Abstract: A cathode-ray tube with a platform adhered to the external surface of the tube by at least one mass of solidified thermoplastic adhesive and at least one mass of irreversibly-hardened adhesive. The method includes applying masses of liquid thermoplastic and liquid irreversibly-hardenable masses between the platform and the tube surface, and then solidifying each of the adhesive masses.

Abstract: Self-activated ultraviolet-emitting hafnium pyrophosphate phosphors. Up to about 20 mole percent of the hafnium may be substituted with one or more of zirconium, germanium and silicon. The phosphors, which may be excited by ultraviolet radiation, x-rays and electron beams, may be used as energy converters in photodevices. The phosphors may be prepared by heating a mixture of a hafnium compound, a phosphate (no added activator ions) and optionally compounds of one or more of zirconium, germanium and silicon, which are present in proportions up to about 25 mole percent of the hafnium present, at about 1000.degree. to 1300.degree. C in air.

Abstract: An electron-tube socket comprising a plurality of spring wires in a circular array, each wire including (i) a base portion adapted to be clamped in a fixed position within the socket, (ii) an extended portion terminating in a free end which extends towards the open side of the socket cavity and including a contacting section adapted for contacting a pin of the electron tube and (iii) a transitional portion connecting the base portion with the extended portion and adapted to urge the contacting section against the pin.

Abstract: In a method for devacuating a vacuum tube to atmospheric pressure, a pulsed beam of radiant energy, such as a laser beam, is directed upon an area of the glass neck portion of the tube that is opposite and closely spaced from a surface structure of the mount assembly in the tube, so that volatilized material that is swept into the tube condenses on and sticks to the surface structure.

Abstract: A cathode-ray tube comprises a getter container supported on a metal spring which is attached to and extends from the electron-gun mount assembly. At least a portion of the spring consists of an alloy, such as 55-nitinol (an alloy of nickel and titanium), which can be thermally set to a first shape, then cold formed to a second shape, and then restores itself to the first shape upon being heated above a predetermined transition temperature. The method includes providing a spring which has been thermally set and then cold formed, attaching the container to the spring and the spring to the mount assembly, sealing the container and the mount assembly in the tube, and then heating the spring above the predetermined transition temperature.

Abstract: Method for depositing a luminescent film upon a substrate comprising vaporizing into a nonreactive carrier gas (1) at least one member of a first group consisting of hydrides and alkyls of M.sup.1, wherein M.sup.1 is at least one of silicon, germanium, boron, phosphorus, and aluminum, (2) at least one volatile M.sup.2 -containing organo-metallic compound of a second group, wherein M.sup.2 is at least one of zinc, cadmium, magnesium, calcium, beryllium, strontium, or barium, and (3) at least one volatile M.sup.3 -containing organo-metallic compound of a third group, wherein M.sup.3 is at least one activator for said luminescent film. The vapor-laden carrier gas and the oxidizing gas are contacted with the substrate which is at temperatures in the range of about 300.degree. to 700.degree.C. The reaction is continued unitl the desired thickness of luminescent film is achieved.

Abstract: Device comprises an evacuated envelope and a heater-cathode assembly including an electrically-conductive, porous metal body containing electron-emission material and at least two electrically-resistive legs attached directly to spaced positions on the body. Electric current flowing through the legs and body generates heat in the legs, which heat is thermally conducted to the body. The parts are proportioned to reduce radiation losses by minimizing surface area. The structure reduces bulk and mass to permit short heating-up times.

Abstract: Method comprises coating a supporting surface with a film consisting essentially of a polymeric photobinder containing light-scattering particles of an organic, insoluble, volatilizable material; exposing the film to a light image developing the film; and adhering particles of screen structure material to the film before or after developing the film.

Abstract: A family of luminescent materials or phosphors having a rhombohedral crystal structure and consisting essentially of a mixed host sulfide of at least one monovalent host cation and at least one trivalent host cation, and containing, for each mole of phosphor, 0.0005 to 0.05 mole of at least one activating cation. The monovalent host cations may be Na, K or Rb and Cs. The trivalent host cations may be Gd, La, Lu, Sc and Y. The activating cations may be one or more of trivalent As, Bi, Ce, Dy, Er, Pr, Sb, Sm, Tb and Tm; divalent Eu, Mn, Pb and Sn; and monovalent Ag, Cu, and Tl. The novel phosphors may be used in devices to convert electron-beam, ultraviolet or x-ray energy to light in the visible spectrum. Such energy conversion can be employed for example in fluoroscopic screens, and in viewing screens of cathode-ray tubes and other electron tubes.

