Abstract: A projection television receiver comprises at least one cathode ray tube for receiving video signals and projecting images therefrom, the tube including a face; a lens mounted adjacent to the face for focusing the images projected by the tube; and a coolant disposed between the lens and the face for absorbing and dissipating heat from the tube, the lens and the coolant having substantially the same refractive index for reducing reflection. The coolant may be a mixture of glycerol and ethylene glycol including about 20 to about 40% by weight of glycerol.

Abstract: The present invention relates to a cathode ray tube suitable for use with a flat type cathode ray tube in which a material from which a secondary electron is emitted by the impingement of an electron beam is exposed on a surface of an area of a first panel portion (2) having on its inner surface formed a phosphor screen on which the electron beam from an electron gun impinges and an insulative material which forms a second panel portion (3) is exposed on an inner surface of the second panel portion (3) opposing the first panel portion (2) wherein the secondary electron is accumulated to present a predetermined high potential state so that an electric field is prevented from being disturbed in a path of the electron beam.

Abstract: This invention relates to a cathode ray tube which uses a tension band to afford an implosion protection. The cathode ray tube of this invention includes a panal (21) formed of a face portion (4) which is respectively formed as a curved surface and a skirt portion (5). A mold match line (23) of this panel (21) is formed so as to substantially follow the boundary between the face portion (4) and the skirt portion (5) and a tension band (29) for use in implosion protection is wound around this mold match line (23). Accordingly, the tension of the tension band can effectively be transmitted to the entire periphery of the face portion and thus the implosion protection of the panel can be increased.

Abstract: Disclosed is a projection tube containing a coolant comprising a liquid mixture of ethylene glycol and water filled in the space between a phosphor screen panel and a transparent face panel which is set up at a certain distance in front thereof, wherein the coolant is incorporated with 10 ppm to 20 wt. % of an ethylene oligomer. The present projection tube is an excellent product free from a decrease in transmittance due to the coloring of the coolant in operation at a high temperature.

Abstract: In a color cathode ray tube, a vacuum envelope is provided with a plurality of necks and a plurality of funnels for coupling the respective neck to a single panel. A plurality of electron gun assemblies are received in the neck, respectively and a plurality of deflection yokes are mounted around the funnels, respectively. A screen is formed on the inner surface of the faceplate of the panel and is defined by a plurality of continuous segment regions each of which is scanned with electron beams from the corresponding electron gun assembly and deflected by corresponding deflection yoke. A shadow mask is received in the panel and is faced to the screen. The shadow mask has a plurality of effective row and column regions corresponding to the segment regions and a noneffective region for surrounding and partitioning the respective segment regions.

Abstract: A hollow enclosure has first and second ceramic walls interconnected and hermetically sealed by first and second compact coupling assemblies. In one form, each coupling assembly includes a first flange portion, a web portion and second flange portion. The first flange portion of the first coupling assembly is fritted to a first annular edge of the first ceramic wall. The first flange portion of the second coupling assembly is fritted to a second annular edge of the second wall. The second flanges of the coupling assemblies are then placed against one another and laser welded, without the need for thermal clamps.

Abstract: In a color cathode ray tube, a panel having a single faceplate is coupled to a plurality of necks through a plurality of funnels, respectively. A plurality of electron gun assemblies are received in necks and a plurality of deflection units are mounted around the funnels, respectively. A screen is formed on an inner surface of faceplate and has a plurality of continuous segment regions each of which is scanned with the electron beams emitted from the corresponding electron gun assembly and deflected by the corresponding deflection unit. A shadow mask is so supported in the panel as to face the faceplate. The electron gun assemblies adjacent each other so arranged as to have a relative distance GS between the central axis thereof:GS=m.multidot.

Abstract: A front assembly is disclosed for use in a color cathode ray tube. The assembly according to the invention comprises a glass faceplate having a target area with a pattern of phosphor deposits covered with an electron-pervious electrically conductive metallic film. A shadow mask support assembly includes a glass frame sealed to and constituting an integral part of the tube envelope for supporting a shadow mask in precise spaced adjacency to the target area. The frame has an electrically conductive frame coating on at least a portion thereof. An electrically conductive foil shadow mask adapted to be charged with a high voltage is mounted in tension on the frame in electrical contact with a conductive frame coating. Conductive means which may comprise spring means is in contact with the mask or the conductive frame coating and the metallic film or a conductive extension thereof for conducting high voltage on the mask to the metallic film.

