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: An electron gun (1) for use in a cathode ray tube has brackets (20) connecting grids (2, 3, 4, 5, 6) to insulator rods (10). Electric conductors (11) extending to contact pins (12) embedded in a glass flange (13) are welded to a base (21) of the brackets (20). Legs (25) extend from the base (21) and are welded to the grids (2, 3, 4, 5, 6). Lugs (26) extend from the base (21) in opposite directions and are embedded in the glass rods (10). The brackets (20) provides stability to the grids (2, 3, 4, 5, 6), thereby preventing varying properties of guns (1) from one batch. The cathode ray tube is provided with the gun (1).

Abstract: A cathode ray tube has a phosphor screen and an electron gun. The electron gun includes an electron beam generating section and an electron beam focusing section for focusing an electron beam from the electron beam generating section onto the phosphor screen. The electron beam generating section and the electron beam focusing section are mounted in predetermined spaced relationship on plural insulator support rods. The electron beam focusing section includes at least one compound electrode formed of a first electrode member, a second electrode member and a plate-like electrode member sandwiched therebetween. The plate-like electrode member is fabricated from a material thicker than materials from which the first and second electrode members are fabricated. The plate-like electrode member is laser-welded to the first and second electrode members at points of edges of the first and second electrode members.

Abstract: A color cathode ray tube includes an evacuated envelope having a panel portion with a phosphor screen formed on an inner surface thereof, a neck portion, and a funnel portion connecting the panel portion and the neck portion, and an electron gun housed in the neck portion. The electron gun has a cathode and a plurality of focus grid electrodes including grid electrodes for forming a multistage focus lens for focusing an electron beam emitted from the cathode. The cathode and the focus grid electrodes are fixed in predetermined axially spaced relationship by a pair of bead glass.

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: An electron source includes: linear thermionic cathodes for emitting electron beams; an electron beam lead-out electrode which is disposed substantially in a parallel relationship with the linear thermionic cathodes and is formed with apertures for passing the electron beams therethrough; and a plurality of support members for supporting the linear thermionic cathodes each of which has a contact portion held in contact with at least a portion of the linear thermionic cathodes; wherein each of the apertures of the elctron beam lead-out electrodes is disposed so as to confront the contact portion of the support member.

Abstract: A method of manufacturing an electron gun component, in which the electrodes are positioned in a jig by means of positioning means which are located at the edge of the electrodes. The method does not use pins to position the electrodes. In an exemplary embodiment, the electrodes are stacked in the jig with clearance. The positioning means are located at the vertices of a polygon which comprise the apertures in the electrodes. If an electrode is tubular in shape, the positioning means and the apertures in the electrode are preferably located in one plane.

Abstract: An electron gun supporting member for securing and supporting an electron gun within a cathode ray tube, such as a Braun tube of a television receiver, is disclosed. The electron gun supporting member is comprised of a shield section, electron gun supporting sections and connecting sections. The function of the electron gun supporting sections is to secure and support the electron gun with respect to the cathode ray tube, while that of the connecting sections is to establish electrical connection between the last electrode of the electron gun and an electrically conductive layer formed on the inner wall of the cathode ray tube. The electron gun supporting sections and the connecting sections are bent obliquely outwards in a direction opposite to the direction of insertion of the electron gun into the cathode ray tube.

Abstract: An arc suppressing device for a cathode ray tube having an evacuated glass envelope which includes a funnel with a neck and a panel provided with a shadow mask. An electron gun is housed in the neck and includes a cathode and a plurality of electrodes supported by supporting beads. On the outer surface of the focusing electrode, at least one or more projecting metallic pieces pass through the supporting beads so that the ends thereof are exposed to the outside of the supporting bead. Between the ends of the projecting pieces and the inner surface of the neck, an electric field is formed to effectively prevent the occurrence of arcing in the bead channels.

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: A shadow mask type color cathode ray tube fitted with an in-line type electron gun having a control grid of a quadrupole structure, wherein the control grid has an elongated rectangular hole having a horizontal diameter H and a vertical diameter V wherein the relationship expressed by 1<H/V<1.4 is established.

