Abstract: Some embodiments include a system, comprising: a high voltage enclosure; a cathode disposed in the high voltage enclosure; an anode disposed in the high voltage enclosure; a plurality of grids disposed in the high voltage enclosure between the cathode and the anode; a voltage source configured to generate a common grid voltage; and a voltage divider disposed in the high voltage enclosure, configured to generate a plurality of grid voltages based on the common grid voltage, and configured to apply at least two of the grid voltages to the grids.

Abstract: A device for lighting a room is described. The device has an envelope with a transparent face, the face having an interior surface coated with a cathodoluminescent screen and a thin, reflective, conductive, anode layer. There is a broad-beam electron gun mounted directly to feedthroughs in a base of the envelope with a heated, button-on-hairpin, cathode for emitting electrons in a broad beam towards the anode, and a power supply mounted on the feedthroughs at the base of the envelope that drives the cathode to a multi-kilovolt negative voltage. A two-prong snubber serves as an anode contact to permit the power supply to drive the anode to a voltage near ground. A method of manufacture of the anode uses a single step deposition and lacquering process followed by a metallization using a conical-spiral tungsten filament coated with aluminum by a thermal spray coating process.

Abstract: In an electron gun for use in a TWT, klystron, linear accelerator or other electron device, an electron gun header assembly and an input body assembly are coupled using a flexible bellows that allows the distance between the cathode and anode to be varied. As such, the perveance of the electron gun can be tuned, and the cathode magnetic field optimized for efficient operation. In addition, an external magnetic shield is adapted to be translated along the axial dimension of the electron gun to further optimize the cathode magnetic field and focusing characteristics to achieve improved electron gun performance.

Abstract: A light emitting device has a cathode-ray tube and power supply. The cathode-ray tube in an embodiment is optimized for emitting a broad electron beam, in one variation a dome-shaped diffusing grid is used to spread the beam. In another embodiment, the device has a base adapted for attachment to a standard lighting fixture.

Abstract: A light emitting device has a cathode-ray tube and power supply. The cathode-ray tube in an embodiment is optimized for emitting a broad electron beam, in one variation a dome-shaped diffusing grid is used to spread the beam. In another embodiment, the device has a base adapted for attachment to a standard lighting fixture.

Abstract: A conductive film isolated from an inner conductive film is formed on an inner wall of a neck. Assuming that, among a plurality of focusing electrodes constituting an electron gun, a position in a tube axis direction of an end on an anode side of an anode-side focusing electrode placed at a position closest to the anode side is P0; among electrodes supplied with substantially the same voltage as that of the anode-side focusing electrode and arranged continuously from the anode-side focusing electrode, a position in the tube axis direction of an end on a beam generating portion side of an electrode placed at a position closest to the beam generating portion side is P1; in the tube axis direction, a position of an end on the beam generating portion side of the conductive film is PL1 and a position of an end on the panel side of the conductive film is PL2, the position P0 is placed between the position PL1 and the position PL2.

Abstract: An X-ray light emitting phosphor film (22) such as a CsI film that converts an X-ray to light is formed on an input substrate (21) constituting an input part of an X-ray image detector. A surface portion of the X-ray light emitting phosphor film (22) is irradiated with high-energy light having a wavelength of 500 nm or less. The surface portion of the X-ray light emitting phosphor film (22) is locally sublimated and/or fused to be flattened by the irradiation with the high-energy light. The use of the high-energy light such as a laser beam makes it possible to efficiently and uniformly flatten the surface portion of the X-ray light emitting phosphor film.

Abstract: A cap can comprise an aperture, and an attenuator may block the aperture during at least one point in time. In one embodiment, the attenuator can include a cover that may be displaced by a spring. In another embodiment, such as an electron gun, may comprise a support cap with an aperture, a displaceable cover that may cover the aperture, and a spring. A material attached to the spring and acting as a fuse may release the spring and expose the aperture after an electrical current blows the “fuse”. In yet another embodiment, a method for using a tube may comprise evacuating the tube while a cover covers an aperture in the support cap of a electron gun that is at least partially in the tube and moving the cover to expose the aperture after the tube is sealed.