Abstract: An electron tube comprising a window having a radiation-sensitive layer. The window is laid on a bearing surface of an envelope normal to the tube axis. There is no sealing material in the seam between the bearing surface and the window. The seam is sealed hermetically by a mass of indium or an indium alloy in which a metal wire is embedded along the circumference of the seam. The wire can be soldered with indium or an indium alloy. The seal is made by locally melting the indium or the indium alloy by a heated ultrasonically vibrating heat transfer member. The heat transfer member traverses the circumference of the seam.

Abstract: A flat panel tensed foil shadow mask registration system includes three radially disposed grooves on the panel and three oppositely disposed grooves on the frame that supports the tensed mask. Three spherical balls serve to align the panel and the frame in a precise relationship. The balls are permitted to roll in the grooves and one of the grooves in each pair is shorter than the other to restrict the range of positions of the ball in the other groove of each pair when the panel and frame are in the precise relationship.

Abstract: Indexing means are disclosed for use in the indexing of components having planar mating areas. The indexing means comprising three V-grooves located in the mating area of a first of said components, and three indexing protuberances fixed in the mating area of a second of said components in apposition to said V-grooves for mating in registration with said V-grooves. The indexing means according to the invention are characterized by the grooves each having a subtended angle in the range of 34 to 75 degrees, and preferably, 53 degrees. The indexing means according to the invention are especially suited for application to television manufacturing, particularly in the precision indexing components of a color cathode ray tube having a tension foil shadow mask.

Abstract: A cathode-ray tube with a target face consisting of electron-absorbing and nfrared emitting islands of material on a thermally-conductive substrate. A modulated electron beam scanned over a regular array of such islands induces a mid or far infrared image in the array. The tube envelope has an infrared-transparent window through which the image may be viewed by infrared detectors or imagers.

Abstract: A support frame for supporting a tensed mask adjacent to a flat panel tube and wholly within the tube includes an outer flange, a shelf extending from the flange parallel to the flat panel and providing a support surface for the tensed mask and a skirt directed away from the flat panel and adapted to join with the remainder of the tube. The configuration provides a very rigid support frame for resisting deformation when not bonded to the other tube elements, such as during screening of the panel when the support frame alone bears the forces exerted by the tensed mask.

Abstract: Projection television display tube comprising an evacuated envelope having a display window provided on its inside with a display screen, a transparent second window which is disposed in front of said display window on its outside, and a transparent coolant flowing through the space between the display window and the second window, said coolant conveying the heat taken up at the display window through a cooling member to the atmosphere. The coolant is also in thermally conducting contact with a latent heat accumulator, so that an effective cooling is obtained even at peak loads of more than 40 W, and without external pipes.

Abstract: A liquid-cooled projection tube apparatus has a projection tube, a metal plate having an opening and fixed in close contact with a face plate of the projection tube, and a transparent plate made of resin fixed in close contact with the metal plate. A space surrounded by the face plate, metal plate and transparent plate is filled with a liquid. The transparent plate has a groove, and the metal plate has a projection around the opening which is fitted into the groove so that the transparent plate is easily positioned with respect to the metal plate and that the liquid is sealed within the space.

Abstract: A process for making a fluorescent display device capable of accomplishing the mass production of a tipless fluorescent display device with good reliability and productivity is disclosed. The process is adapted to carry out, in a single chamber, a step of hermetically bonding an anode substrate and a casing together to form a hermetic envelope and a step of sealing the envelope in vacua.

Abstract: A tensed mask cathode ray tube has a support frame supporting a tensed mask adjacent to a flat or cylindrical panel wholly within the tube. The support frame includes an outer flange, a shelf extending radially inwardly from the flange and providing a support surface for the tensed mask, and an elongated skirt directed rearwardly from the shelf and adapted to join to the remainder of the CRT. The support frame forms a major part of the CRT envelope and includes strengthening ribs extending from the outer flange to the elongated skirt. The support frame resists deformation by tensile forces exerted by the tensed mask and discontinuity stresses imposed by the flat panel upon tube evacuation. The Q-distance between the mask support surface and the inner surface of the flat panel is determined by the support surface being offset from the seal surface.