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: A color picture tube, includes an envelope having a faceplate panel and a tubular neck interconnected by a funnel. A three-color phosphor screen is formed on the interior surface of the faceplate and a multi-apertured color selection electrode is spaced from the screen. An electron gun is disposed within the neck of the tube. The electron gun includes three cathodes and a plurality of spaced-apart electrodes, having substantially aligned apertures therethrough, for generating and directing three electron beams along paths toward the screen. Each of the electrodes is secured to a plurality of longitudinally extending insulative support rods by at least two oppositely disposed, integral attachment elements, each having a distal end, a proximal end and an appendage portion therebetween. The distal end of each attachment elements includes a bifurcated portion including spaced-apart grasping members to facilitate attachment to the support rods.

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 with an improved structure for providing accurately adjusted cut-off voltage. A novel process for producing the improved electron gun, and maintain substantially high uniformity of cut-off voltge in production. The electron gun comprises a plurality of grid electrodes including a first electrode mounted at the closest position to a cathode. The cathode is supported by a cathode base. The cathode base and the first electrode are provided in a pre-assembled form. The pre-assembly of the cathode base and the first electrode is supported by means of a holder which is fixed to glass beads together with other grid electrodes. In assembling of the electron gun, the distance between the cathode surface of the cathode and a plane surface of the first grid electrode, where an electron beam path is defined, is precisely adjusted during formation of the pre-assembly.

Abstract: The novel CRT has an electron gun mount assembly therein which is similar in construction to prior CRT's. The electron gun mount assembly includes a cathode for generating at least one electron beam and a plurality of successively spaced electrodes including a screen grid electrode, a focusing electrode and an anode electrode secured to one major surface of at least two longitudinally extending insulating support beads. A first gap of predetermined width extends between the anode electrode and one end of the focusing electrode. A second gap of predetermined width extends between the opposite end of the focusing electrode and the screen grid electrode. An opposite major surface of each of the support beads faces outwardly and has thereon an electrically-conducting coating having a longitudinal dimension, d. Suitable voltages are applied to the electrodes to generate electrical activity. The coating on each of the beads is spaced a distance 1.25.times.

Abstract: A bipotential electron gun for cathode ray tubes comprising an arrangement of a cathode, a control electrode, and an accelerating electrode, a first anode and a second anode such that the second anode is formed with windows in its large diameter cylindrical portion and the large diameter end portion of the first anode is mounted within the large diameter cylindrical portion and is fixedly supported by an insulating support member that extends through the windows such that the first anode is firmly supported and coaxially mounted between the first anode and the second anode which form the principal lens in a secure manner.

Abstract: An electron gun for a cathode-ray tube comprises a modular beam-forming region assembly and a main focusing lens which are affixed to at least two insulative support rods. The modular beam-forming region assembly includes a plurality of cathode assemblies, a control grid electrode and a screen grid electrode. The control grid electrode and the screen grid electrode are attached to a first major surface, of a common ceramic member and the cathode assemblies are attached to a second major surface thereof. A transition member is disposed between a metallized pattern on the first major surface of the ceramic member and the screen grid electrode. The transition member includes a substantially flat portion attached to the metallized pattern and two upright portions substantially perpendicular to the flat portion and substantially parallel to each other. The screen grid electrode is disposed between the upright portions and connected thereto by a plurality of step-like support members.

Abstract: An inline electron gun for generating and directing three electron beams, a center beam and two side beams, along initially coplanar paths includes an electrostatic main focusing lens for focusing the electron beams. The main focusing lens is formed by two spaced electrodes, each having three separate inline apertures therein. A first of the main focusing lens electrodes includes a first cylindrical portion having a diameter larger than the sum of the diameters of the apertures therein. A second of the main focusing lens electrodes includes a second cylindrical portion having a diameter larger than the diameter of the first cylindrical portion of the first main focusing lens electrode. At least part of the first cylindrical portion of the first main focusing lens electrode is located within the second cylindrical portion of the second main focusing lens electrode. The largest component of the main focusing lens is established by the first and second cylindrical portions.

