Abstract: A front assembly is disclosed for a tension mask color cathode ray tube. The assembly comprises a faceplate having a tensed foil shadow mask supported by mask support means, and means for shielding the faceplate from a high-energy beam used to trim waste material from the mask following its attachment to the mask support means.

Abstract: Improved bonding in a cathode ray tube (CRT) between its glass funnel and glass faceplate is achieved by applying a thin base layer of a priming agent to an aft portion of the faceplate adjacent to the periphery thereof as well as to the forward edge of the funnel prior to positioning of the CRT components in contact. An intermediate layer of sealing glass frit is then deposited upon either of the aforementioned layers of the priming agent and adheres to the two priming agent layers without forming a re-entrant geometry. By "priming" the two abutting glass surfaces over an area which extends beyond the area of high loading with the priming agent prior to joining these surfaces, bond integrity is ensured and high stress concentration in the seal is avoided. The sealing glass frit may be comprised of a conventional glass cement paste and is also used as the priming agent in a preferred embodiment.

Abstract: An improved front assembly for a color cathode ray tube having a tension foil shadow mask is disclosed. The faceplate of the tube has on its inner surface a centrally disposed phosphor screen surrounded by a peripheral sealing area adapted to mate with a funnel. The assembly includes a shadow mask support structure for securing a shadow mask in tension on the structure and for spacing the shadow mask from the screen. The support structure is comprised of an assembly including a plurality of elongated members that substantially surround the centrally disposed phosphor screen and meet at corner areas of the screen. The elongated members having open ends. The support structure also includes corner connector members having reduced end or plug portions projecting into the open ends of adjacent ones of the elongated members at the corner areas of the screen. The plug portions are sized and shaped to provide a snug fit with the open ends of the adjacent elongated members and are secured and sealed thereto.

Abstract: Improved bonding in a cathode ray tube (CRT) between its glass funnel and glass faceplate is achieved by applying a thin base layer of a priming agent to an aft portion of the faceplate adjacent to the periphery thereof as well as to the forward edge of the funnel prior to positioning of the CRT components in contact. An intermediate layer of sealing glass frit is then deposited upon either of the aforementioned layers of the priming agent and adheres to the two priming agent layers without forming a re-entrant geometry. By "priming" the two abutting glass surfaces over an area which extends beyond the area of high loading with the priming agent prior to joining these surfaces, bond integrity is ensured and high stress concentration in the seal is avoided. The sealing glass frit may be comprised of a conventional glass cement paste and is also used as the priming agent in a preferred embodiment.

Abstract: Negative interference fixturing means and process are disclosed for use in the photoexposure of an in-process faceplate assembly for a color cathode ray tube, and the attachment of a shadow mask to its support. The assembly includes a flat glass faceplate having on its inner surface a centrally disposed screening area for receiving a predetermined pattern of phosphor deposits, a shadow mask having a pattern of apertures corresponding to the pattern of phosphor deposits, and a shadow mask support structure located on opposed sides of the screening area for supporting the mask in tension.

Abstract: A front assembly for a color cathode ray tube is disclosed that as having improved means for mounting components for electrical interconnection and magnetic shielding. The assembly comprises a faceplate having on its inner surface a centrally disposed, electrically conductive phosphor screen. A peripheral sealing area is located on the inner surface of the faceplate for receiving a funnel, and the funnel has an internal electrically conductive funnel coating adapted to receive a high electrical potential. A metallic shadow mask support structure is secured to the inner surface of the faceplate between the screen and the peripheral sealing area, and encloses the screen and is in contact with the screen. The structure supports in electrical union therewith a tensed foil shadow mask. The structure has a side adjacent to the sealing area essentially perpendicular to the screen which has secured thereto by weldments an internal magnetic shield.

Abstract: An apparatus and a process is disclosed for use in the manufacture of a color cathode ray tube having a tensed foil shadow mask with a central apertured area and an unapertured border. The apparatus, which provides for thermally expanding an in-process shadow mask, includes a pair of heated platens for embracing a mask. At least one of the platens has a recess therein with width and length dimensions no less than the apertured area such that migrant particles trapped between the platens cannot damage the apertured area.