Abstract: A display window (11) of a display tube is manufactured from a plate (21) having grooves (22), which plate is fused to a plate (20), so that ducts (25) are present in the display window (11). The phosphor screen (14) is provided on the inside of plate (20). The ducts (25) communicate at one end with a common supply duct (26) having an inlet aperture (27) and communicate at the other end with a common exhaust duct (28) having an outlet aperture (29). A coolant is forced through the ducts (25) for cooling the phosphor screen (14).

Abstract: A cathode ray tube of the type which comprises a tube body having a face plate, and a safety panel bonded to the front surface of the face plate through an interlayer of a cured adhesive resin composition. The adhesive resin composition comprises an unsaturated alkyd resin obtained from an unsaturated dicarboxylic acid and a dihydric alcohol, a polymerizable monomer capable of dissolving the unsaturated alkyd resin an organic peroxide catalyst, an organometal compound accelerator, and a chelating agent for the metal in the organometal compound accelerator.

Abstract: A color display tube comprising a display window which changes into a skirt which is substantially parallel to the axis of the tube via a strongly curved part. The inner surface of the window changes into the inner surface of the skirt via a strongly curved surface having a radius of curvature r. The outer surface of the window changes into the outer surface of the skirt via a strongly curved surface. The display window comprises on its inside a substantially rectangular display screen and a shadow mask at a short distance in front of the display screen, which mask is supported in the corners of the display window by suspension means fixed in the skirt. In the proximity of the strongly curved transition the skirt has a thickness d. In a plane perpendicular to the tube axis the distance D between the boundary of the luminescent material of the display screen and the outer surface of the skirt throughout the circumference of the window is substantially equally large and for r.ltoreq.

Abstract: A cathode-ray tube comprising an evacuated envelope including a glass part and an electrically-conductive coating adhered to the glass part. The coating in the form of a patch or stripe consisting essentially of a major weight proportion of metallic silver particles, preferably in the form of flakes, and a minor weight proportion of lithium silicate binder. The electrically-conductive stripe or patch may be used to assure the electrical connection between an electrically-conductive metal body attached to and having a surface contiguous with a surface of the envelope and an electrically-conductive layer supported from that surface. The stripe or patch is applied from an aqueous slurry of silver particles and lithium silicate and is dried to a substantially water-insoluble, abrasion-resistant coating without or with high-temperature baking.

Abstract: In this invention, disposed in front of a front panel (1a) of a cathode ray tube (1) is a transparent panel (2) through a metal spacer (3) which serves also as a heat radiator, a liquid tight space (5) is formed between the front panel (1a) and the transparent panel (2), a transparent liquid coolant (6) is sealed in the space (5), a protruded portion (3C) is provided on at least the upper end portion of the transparent panel (2) and an extended space (5A) into which the liquid coolant is injected is formed between the protruded portion and the metal spacer (3), whereby it is possible to effectively radiate the heat generated in the front panel (1a) of the cathode ray tube (1).

Abstract: A self-adhering base for a cathode ray tube has a circular array of connector pin apertures, three of which are sized to create a force fit with their associated pins. A first high voltage pin aperture is sized smaller than its associated pin, and the remaining two apertures, which are located approximately equidistantly from the first aperture, are slot-shaped. The slots are oriented to have their long axes intersect the first aperture. Such a self-adhering base is useful both as an in-process base during tube manufacture, and also as a permanent base on the finished tube.

Abstract: A shadow mask type cathode-ray tube includes a rectangular faceplate having curvature along its minor axis but no curvature along its major axis. The shadow mask of the tube also has curvature along its minor axis and no curvature along its major axis. The mask is of a type of steel having a linear coefficient of thermal expansion of less than 3.times.10.sup.-6 .DELTA.l/l/.degree.C.

Abstract: In a shadow mask type color picture tube, the radius of curvature of the peripheral portion of the inner surface of a faceplate on which a phosphor screen is formed is set to be smaller than that at the central portion thereof.