Abstract: An electron-gun system is described in which the segments of the particularly long electrode neighboring the other electrodes are made of a material having a temperature expansion coefficient differing from that of the other electrodes.

Abstract: The electrodes in a tube, such as a cathode ray tube, are held in accurate alignment, particularly under conditions of high stress, by employing a series of glass rods along the electrodes with a plurality of U-shaped straps extending over the rods and forming a tight fit between the rods and the neck of the tube with the legs of the U being bowed outwardly under tension.

Abstract: A color cathode-ray tube according to the present invention includes an electron gun, in the neck portion thereof, aligned with the central axis of the neck portion of the cathode-ray tube by support members connected to the rear end portion of the electron gun to be in contact with the inner surface of the neck portion in addition to contactors connected to the front end portion of the electron gun.

Abstract: A CRT comprising an evacuated envelope having an electrically-insulating neck and a beaded electron-gun mount assembly in the neck. Portions of the surfaces of the beads facing the inner surface of the neck carry electrically-conducting coatings for suppressing arcing during the operation of the tube. The coatings and the claws of the electrodes embedded in the beads are positioned to minimize erosion of the patches during electrical processing of the electrodes.

Abstract: The electrodes of an electron-gun system of a color-picture tube are heated less as their distance from the cathode of the system increases. The electrode materials are so chosen with respect to their coefficients of expansion that no mechanical stresses are caused in the system structure despite the different temperatures.

Abstract: The present invention is an improvement in an electron gun assembly. Such a gun assembly includes a plurality of indirectly heated cathode assemblies and at least two spaced successive electrodes having aligned apertures therein for passage of a plurality of electron beams. The cathode assemblies include a plurality of cathode heaters which are attached to at least two electrically insulating support rods by a plurality of heater bead straps. Each of the heater bead straps includes a main body portion having a distal end and a proximal end. The proximal end has a bifurcated portion comprising a pair of closely spaced apart grasping members for embedment into one of the insulating support rods. At least one member of the pair of grasping members is angulated with respect to the main body portion to increase the retention of the heater bead straps to the insulating support rods.

Abstract: A color picture tube with an in-line multi-stage focusing type electron gun assembly which can suppress generation of spark discharges and which can be improved in withstand voltage characteristics. The electron gun assembly comprises a metallic shielding member facing the fluorescent screen and maintained at the anode potential. The shielding member is displaced, in the direction of a tube axis and toward the base, from an edge facing the base of an inner graphite coating formed on the inner wall of the neck tube by a predetermined distance or more. The metallic shielding member shields electrostatically the edge of the inner graphite coating from the grid electrodes and cathode electrode close to the base and at lower potentials. At least one of focusing voltage feed conductors for third and fifth grid electrodes is wired so as to run through a gap between the inner wall of the neck tube and a bead glass for supporting the electrodes of the electron gun assembly.

Abstract: The invention relates to disc-like metallic means for supporting the cathode assembly in a miniaturized cathode ray tube single electron gun structure. Its substantially planar construction with radially extending supporting leg elements incorporates shapings which achieve both compactness and ruggedness. The beneficial strengthening effects are provided by the integration of a rim on the disc portion with U-shaped cross-sectional shapings of the leg elements.

Abstract: An in-line electron gun assembly for a color television picture tube has a control grid and a center cathode disposed between two outer cathodes. The control grid and the cathodes are secured to a pair of insulating support rods. Each cathode is supported by a cathode support assembly comprising a cathode eyelet and a beading support member. Each beading support member varies in dimensions as a function of temperature and the center beading support member stabilizes at a higher operating temperature than the outer beading support members. The ends of the beading support members are embedded in a pair of oppositely-disposed insulating support rods. The center beading support member is formed of a material having a high thermal expansion coefficient and the outer beading support members are formed of a material having a lower thermal expansion coefficient.

