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: A cathode-ray tube having a conductive internal coating comprised of carbon, optionally iron oxide, lithium silicate and at least one of sodium and potassium silicates on the interior walls of the tube.

Abstract: Novel liquid crystal dyes of the formula ##STR1## wherein (CHOL) is a cholesteryl radical, X can be 0 or NH, R.sub.1 can be H, -OH, methyl, fluoro or chloro; R.sub.2 can be --NO.sub.2, --CN, N--(alkyl).sub.2, --OCOOR, --OCOR, alkyl or alkoxy and R.sub.3 can be H, methyl, fluoro or chloro, can be added to known liquid crystal compositions to impart color to the mixtures and improved contrast to a liquid crystal electro-optic device containing such mixtures.

Abstract: During mount sealing, prior to sliding the mount assembly into the glass neck of a cathode-ray tube, the inner surface of the neck is coated with a film of volatilizable, organic material. Then, the mount assembly is slid into position and sealed in the neck. After sealing, the film is volatilized. Preferably, the film is thin, and the material is volatilizable when heated in air at temperatures below about 400.degree. C, so that it is easily removable by baking in the usual tube-making processes.

Abstract: An evacuated envelope has a rectangular addressing section and a gun section at one edge of the addressing section. The addressing section includes front and back walls in closely spaced, parallel relation, and a plurality of spaced, parallel support walls between the front and back walls forming a plurality of parallel channels. The gun section extends across one end of the channels and includes gun structure which will selectively direct electrons along each of the channels. In each of the channels are guide means to confine the electrons in a beam which is spaced from the walls of the channel and guide the beam along the length of the channel. Deflection means are provided which permit selective deflection of the electron beams toward a target, e.g. a phosphor screen, which is disposed along the inner surface of the front wall.

Abstract: An evacuated envelope has a rectangular display section and a gun section at one edge of the display section. The display section includes front and back walls which are generally rectangular, in closely spaced, parallel relation, and a plurality of spaced, parallel support walls between the front and back walls forming a plurality of parallel channels. The gun section extends across one end of the channels and includes therein gun structure which will direct electrons into the channels. In each of the channels is a beam guide which confines the electrons in a beam and guides the beam along the length of the channel. The beam guide also includes means for selectively deflecting the electron beam out of the guide at selective points along the guide so that beam will impinge upon a phosphor screen along the inner surface of the front wall.

Abstract: The device comprises an electroluminescent layer and means for exciting the electroluminescent layer to luminescence with an electric field. The electroluminescent layer comprises a cathodoluminescent phosphor normally having a bulk resistivity greater than 10.sup.11 ohm-centimeters containing a sufficient quantity of indium oxide and/or tin oxide therein to produce a bulk resistivity of less than 10.sup.10 ohm-centimeters in the electroluminescent layer. The preferred electroluminescent layers are red emitting solid solutions of yttrium oxide, europium oxide, and indium oxide which are prepared by radio frequency sputtering.

Abstract: An aluminized luminescent viewing-screen structure for a cathode-ray tube includes a carbon particle layer in contact with the aluminum layer. The carbon-particle layer is substantially free from metal-ion-containing materials, particularly compounds of alkali and alkaline earth metals.A viewing-screen structure comprising a light-reflective aluminum metal layer having a carbon-particle layer thereon may be made by: (a) depositing on the metal layer a coating of organic, volatilizable, film-forming material, (b) depositing on the coated metal layer an over-coating of carbon particles that is substantially free from substances which, when incinerated, produce metal-ion-containing residues and (c) then baking the screen and support in air at about 400.degree. to 450.degree. C to remove organic and volatile matter.

Abstract: Phosphors consisting essentially of a host material having a face-centered cubic crystal structure and the empirical formula YTa.sub.3 O.sub.9 or Y.sub.3 TaO.sub.7 wherein 0.01 to 0.10 mol percent of the Y is replaced with at least one trivalent activator cation. A portion of the Y up to 20 mol percent may also be replaced with at least one trivalent nonactivator cation, such as Gd, La and Lu. The phosphors may be excited with ultraviolet light, x-rays or cathode rays to emit in the visible and ultraviolet regions of the spectrum depending on the excitation and the activator cations present.

Abstract: An exposure lighthouse for use in printing screen structures for cathode-ray tubes comprising a lens assembly including a diffracting optical element, a main intensity-correction filter and a supplemental intensity-correction filter in series with the main filter. Both of the filters comprise preformed carbon particles in a light - transmitting binder.

Abstract: Method comprises dispersing phosphor particles in a liquid medium and then precipitating filter material on the phosphor particles. The filter-covered phosphor particles are removed from the medium, dried and then heated until the filter material sinters to the surfaces of the phosphor particles as discrete filter particles.

Abstract: A substrate of single crystalline gallium arsenide has on a surface thereof a layer of single crystalline indium gallium phosphide. A layer of single crystalline gallium arsenide is on the indium gallium phosphide layer and a work function reducing material is on the gallium arsenide layer. The substrate has an opening therethrough exposing a portion of the indium gallium phosphide layer.

Abstract: A gas laser tube has a spherical reflector at one end and a flat mirror at the other end. An acoustooptic modulator is attached to the flat mirror. The modulator is positioned so that the generated acoustic wave intersects the laser beam at the Bragg angle.

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: Liquid crystal compounds of the formula ##STR1## wherein X can be alkoxy (RO-), acyloxy ##STR2## or alkylcarbonate ##STR3## wherein R is an alkyl group from 1-10 carbon atoms, have positive dielectric anisotropy and are useful in electro-optic devices which comprise a thin liquid crystal layer between two closely spaced parallel electrodes.

Abstract: A holographic recording medium comprising a conductive substrate, a photoconductive layer and an electrically alterable layer of a linear, low molecular weight hydrocarbon polymer has improved fatigue resistance. An acrylic barrier layer can be interposed between the photoconductive and electrically alterable layers.

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: Recording medium comprising a film of a polymer of 1-methylvinyl methyl ketone on a support is suitable for recording information with electron beams. This recording medium has high resolution and good sensitivity.

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.