Abstract: An improved image pickup tube has an insulating envelope with precisely formed inside and outside surfaces. The inside surface of the envelope has a diameter the midpoint of which lies on a longitudinally extending first mechanical axis. An electron gun is aligned with the first mechanical axis. The precisely formed outside surface of the envelope is substantially coaxial with the inside surface. The outside surface has a diameter the midpoint of which lies on a second mechanical axis that is substantially coincident with the first mechanical axis and the optical axis.

Abstract: An improvement in a tension mask type color cathode ray tube comprising an envelope funnel that includes a bell portion, one extremity of which has a sealing land. The tube further comprises a flat face panel formed of a material having a predetermined temperature coefficient of expansion. The panel has a target area adapted to receive a pattern of luminescent color phosphor deposits. A sealing surface circumscribes the target areas. The improvement concerns a constituent structure which is disposed between the funnel sealing land and the panel sealing surface and which is frit sealed therebetween. The structure defines a central opening which is dimensioned to enclose the panel target area and it is formed of a material having a temperature coefficient of expansion approximating that of the face panel. The structure itself comprises means which define a support surface that confronts the target, which surface is adapted to fixedly receive a tensed color selection mask.

Abstract: A faceplate assembly includes a faceplate flange, a faceplate member and a sealing material, such as a glass frit, for sealing the faceplate member to the faceplate flange. Three gauging members, integral with the flange, are in contact with the faceplate member to ensure that the faceplate member is sealed parallel to the faceplate flange and at a predetermined distance therefrom.

Abstract: An electron tube is disclosed in which an envelope glass bulb and a glass stem having an electron gun assembly mounted thereon and accommodated within the bulb are sealed to each other. The sealed interface portion between the bulb and the stem incorporates concentrically with the electron gun assembly a metallic ring member made of an alloy or metal material having a good bonding ability to the glass materials of the bulb and the stem. The sealing is effected by a high frequency heating of the metallic ring member. An ohmic heating may be additionally used.

Abstract: A cathode ray tube (1) having a body (3) of glass material and a faceplate (5) of solid phosphor material. The body (3) and faceplate (5) are sealed together by a sealant (15) of malleable halide material--for example silver chloride, or lead-silver chloride eutectic. Sealing is effected by inserting a ring (15) of sealant material between abutting surfaces of the body (3) and the faceplate (5), heating in vacuum to above the melting point of the sealant, and cooling to allow the sealant to solidify. The faceplate (5) may be of single crystal material--e.g. zinc tungstate or calcium borate, or may be of hot pressed solid material--e.g. zinc yttrium silicate.

Abstract: A color cathode ray tube includes a faceplate having a predetermined pattern of phosphor deposits on a target surface thereof and a rear envelope section. A color selection electrode assembly includes a frame supporting in tension a foil having a pattern of apertures related to the predetermined pattern of phosphor deposits. Means are provided for bonding the color selection electrode assembly between the faceplate and the rear envelope section with the pattern of foil apertures in registration with said pattern of phosphor deposits such that the color selection electrode assembly is incorporated as an integral part of the cathode ray tube envelope. The foil is sized and the frame adapted such that the foil is supported completely within the tube enclosure on a peripheral frame surface facing away from the said faceplate.

Abstract: A tension mask color cathode ray tube comprises an envelope funnel having a central axis and including a bell portion, one extremity of which has a sealing land. A flat or cylindrical face panel has a target adapted to receive a pattern of luminescent primary color elemental phosphor areas, with a sealing land circumscribing the target. A color selection electrode structure sealed between the sealing lands of the funnel and panel constitutes an integral part of the tube envelope. The electrode structure has a central opening dimensioned to enclose the panel target, and includes a frame supporting a tensed foil color selection electrode. The frame has a support surface fixedly receiving and maintaining the electrode in tension. The frame further has an axial dimension which establishes the color selection electrode at a predetermined Q-distance from the target on the face panel.

Abstract: An improved cathode-ray tube includes an envelope comprising a faceplate panel, a funnel and a neck. The faceplate panel includes a transparent rectangular faceplate having a cathodoluminescent screen on an interior surface thereof. The faceplate has a vertical minor axis and a horizontal major axis. The improvement comprises the thickness of the faceplate being less near the ends of at least one of the major or minor axes than at its center, whereby the viewing angle in at least one direction is increased. In a preferred embodiment, the thickness of the faceplate increases from center-to-edge along its minor axis and decreases from center-to-edge along its major axis.