Abstract: An improved front assembly for a color cathode ray tube having a tension foil shadow mask is disclosed. The faceplate of the tube has on its inner surface a centrally disposed phosphor screen surrounded by a peripheral sealing area adapted to mate with a funnel. A shadow mask support structure is provided for securing a shadow mask in tension on the structure and spacing the shadow mask from the screen. The support structure includes an undulated strip defining a bottom sinuous edge for securing the support structure to the faceplate and a top sinuous edge for securing the shadow mask to the support structure. A cap may be provided for securement to the top sinuous edge of the undulated strip to provide a land for securing the shadow mask to the support structure.

Abstract: An improved light collector, for collecting the light in a plurality of parallel light beams directed across the display surface of a touch panel apparatus and for redirecting it in a direction substantially perpendicular to the light beams for detection by a common detector positioned adjacent one end of the collector, comprises an elongated strip of light transmissive material terminated by a light collection station. A plurality of light reflecting elements is disposed inside and spaced along one side of the strip and each has a transverse dimension small in comparison to cross-section of the strip. The surface of each reflecting element is tilted with respect to the longitudinal axis of the strip. A like plurality of focusing elements is also disposed along the strip and each such element is individually associated with an assigned one of the reflecting elements.

Abstract: An improved front assembly for a color cathode ray tube having a tension foil shadow mask is disclosed. The faceplate of the tube has on its inner surface a centrally disposed phosphor screen surrounded by a peripheral sealing area adapted to mate with a funnel. The assembly includes a shadow mask support structure for securing a shadow mask in tension on the structure and spacing the shadow mask from the screen. The support structure is provided by a support assembly including an inverted channel member to facilitate securing the shadow mask to the support structure. A stiffening core is secured within the channel member. A rigid bar may be secured to the top of the channel member for securing the shadow mask thereto.

Abstract: A front assembly for a color cathode ray tube includes a faceplate having a peripheral sealing area adapted to mate with a funnel, with a centrally disposed phosphor screen. The assembly according to the invention includes a separate shadow mask support structure composed of ceramic material secured to the faceplate inner surface on opposed sides of the screen and within the sealing area for receiving and supporting a foil shadow mask in tension a predetermined distance from the screen. Other configurative aspects include a separate continuous or discontinuous metal cap or strip secured to the support structure for receiving and securing a mask, and a mask support structure comprising four discrete rails composed of ceramic with weldable metal strip means for interconnecting the rails to form a generally rectangular unitary shadow mask support structure.

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 front assembly for a color cathode tube is disclosed. The tube faceplate has on its inner surface a centrally disposed screen area for receiving process materials during the spin-application process. The front assembly has a shadow mask support structure secured to the inner surface of the faceplate on opposed sides of the screen area. The structure has a first surface for receiving and securing a foil shadow mask, and a second surface inclined from the first surface to the screen area effective to conduct from the screen area any excess of coating material applied during the spin-application process. As a result, discontinuities in phosphor application visible to the viewer, and non-adherence of phosphor resulting in wash-off and flake-off, are avoided. An embodiment is also shown in which electrical connection is made between a mask support structure and a screen.

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: 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 color cathode ray tube comprises an envelope including a faceplate portion having on an inner surface a pattern of cathodoluminescent phosphors deposited thereon. The envelope includes a continuous peripheral support surface within the envelope spaced approximately a predetermined distance from the inner surface of the faceplate. The tube has a tensed foil aperture mask cemented to the support surface by cement means. The mask blank has a first field of apertures in coordinate relationship to the pattern of cathodoluminescent phosphors for color selection. A second field of apertures peripheral to the first field, and coordinate with the support surface, provides for receiving cementing means during assembly of the blank into a cathode ray tube. The apertures have the form of a band of substantially uniform width at least along the sides of the blank, and are small in diameter relative to the width of the band.

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 touch panel assembly support system for a CRT includes a lightweight rigid frame surrounding the tube for supporting the touch panel elements in predetermined alignment. The frame is mounted to cut-away portions of the CRT mounting ears to preclude inducing stress in the frame during mounting to the ears and to isolate it from any stress created during mounting of the CRT to a support.

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: Cooling means are disclosed for cooling the face panel of a projection cathode ray tube. The cooling means comprises a housing having a rearwardly extending flange with a forwardly tapering section configured to nest with the forwardly tapering section of the face panel when mated therewith. The housing has a window section for framing and passing the image formed on a cathodoluminescent screen on the inner surface of the face panel. Spacing means are provided for spacing the window section of the housing from the face panel window section, and bonding means provide for bonding and hermetically sealing the tapering sections together. A cooling medium is located in the space between the windows for cooling the face panel.