Abstract: The present invention provides a tension mask having a frequency distribution with improved vibration damping. The tension mask includes a center portion between two edge portions.

Abstract: Disclosed is an electron gun for a cathode ray tube capable of improving substantial resolution by improving the alignment of a triode portion. The electron gun includes a triode portion composed of at least one cathode for emitting electron beams, and a first electrode and a second electrode for controlling emission amount of the electron beams, a focus electrode and an anode electrode forming a prime lens for focusing the electron beams on a screen, and at least two guide holes housed in more than two electrodes for use of assembly besides electron beam passage holes, in which at least one guide hole is circular and at least one of the other guide holes is non-circular.

Abstract: A method of manufacturing an electron gun having a sub-assembly to interconnect the beaded unit and the base of the electron gun. This sub-assembly is manufactured by making a pattern of apertures in a planar element, thereby forming a number of securing elements. In the next step, portions of the securing elements are bent out of the plane of the planar element and then connected to an insulating plate, thus forming the sub-assembly of securing elements and insulating plate. This sub-assembly is preferably provided with funnel-shaped apertures to lead the electric leads of a number of gun electrodes through the insulating plate. This allows an accurate and easy interconnection of the electric leads and the pins of the base.

Abstract: The specification describes a method and apparatus for electron beam lithography wherein a Wehnelt electron gun is modified to improve the uniformity of the electron beam. A mesh grid is applied to the Wehnelt aperture and the mesh grid functions as a multiple secondary emitter to produce a uniform beam flux over a wide area. The grid voltage of the modified gun is substantially lower than in a conventional Wehnelt gun, i.e. less than 100 volts, which can be switched conveniently and economically using semiconductor drive circuits.

Abstract: Method and apparatus for manufacturing an electron gun. A beam spot coefficient is obtained from an electrostatic lens magnification and a spherical aberration coefficient of a set resistance distribution. Then, a first process loop is executed to select another resistance distribution that provides an approximate minimum value of the beam spot coefficient. It is then determined whether the beam spot coefficient is an approximate minimum value. The first process loop is repeatedly executed until the beam spot coefficient is determined to be equal to the approximate minimum value. At this point, a second process loop is executed to confirm the minimum value of the beam spot coefficient using an aberration-independent function that is dependent upon the electrostatic lens magnification and is not dependent upon the spherical aberration coefficient.

Abstract: A method of manufacturing a cathode ray tube comprising the steps of providing a stem with a flange having an outer diameter larger than an inner diameter of a bottom end of a neck and smaller than or identical with an outer diameter of the bottom end of the neck, applying a liquefied frit glass onto an upper portion of the flange, hardening the liquefied frit glass applied on the upper portion of the flange, mounting an electron gun onto the stem, fitting the stem into the inside of the neck such that the upper portion of the flange applied with the frit glass contacts a bottom end of the neck, and providing a frit seal between the upper portion of the flange and the bottom end of the neck by heat-treating the frit glass between them.

Abstract: In order to provide a method of producing a cathode ray tube in a manner which well matches with a usual technique of producing a cathode ray tube by forming a spiral high-resistor on an inner face of a glass tube, in an electron gun of which a main focusing lens is configured by the spiral high-resistor, the step of fritting seal rings to both ends of the glass tube in which a hole is opened in the center portion; the step of applying a high-resistor paste to the glass tube, drying the paste, and then forming a spiral structure in the high-resistor film; the step of firing at 420 to 550 deg. C.; and the step of combining other electron gun parts to form the electron gun are included, and the spiral high-resistor is formed by a high-resistor paste in which ruthenium oxide is added to a glass material having a softening point that is lower than the annealing point of the glass tube.

Abstract: A traveling wave tube having an electron gun and a collector assembly is provided. The assemblies include a sleeve placed around an isolator. The sleeve is either heat shrunk or heat deformed around the isolator. Heat shrinking is performed when the sleeve radius is initially larger than the isolator radius. During heat shrinking, the sleeve is heated to cause the sleeve radius to increase and be larger than the isolator radius. The sleeve is then placed around the isolator and cooled causing the sleeve to contract upon the isolator. Heat deformation is performed when the sleeve radius is initially smaller than the isolator radius. During heat deformation, the isolator is inserted into the sleeve. The isolator and the sleeve are then heated so that the sleeve expands to a constrained amount of expansion and then deforms. The sleeve and the isolator are then cooled causing the sleeve to contract upon the isolator.