Abstract: An in-line electron gun assembly for a color television picture tube has a center cathode disposed between two outer cathodes. Each cathode is supported by a cathode support assembly comprising a cathode eyelet and a beading support member. Each beading support member varies in dimensions as a function of temperature and the center beading support member stabilizes at a higher operating temperature than the outer beading support members. The ends of the beading support members are embedded in a pair of oppositely-disposed insulating support rods. The center beading support member is formed of a material having a low thermal expansion coefficient and the outer beading support members are formed of a material having a higher thermal expansion coefficient. The materials are chosen such that the outer beading support members expand more than the center beading support member but substantially equal to one another so that the cathodes are rigidly affixed to the support rods.

Abstract: A color television picture tube of three in-line gun type wherein a ring-shaped ferrite permanent magnet or magnets are disposed around a neck portion of the tube, at least a pair of mutually-opposing pole pieces made of highly permeable magnetic material are provided within the tube neck portion as a part of the gun assembly so as to be magnetized by the ring magnet or magnets and to form an electron beam magnetic focusing lens system. In the picture tube, the pole pieces are each of a substantially elliptical cross section as viewed from a plane perpendicular to the tube axis, and spaces are provided between an inner wall of the tube neck portion and the pole pieces to accommodate support rods for gun assembling.

Abstract: A novel electron gun assembly having at least one generally longitudinally-extending electron beam path includes a plurality of electrodes attached to at least two electrically-insulating support rods. Each of the support rods has a surface having at least two indexing cavities formed therein for aligning the support rods along the beam path.

Abstract: The electron gun structure comprises a cup shaped control electrode having a top provided with three aligned openings, and one ends of supporting members are secured to the outer wall of the control electrode near a lower opening. Each supporting member extends toward the top from the secured end and includes a portion separated from the outer wall. The other ends of the supporting members are embedded into insulating parts to position the control electrode with respect to other electrodes.

Abstract: In an electron gun, e.g. for a cathode ray tube, an anode is supported from another anode by spacers which fit between overlapping portions of the two anodes and locate in recesses in the two overlapping portions. The spacers are typically glass balls. The invention finds especial application in mounting of a final anode whose diameter is greater than the diameter on which rods supporting the other electrodes of the gun lie.

Abstract: The invention is directed to a picture tube comprising an electron gun installed within an evacuated envelope which receives various potentials supplied from a potential source. The electron gun comprises a cathode for generating an electron beam and a plurality of successively arranged electrodes for focusing and accelerating the electron beam. One or more supporting rod secures the electrodes. Each of the supporting rods comprises an insulator portion and a glass resistance portion. The glass resistance portion acts as a solid bulk resistor and secures in direct connection with at least one electrode of the electron gun. Consequently, potentials from the potential source are applied to certain electrodes through the glass resistance body. In a further embodiment the entire supporting rod consists of a homogeneous glass resistance body.

Abstract: A CRT comprising an evacuated envelope having an electrically-insulating neck and a beaded electron-gun mount assembly in the neck. The beads of the assembly are closely spaced from the inner surface of the neck. At least a portion of the surface of each of the beads opposite the neck carries a patch of chromium oxide.

Abstract: A color picture tube with an in-line multi-stage focusing type electron gun assembly which can suppress generation of spark discharges and which can be improved in withstand voltage characteristics. The electron gun assembly comprises a metallic shielding member facing the fluorescent screen and maintained at the anode potential. The shielding member is displaced, in the direction of a tube axis and toward the base, from an edge facing the base of an inner graphite coating formed on the inner wall of the neck tube by a predetermined distance or more. The metallic shielding member shields electrostatically the edge of the inner graphite coating from the grid electrodes and cathode electrode close to the base and at lower potentials. At least one of focusing voltage feed conductors for third and fifth grid electrodes is wired so as to run through a gap between the inner wall of the neck tube and a bead glass for supporting the electrodes of the electron gun assembly.

Abstract: A CRT comprising an evacuated envelope having an electrically-insulating neck and a beaded electron-gun mount assembly housed in the neck. The beads of the assembly are closely spaced from the inner surface of the neck. An electrically-conducting band is located against the surface, each bead opposite the neck. The band is electrically connected to and supported from one of the electrodes of the mount assembly.