Abstract: A method of manufacturing a glass product, in which a symmetrical glass member same in shape as a good made by combining a plurality of glass products is molded once and then the symmetrical glass member is cut to provide the plurality of glass products.

Abstract: For trapping loose particles remaining in the envelope of an electron image tube after manufacture or subsequently formed therein, the envelope has a trapping space (49 or 50) which is readily accessible to the loose particles but wherefrom the loose particles can escape only with great difficulty, and which is such that particles trapped therein will not substantially adversely affect normal operation of the tube. The entrance of the trapping space suitably is a funnel-like slit (46 or 48) directed towards the interior of the trapping space (49 or 50). The trapping space (49, 50) is preferably in a region of the envelope free of strong fields which occur during normal operation of the tube.

Abstract: A display tube comprising an envelope consisting of a neck, a cone, and a faceplate including a flat or slightly curved, substantially rectangular display window and a skirt which is substantially parallel to the axis of the envelope. The skirt and the display window meet at a sharply-curved transition portion of the faceplate. The display window has on its inside a substantially rectangular display screen. The display window and the skirt near the sharply curved portion and over the whole circumference of the display window have a thickness d which to an approximation satisfies the following relationship:d=C D.sup.0.8 R.sup.0.2whereinC is a constant between 0.015 and 0.025,D is the diagonal of the inner surface of the display window, andR is the radius of the curvature of the inner surface of the display window.The tube is implosion-safe and the faceplate has a narrow dark edge which is equally wide substantially everywhere around the display screen.

Abstract: The present invention provides an improvement in a cathode-ray tube including a rectangular faceplate which has an exterior surface having curvature along both the minor and major axes. The faceplate also includes a cathodoluminescent screen on an interior surface thereof. At least in the center portion of the faceplate, the curvature along the minor axis is greater than the curvature along the major axis. In the improvement, points on the exterior surface near the ends of the minor and major axes, at the edges of the screen, lie in a first plane, and points on the exterior surface near the ends of the diagonals of the rectangular faceplate at the edges of the screen, lie in a second plane. The second plane is parallel to the first plane and is farther from the center portion of the faceplate than is the first plane.

Abstract: A flat type cathode ray tube is disclosed which includes a flat envelope formed of a flat panel and a dish-shaped funnel, a first deflection system composed of a back electrode and a phosphor screen which are both located within the envelope in opposing relation with each other, a neck portion coupled to the envelope, the neck portion extending in the surface direction of the flat envelope having therein an electron gun, and a second deflection system formed of electro-static deflection plates which are so located within the envelope that they oppose each other across the path of the electron beam emitted from the electron gun to the first deflection system with respect to a thickness direction of the flat envelope. In this case, a projecting portion is provided from the peripheral portion of the funnel for molding material.

Abstract: An improved image pickup tube has an insulating envelope with precisely formed inside and outside surfaces. The inside surface of the envelope has a diameter the midpoint of which lies on a longitudinally extending first mechanical axis. An electron gun is aligned with the first mechanical axis. The precisely formed outside surface of the envelope is substantially coaxial with the inside surface. The outside surface has a diameter the midpoint of which lies on a second mechanical axis that is substantially coincident with the first mechanical axis and the optical axis.

Abstract: A color tube comprises a panel having a patterned screen of phosphor deposits. The panel includes a registration affording arrangement defined by a first plurality of cavities each comprising an elongated, substantially radially aligned portion formed at a selected peripheral location upon the screen side of the panel. A frame dimensioned to enclose the screen comprises first and second spaced-apart surfaces and a registration affording arrangement defined by a second like plurality of cavities, each also comprising an elongated, substantially radially aligned portion formed at a selected peripheral location upon the frame's first surface. The pluralities of panel and frame cavities are arranged so that, collectively, the axes of the elongated portions of the panel cavities and of the frame cavities exhibit substantially the same radial geometry. A tensed foil color selection electrode having a pattern of apertures has a peripheral portion bonded to the frame's second surface.

Abstract: A cathode ray tube apparatus including an envelope having a panel portion with a phosphor screen formed on the inner surface thereof, a neck portion provided with an electron gun therein and a funnel portion therebetween; and a transparent panel facing the external surface of the panel portion with a peripherally located spacer therebetween, wherein a liquid coolant is sealed in the space formed between the panel portion and the transparent panel by light absorbing material, and the spacer is treated to reduce reflection.