Abstract: A method for manufacturing an electron gun for a cathode ray tube. The method comprises a first step in which a number of securing means are made in a planar element (e.g. plate or strip), a second part in which the securing means are secured to an insulating support rod, a third part in which the insulating support rod-securing means assembly is detached from the planar element, whereafter connections are made to a stack of electrodes to form the electron gun.

Abstract: An electron gun comprising at least one cathode for emitting electrons, a cylindrical device, a first electrode layer provided on the cathode side of inner surface of the cylindrical device, a second electrode layer provided on a panel side of inner surface of the cylindrical device, and a third electrode layer provided between the first electrode layer and the second electrode layer, a ratio of a gap between the second electrode and the third electrode to a gap between the first electrode and the third electrode being defined more than 1, wherein the ratio of the gap between the second electrode and the third electrode to the gap between the first electrode and the third electrode is 1:1 to 2, the cylindrical device is made of ceramic, and further comprising at least one resistive layer provided on the inner surface of the cylindrical device, and at least one conductive layer provided between the adjacent electrode layers.

Abstract: In a method of manufacturing a cathode-ray tube having an electron gun in which a voltage-dividing resistor is disposed, metal straps are disposed on the right and left of the electron gun. When metal deposited films for stabilizing a potential are formed on the inner wall of a neck portion of corresponding portions or the like by a radio-frequency heating means, metal deposited films of substantially the same thickness can be formed.

Abstract: An electron gun assembling apparatus has a cathode driving mechanism (12,13) for moving a cathode (1), a laser displacement gage (14) to measure a height of a surface of the cathode (1) in a non-contact manner at a cathode surface measuring position outside an electron gun assembly (24), an electric micrometer (11) to measure a height of an upper surface of a first electrode (3) in the electron gun assembly (24), and an electric micrometer (8) to measure a height of a lower surface of a second electrode (4) in the electron gun assembly (24).

Abstract: An electron gun cathode structure includes a support member made of an insulating material, a first grid fixed to the support member, and a cathode disposed on the side of the support member opposite to the first grid. A thermal expansion .DELTA.L.sub.S /L.sub.S of the insulating material constituting the support member due to heat from the cathode is larger than a thermal expansion .DELTA.L.sub.G /L.sub.G of a material constituting the first grid due to heat from the cathode. A manufacturing method of an electron gun cathode structure includes preparing a member including a first face and a second face having a step therebetween, a height of the step being equal to a predetermined distance d.sub.12, placing a first grid on the first face, placing a spacer on the second face, placing an insulating support member on the first grid and the spacer, and grinding a top surface of the spacer opposite to its surface that is fixed to the support member so that an actual distance d.sub.12 becomes a desired value.

Abstract: An image display apparatus includes a rear electrode for controlling a first quantity of electrons in an electron beam. Also included is an electron beam generating source for generating the electrons which travel in parallel with each other and an extraction electrode for extracting the electron beams from the generated electrons. A control electrode is also included for selectively controlling a second quantity of electrons in the electron beams which have passed through the extraction electrode and a horizontal deflection electrode for electrostatically deflecting the electron beams. A vertical deflection electrode is provided for deflecting the electron beams which have passed through the horizontal deflection electrode. The vertical deflection electrode has a first comb-shaped conductive sheet having first parallel members and a second comb-shaped conductive sheet having second parallel members.

Abstract: Vacuum tube comprises a ceramic element and method of interconnecting a ceramic element and a conductive element. A conductive connection consisting of a first layer containing silver and a filler and a second layer containing silver, gold or copper is formed between the ceramic element and the conductive element. The two above-mentioned layers are bonded together by means of diffusion bonding.

Abstract: Method of manufacturing an electron gun comprises the steps of forming a plurality of electrode layers on the inner surface of at least one tube, providing at least one conductive layer on the surface of the tube, providing a pair of holders so as to hold both ends of said tube, providing a voltage supplying device on one of the pair of holders, and welding a plurality of electrodes forming a part of a triode to the other of the pair of holders.

