMISSION CATHODE STRUCTURES, DEVICES UTILIZING SUCH STRUCTURES, AND METHODS OF PRODUCING SUCH STRUCTURES
Vacuum devices incorporate electron or field forming sources formed by a cellular array of emission sites. The sources comprise a metal/insulator/metal film sandwich on a substrate with a cellular...
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3786542 |
METHOD OF FORMING CIRCUIT STRUCTURES BY PHOTO ETCHING-ELECTROFORMING PROCESS
A mandrel or mold shaped in a desired configuration is formed by photoprocessing a film of photopolymer applied to a substrate. A metallic structure is formed in the mold by electroforming. The...
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3763346 |
METHODS OF SHAPING RESHARPENING OR CLEANING TIPS
This invention relates to a method of shaping, resharpening, or cleaning tips, particularly the ends of filaments used as electrodes emitting electric particles by field effect. This process...
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3711908 |
METHOD FOR FORMING SMALL DIAMETER TIPS ON SINTERED MATERIAL CATHODES
There is disclosed a method for forming tips on normally sintered material electron-emitting cathodes. The method comprises melting the electron-emitting end of the cathode with an electron beam or...
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3662789 |
MANDREL FOR MANUFACTURING FILAMENT COILS AND METHOD FOR MANUFACTURING FILAMENT COILS
A mandrel and a method for manufacturing filament coils for electric lamps. The mandrel is coated with a material, such as copper, which does not alloy with the filament coil during annealing. The...
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3615901 |
METHOD OF MAKING A PLASTICALLY SHAPEABLE CATHODE MATERIAL
A plastically shapeable cathode material is prepared by depositing on a nickel substrate a layer of a mixture of nickel or nickel oxide powder and barium, strontium and calcium carbonates;...
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3594885 |
METHOD FOR FABRICATING A DIMPLED CONCAVE DISPENSER CATHODE INCORPORATING A GRID
Methods for fabricating concave dimpled dispenser cathodes are disclosed. A multicell groove pattern is formed in the concave face of the cathode blank. An array of concave dimples are formed in...
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3567989 |
ELECTRON TUBE WITH MESH-TYPE CATHODE HAVING EMISSIVE PORTIONS BETWEEN CROSS STRIPS
A cathode structure of substantially uniform thickness exhibiting reduced heating time in an electron tube having a mesh grid, the cathode comprising a mesh portion consisting of substantially flat...
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3538570 |
THERMIONIC DISPENSER CATHODE
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3497929 |
METHOD OF MAKING A NEEDLE-TYPE ELECTRON SOURCE
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3488549 |
DISPENSER CATHODE MATERIAL AND METHOD OF MANUFACTURE
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3474280 |
LAMPS USING SPHERICAL CATHODES
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3456311 |
METHOD AND APPARATUS FOR ADJUSTING INTERELECTRODE SPACING IN A CATHODE-RAY TUBE
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3452426 |
METHOD OF MAKING A CATHODE SLEEVE STRUCTURE
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3452425 |
METHOD OF MAKING A CATHODE SLEEVE STRUCTURE
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3448321 |
ELECTRIC INCANDESCENT LAMP AND METHOD OF MANUFACTURE
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3442008 |
METHODS OF MANUFACTURING ELECTRODES FOR CATHODE RAY TUBES
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3375569 |
Method of manufacture of structures having controlled porosity
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3312850 |
Relatively thick phosphor storage target having spaced holes for electron passage
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3307241 |
Process for making cathodes
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3294125 |
Electrode coil and method
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3265495 |
Method of manufacturing cathodes
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3257703 |
Composite electrode materials, articles made therefrom and methods of making the same
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3195005 |
Electrode and component therefor
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