Abstract: Manganese-and-magnesium-coactivated strontium sulfide phosphors are both photoluminescent and cathodoluminescent. The incorporation of small amounts (5 to 1000 ppm) of magnesium into manganese-activated strontium sulfide phosphors shifts the CIE emission color coordinates from about x = 0.323 and y = 0.650 for the magnesium-free phoshor to about x = 0.370 and y = 0.611, for the maximum amount of incorporated magnesium.

Abstract: In a direct photographic process for preparing a viewing-screen structure for a shadow-mask-type CRT having temperature-compensated mask-mounting means, an inner surface of the panel is coated with a layer of light-hardenable material and then heated above 50.degree.C to dry the layer. While the panel is above 40.degree.C, the layer is exposed to actinic light through the mask of the tube. The temperature-compensating-mounting means for the mask is cooled, as with streams of air, to adjust the spacing between the mask and the inner surface of the panel and to prevent the mask from being twisted on the mounting means. Also the mask may be cooled to prevent doming of the mask.

Abstract: The inner surface of a faceplate panel of a cathode-ray tube is cleaned and then precoated with water-insoluble, organic, polymeric particles, the precoating having a weight of 0.08 to 0.80 and preferably 0.20 to 0.40 mg/cm.sup.2. A subsequently applied phosphor-photobinder coating is exposed to a light image and then developed with a turbulent quantity of aqueous liquid. The phosphor-photobinder coating exhibits improved adherence during the developing step due to the presence of the precoating.

Abstract: During the low-voltage aging of a completely-assembled and operative cathode-ray tube, a varying positive voltage is applied to the focus electrode and a constant positive voltage is applied to the screen electrode while the cathode is emitting electrons. The effect is to cause electrons from the cathode to scan or spray across the electrode surfaces causing outgassing by electron bombardment of the scanned surfaces. This results in higher and more stable cathode-emission levels.

Abstract: The method comprises sealing into a cathode-ray tube a mass comprising a strontium-aluminum alloy, heating the mass above 1100.degree.C until a substantial proportion of the strontium is liberated and vaporized, and condensing the vaporized strontium as a metal film on internal surfaces of the tube. A material which releases gas during the heating step may be included in the mass.

Abstract: The average aperture width in a small area of an apertured member, such as a shadow mask for a cathode-ray tube, is determined by passing a beam of substantially monochromatic light through an area of the member to form an interference pattern, detecting the intensities of at least two light fringes of the interference pattern, generating electrical signals which are representative of the detected intensities and then deriving the average width of apertures in the lit area of the member from the generated signals.

Abstract: A method for preparing a supplemental intensity-correction filter for an exposure lighthouse that is used to print viewing-screen structures for cathode-ray tubes. The method involves printing a screen structure without a supplemental filter, calculating how incremental areas of the light field must be modified at the surface of an optical element of the lighthouse to produce the desired screen structure, and then printing a supplemental filter on that surface having the transmission characteristics necessary to modify the light field as required.

Abstract: Apertured-mask cathode-ray tube comprises a strontium metal getter film on at least a portion of the electron-beam-receiving surface of the mask. The method comprises sealing into the tube a mass comprising a strontium-aluminum alloy, heating the mass above 1100.degree.C until a substantial proportion of the strontium is liberated and vaporized, and condensing the vaporized strontium as a metal film on internal surfaces of the tube.

Abstract: Self-activated ultraviolet-emitting zirconium pyrophosphate phosphors, wherein 0.01 to 20 mole percent of the zirconium is substituted with one or more of hafnium, germanium and silicon. The phosphors, which may be excited by ultraviolet radiation, x-rays and electron beams, may be used as energy converters in photodevices.

Abstract: A glare-reducing coating, as for a viewing surface of a cathode-ray tube, is prepared by (a) warming the surface of a support to about 30.degree. to 100.degree.C, (b) coating the warm surface with an aqueous solution containing a lithium stabilized silica sol, (c) drying the coating, (d) baking the dry coating at about 150.degree. to 450.degree.C, and then (e) subsequent to said heating step (d), washing the dry coating with hot water. The coating may contain carbon particles or carbon particles and a color-correcting dye.

Abstract: Method comprises applying a portion of initial slurry to a first substrate, spreading the initial slurry on the substrate, removing the excess slurry from the substrate, preparing a reconstituted slurry comprised of the removed excess slurry and a makeup slurry, and then dispensing a portion of reconstituted slurry onto a second substrate. As compared to the initial slurry, the makeup slurry has at least one of (1) a larger proportion of large particles, (2) a larger proportion of phosphor, (3) a greater binder/water ratio and (4) a smaller photosensitizer/binder ratio..Iaddend.