Abstract: In assembling an electron gun (10), parts (11 to 18) are placed on supports (21) on the support base (2). The angle of a supported G3 grid (15) can be adjusted by moving the side of the G3A grid (15A), because the support (21) for the G3 grid (15) holds only the rear of the G3B grid (15B). Accordingly, in the event the G3A grid (15A) and the G3B grid (15B) are welded together out of position, adjuster pins (5) can be inserted into the guide holes (61) of the G3A grid (15A) without being bent, thereby adjusting beam holes (62) of G3A grid (15A) to coincide with the beam holes (62) of other grids. Accordingly, the beading apparatus (1) allows the electron gun (10) to be manufactured with considerable precision.

Abstract: A compact, high power electron gun having enhanced thermal and mechanical stability which incorporates a mechanically coupled, self aligning structure for the anode and cathode. The enhanced stability, and reduced need for realignment of the cathode to the anode and downstream optics during operation are achieved by use of a common support structure for the cathode and anode which requires no adjustment screws or spacers. The electron gun of the present invention also incorporates a modular design for the cathode, in which the electron emitter, its support structure, and the hardware required to attach the emitter assembly to the rest of the gun are a single element. This modular design makes replacement of the emitter simpler and requires no realignment after a new emitter has been installed. Compactness and a reduction in the possibility of high voltage breakdown are achieved by shielding the "triple point" where the electrode, insulator, and vacuum meet.

Abstract: An electron gun such as used in a cathode ray tube (CRT) includes an Einzel lens having charged G3, G4 and G5 grids for focusing an electron beam on the CRT's display screen. The G3, G4 and G5 grids are cylindrical and have the same inner diameter, with their respective longitudinal axes colinear and aligned with the electron beam axis. Where T is the thickness of a grid and L is the G3-G4 or G4-G5 spacing, or gap, shielding against stray electrostatic fields within the grids arising from stray electrons on either a grid-supporting glass bead or on the inner surface of the CRT's neck portion is provided by maintaining the relationship 3.0.gtoreq.T/L.gtoreq.0.75. Another embodiment employs thinner grids having a thickness t with outward turned end flanges, or folded edges, disposed about facing edges of adjacent grids having a thickness T, where T>t and the above-stated relationship of T/L is maintained.

Abstract: Disclosed is a cathode assembly of an electron gun for a color cathode ray tube in which a heater support structure is improved. The cathode assembly of an electron gun for a color cathode ray tube comprising three cylindrical sleeves which are arranged in an in-line type, a base metal which is located at the upper end of the sleeves, and of which the surfaces are coated with thermal electron emitting material, a heater which is located on the inner portion of each of the sleeves and having two parallel terminals which are exposed out of the sleeves, and a heater fixture block in which three pairs of welding terminals corresponding to the three heaters and two signal lines for forming an electrical circuit along with the welding terminals are provided in the lateral surface and two parallel bead glasses for supporting the sleeves and the block. The heater support structure is simple and the stability thereof is improved. Also, the heater is easily assembled to have a high productivity.

Abstract: A laser welding method for preparation of an electron gun of a color cathode-ray tub. This laser welding comprises the steps of forming a coining part on an evaporation section of a weld zone of an upper part to be welded to a lower part, and focusing a laser beam on a bottom surface of the coining part. This coining part has a diameter larger than a diameter of the evaporation section and is formed in such a manner that it permits the weld zone of the upper part to have a predetermined thickness. In accordance with this laser welding, a weld nugget formed at the juncture between the upper and lower parts by is enlarged in its diameter and, as a result, increases the weld strength between the upper and lower parts. The coining part has a bottom surface of a plane surface or a curved surface. This laser welding can weld all of the parts of the electron gun even when an upper part to be welded to a lower part is thicker than the lower part and permit the welding condition to be easily determined.

Abstract: A method of manufacturing a cathode ray tube is provided for comprising a neck portion 4 in which an electron 5 having resilient elements 14 is secured. The method comprises a manufacturing step in which the electron gun 5 is inserted into the neck portion 4 by means of a managing tool 57 which serves to press together the resilient elements 14. Viewed in the axial direction, the managing tool 57 is located outside and clear of the neck portion 4.