Abstract: A color television display tube comprising three electron guns arranged in line and each comprising successively a triode part, a first lens electrode and a second lens electrode. The first lens electrode of each of the outermost guns is secured to insulating assembly rods by means of two suspension braces situated at an axial distance from each other in such manner that the brace situated nearer the triode part is secured to the outer surface of the first lens electrode remote from the central electron gun and the brace situated nearer the second lens electrode is secured to the outer surface of the first lens electrode facing the central electron gun. Such a construction results in a low thermal convergence drift.

Abstract: In a color television display tube the electron gun system constructed from three electron guns comprises a first group of corresponding electrodes and a second group of corresponding electrodes to be operated at a higher electrical potential than the first group. The electrodes in each group are positioned relative to each other by means of metal braces connected thereto. The ends of the braces are secured to insulating support rods. At least one group of corresponding electrodes is interconnected by means of one or more conductive contact springs surrounding the support rods and touching the surface of each electrode or of the brace connected thereto.

Abstract: A CRT comprising an evacuated envelope having an electrically-insulating neck and a beaded electron-gun mount assembly in the neck. The beads of the assembly are closely spaced from the inner surface of the neck. At least a portion of the surfaces of the beads opposite the neck is electrically conducting.

Abstract: An electron gun asembly comprising direct heated cathodes each having an electron emitting member fixed on a filament which is stretched between a pair of support means disposed face to face with each other on a substrate and a plurality of grid electrodes containing first grids, said cathodes and grid electrodes being secured with predetermined distance with one another by insulative support rods. Each of the cathodes has a means adjusting the spacing between the first grid electrode and the electron emitting member.

Abstract: Improved means are provided for supporting a thermionic cathode in a cathode ray tube electron gun structure. A dual-leg configurated wire component, evidencing minimal mass and low heat sink characteristics, is utilized to provide positive support for the cathode and promote rapid cathode warmup.

Abstract: A color television picture tube in-line gun assembly in which the individual guns are secured together with the aid of fastening clamps which are constructed to progressively tilt the outermost guns relative to the center gun during heating up of the tube in a manner to compensate for skewing of the beam axis as a result of such heating.

Abstract: This disclosure depicts and describes a unitized, in-line electron gun for television cathode ray tubes having a bead-type structure for mechanically supporting, spacing, aligning and electrically isolating gun components. This disclosure is particularly directed to an improved system of electrode support that absorbs stress induced during the mounting process to leave the gun structure substantially free of residual stress, thus reducing the incidence of bead fracture and electrode displacement.

Abstract: This disclosure depicts a quick-mount electron gun mounting means for use in a television cathode ray tube. The tube has a neck terminated by a base and includes adjacent to the base an electron gun support plate rigidly supported closely adjacent to the base by lead-in pins. The quick-mount gun mounting means include male-female socket components, with said gun having one socket component including means embedded in at least one of said beads, the plate having means defining the other socket component. The socket components provide for facile and secure plugging together of the gun and the base. The combination includes electrically conductive means connected between at least one of the lead-in pins and one of the gun electrodes. The male-female socket components provide also for the facile and secure plugging together of electrically conductive paths to transmit electrical voltages or currents between the lead-in pins and the gun electrodes.

Abstract: Suspension elements for the electrodes in a multibeam electron gun, especially for a color television picture tube, having a novel construction are provided which cause their associated electrodes to either rotate about their axes or to remain in position to compensate for convergence drift during the warm up phase of the tube's operation.

Abstract: An improved cathode heater filament electrical connection and support system for a three in-line electron gun color television picture tube. A pair of identical, thin, electrically conductive support rails electrically connect in parallel the filament leads of the three cathode heaters, with the support rails being spaced apart and disposed parallel to each other and aligned with the in-line direction and respectively offset on opposite sides from an in-line plane passing through the three cathode centers. A pair of integral tabs extend from each of the support rails to permit supportive connection to a plurality of insulating rods.

Abstract: A cathode ray tube wherein conductive supporting members of a focusing electrode, in combination with the conductive coating around the envelope, constitute an electrostatic multipole focusing lens.