Abstract: A glass envelope for a cathode-ray tube with a glass panel section which has a faceplate of substantially rectangular shape with long and short sides, the faceplate having inner and outer surfaces. Radii of curvature of the inner and outer surfaces are established so that:(Rso-Rsi)>(Rlo-Rli)andti (Rso-Rsi)>(Rdo-Rdi),where Rsi, Rli, Rdi and Rso, Rlo, Rdo are inner and outer surface radii, respectively, for the lateral axis, the longitudinal axis and the diagonal axis of the faceplate, respectively.

Abstract: A flatter faceplate cathode-ray tube. If maximum effective dimensions perpendicular to a tube axis, which correspond to the distances between the center of the inner surface and a peripheral portion along the lateral axis, between the center of the inner surface and a peripheral portion along the longitudinal axis, and between the center of the inner surface and a corner along the diagonal axis, are represented by Ss, Sl and Sd, respectively. The ratio between these three values is selected to be 3:4:5. The distances between the center of the inner surface and those individual points along the tube axis defined as .DELTA.D, .DELTA.L and .DELTA.S, respectively, are limited as follows to obtain the dimensions of a flatter source CRT:0.06.ltoreq..DELTA.D.ltoreq.0.12,0.05.ltoreq..DELTA.L.ltoreq.0.10,0.04.ltoreq..DELTA.S.ltoreq.0.80.

Abstract: A cathode-ray tube has a glass panel section which has a substantially rectangular faceplate and a skirt extending from the face plate along the tube axis, when Hs, Hl and Hd respectively denote the length of the skirt at the central portion of the short side, that at the central portion of the long side and that at the corner and ts, tl and td respectively represent the thickness of the faceplate in the vicinity of the center portion of the short side, that in the vicinity of the center portion of the long side and that in the vicinity of the corner the length of the skirt and the thickness of the faceplate respectively have relations defined by the following equations or inequalities (1) and (2):Hs.gtoreq.Hd and Hl.gtoreq.Hd (1)tl.gtoreq.ts and td.gtoreq.

Abstract: A cathode ray tube apparatus having a metal body with heat radiation effect which is located at least at a front periphery of a front panel of the cathode ray tube, a transparent panel located at the front of the front panel and facing the front panel with a predetermined distance therebetween, the metal body abutting the front periphery of the front panel and a periphery of the transparent panel to form a space therein; and transparent coolant sealed in the space.

Abstract: Cathode ray tubes with optical windows in the sidewall or funnel portion thereof are provided with transparent conductive films of metal oxide on the inner surface of the funnel in the window area. Such films provide electrical continuity with the internal conductive coating of the tube, while permitting optical viewing. The films are produced by in-situ pyrolysis of films of metal resiantes in organic solvents.

Abstract: An improved means for incorporating an electron gun and stem assembly into the neck of a cathode ray tube wherein the stem is engaged with a metal collar while providing a groove therebetween, a thermally insulating fusible adhesive having an initial melting point lower than that of the stem is introduced into the groove, an end portion of the neck of the cathode ray tube is inserted into the groove, and the entire assembly is bonded together by means of fusion of the thermally insulating adhesive.

Abstract: A color television display tube having attached to the cone surface abutments in the form of studs or wedges against which the system of deflection coils is placed. The abutments consist of a glass-ceramic material which enables them to be manufactured in a simple manner and allows attachment by means of a rigid lasting glued joint between the abutments and the cone.

Abstract: A cathode-ray tube for a projector, wherein a mesh-like or striped heat conduction member is disposed on an outer surface of a faceplate corresponding to an effective area of a phosphor screen, and the heat conduction member is conductively in contact with a heat radiator which is secured on the outer side of the faceplate.

Abstract: A television bulb is set forth which defines various structural relationships within the bulb construction to enable the manufacture of thin, lightweight TV tubes. The bulb is formed from strengthened glass systems such as laminated sheet glass or chemically strengthened glass, and includes a panel and a funnel having mating outwardly-extending peripheral flange portions which are sealed together. In addition to the peripheral flange portion, the panel includes a central viewing section and sloping sidewall portions which are all tangentially connected together.