Abstract: An electrode structure comprising a plurality of beam control electrodes, a plurality of electrically insulating spacers disposed between each neighboring members of the beam control electrodes, an electrode substrate, a plurality of metallic pins planted on the beam control electrode so as to extend therefrom through the electrode substrate, and a fixing member mounted on each of the metallic pins from rear of the electrode substrate for retaining the beam control electrodes.

Abstract: A cathode ray tube comprising an electron gun having a number of electrodes with securing members and a number of supports of electrically insulating material, said supports and electrodes being interconnected by means of serrated clamping members. By virtue of this construction, the microphonic behavior of the electron gun is improved.

Abstract: An integrated grid (G1/G2) assembly having enhanced mechanical strength and rigidity is provided for use in an electron gun assembly of a cathode ray tube (CRT). In the integrated grid assembly, the first and second grids (35 and 40, respectively) are fixed in relationship to one another, both axially and radially, by means of an insulating element (50) and a collar element (55). Brazed joints are preferably provided at the interface of the insulating element (50) with the second grid (40) and the collar element (55) to enhance the mechanical strength and rigidity of the assembly. An integrated grid (G1/G2)/anode assembly may be provided by mounting anode assembly (45) fixedly with respect to second grid (40) by means of second insulating element (60) and second collar element (65). Methods for assembling the integrated grid assemblies are also disclosed.

Abstract: An electron gun heater supporting structure includes a pair of supporting pieces respectively mounted on separate opposed glass beads of an electron gun and U-shaped connecting pieces disposed between the pair of supporting pieces for welding terminals of a heater thereto, the connecting pieces including position determining elements for determining the positions of the connecting pieces relative to the supporting pieces for welding them together. According to the present invention, the welding positions can be exactly determined and the uniformity of heater positions can be realized.

Abstract: The disclosure concerns electron tubes. A tube such as a cathode-ray tube consists of several parts, namely the stem, the neck, the cone and the screen of the front face. To build a tube such as this more compactly while, at the same time, improving the quality of the fabrication, a new construction of the neck is proposed. In the prior art, the neck is a glass tube to which there is soldered a glass stem through which pass the connection terminals towards the various electrodes, internal to the tube. Here, the neck is built in the form of a stack of alternating metallic rings and ceramic rings. The metallic rings are used for the supporting of and electrical connection to the internal electrodes. The ceramic rings are used to insulate the metallic rings. The brazings between metallic rings and ceramic rings provide for vacuum tightness. The base of the tube is a ceramic washer without drillings other than lateral ones for the connections to pass through.

Abstract: The present invention relates to an electron gun retaining a cathode and a plurality of electrodes with a pair of bead glasses and a method for manufacturing the same, wherein each of the bead glasses are provided with a convex portion at a position where a bead support for an electrode is buried on a side of the electrodes, each of bead bases of a beading apparatus on which the bead glasses are disposed is formed with a concave portion at a position corresponding to the convex portion of the bead glass, the bead glasses disposed on the bead bases are heated and softened, the bead supports for the cathode and the plurality of electrodes are buried and secured in the bead glasses, and the bead glasses each include convex portions on a side opposite to the electrodes.

Abstract: By using micro-connection techniques, for example by means of ceramic glass and conducting glass, an electron-optical system can be manufactured with which the emitted beam can be deflected through 90.degree. within a very short distance (of the order of several mm).

Abstract: The invention relates to a method of manufacturing an electron gun for use in a cathode ray tube. The electrodes of the gun have plate-shaped fastening members (19) which at the free end partly surround an aperture (45). One step of the method is the bonding to each other of the electrodes and the supports (21, 22) by softening the supports and making the fastening members penetrate the supports. The protruding part (44) of the fastening member is at an angle with the direction of penetration, such that a constrained material flow through the aperture (45) develops. Thus, the fastening members (19) cool down and are clamped along various lines (46, 47, 48), which leads to an improved microphonic behaviour.

Abstract: An electron gun for an electron beam device comprises a vitreous elongate tubular body (22) having a plurality of electrodes (24, 27 to 31 and 33 to 37) provided therein. Electrical connections (50, 52, 54) to at least some of these electrodes comprise respective conductors extending within the thickness of the wall of the tubular body (22). The tubular body is made by uniting inner and outer cylindrical members under the influence of heat while drawing them under sub-atmospheric pressure onto a profiled mandril, the electrical connections (50, 52 and 54) having been prepositioned on the inner cylindrical member.

Abstract: A method of manufacturing a cathode ray tube, in which the positions of the tube envelope and the gun assembly are adjusted so their respectively longitudinal axes coincide, and then fixed against non-axial movement prior to insertion and sealing of the gun assembly into the neck of the envelope, wherein the gun assembly position is fixed by clamping at least three of its connector pins.

Abstract: A multibeam electron gun comprises two spaced successive electrodes individually held in position from a common electrically-insulating support. Each of the electrodes has at least three beam-defining apertures therein. Each of the electrodes also has two dissimilarly shaped alignment apertures therein which are mutually aligned so that the beam defining apertures are accurately aligned along common axes in a statically determined manner.

Abstract: A multibeam electron gun comprises two spaced successive electrodes individually held in position from a common electrically-insulating support. One electrode comprises a single metal plate having at least three electron-beam defining first apertures therein. The other electrode is a composite structure comprising a support plate and a second metal plate having at least three electron-beam-defining second apertures therein. Each of the first and second plates includes substantially triangularly-shaped alignment apertures which are mutually aligned so that the beam-defining apertures are aligned along common axes.

Abstract: An electron gun system for a three beam color display tube. Slot-shaped openings are provided in the sides of cup-shaped focusing electrodes of the system to facilitate alignment during assembly. The electrodes are stacked on a jig having a pin passing through central electron beam apertures of the respective electrodes. Arms having V-shaped ends are then passed through the slot-shaped openings until they engage collars of the electrodes which define the apertures in the respective electrodes.

Abstract: A cathode support, in an electron gun of a cathode ray tube comprising four lamellae (22, 24, 25, 30) which are connected together by means of an electrically insulating sealing glass (23). A first one of the lamella (22) engages a first electrode (10) of the electron gun. Second and third lamellae (24, 25) are situated substantially in one plane, are electrically-insulated from each other, and are cathode filament. The cathode shaft (33) is suspended from a fourth one of the lamellae (30). The cathode support is well suited for automated mass production.

Abstract: For the purpose of the exact position adjustment and mounting of the cathodes (3) in their supporting plates (4) outside the system of a TV-Picture tube electron gun, the fitting position of the supporting plate and the fitting positions of the cathodes in this supporting plate are transferred to the outside of the system with the aid of a measuring head comprising independently guided spacing jigs (8, 10) for transferring the fitting position instead of having to use a limit stop lying outside the system.

Abstract: An electron gun for a camera tube includes an anode and a cathode. The cathode is assembled in a cathode support which can very readily be adjusted relative to the anode in the non-connected condition. In particular, the cathode support and the anode are movable radially with respect to each other and with respect to an axis. An emissive cathode surface and a part of the anode extending perpendicular to the axis remain accurately parallel to each other during the radial movement. As a result of this it is possible to cause the central path of the generated electron beam and the gun axis to coincide so that extra correction coils for aligning the electron beam may be omitted.

Abstract: The present invention is an improvement in an electron gun for use in a cathode-ray tube. Such a gun includes a cathode assembly and at least two spaced successive electrodes having aligned electron beam apertures therein. The improvement comprises one of the two electrodes having a plurality of alignment apertures disposed around the periphery thereof. A plurality of insulative support assemblies are referenced to the plurality of alignment apertures and interconnected to the one electrode. Each of the support assemblies also includes at least one support plate having a locating portion which is attached to the other electrode. A method is disclosed for aligning the electron beam apertures of the two successive electrodes.

Abstract: In the novel method, before an electron-gun mount assembly is sealed into the neck of a CRT, at least the high-voltage electrodes and the adjacent portions of the focus electrodes are dipped into an aqueous solution consisting essentially of hydrogen peroxide and water. The solution contains substantially more than 10, and preferably about 30 to 50, weight percent of hydrogen peroxide.