Abstract: This disclosure depicts a novel method for dispensing a cement onto the seal land of a color CRT funnel. In particular, this method is intended for dispensing cement onto a funnel seal land which defines a convex curved plane, at least a curved segment of the seal land lying on a predetermined radius. The method comprises holding the funnel in a neck-down position, providing a substantially stationary cement dispensing nozzle and, in order to dispense cement on at least the segment of the curved seal land, swinging the funnel about the origin of the radius of the seal land segment such that the seal land segment passes under the cement dispensing nozzle at a substantially constant predetermined distance beneath the nozzle and in a substantially horizontal attitude. Apparatus is disclosed for implementing the described method.

Abstract: This disclosure depicts a method of spot-knocking an electron gun having a heater and cathode, a control grid G1, a screen grid G2, and four main focus lens electrodes (G3, G4, G5, and G6), wherein a first relatively large gap exists between G2 and G3, between G3 and G4, between G4 and G5, and between G5 and G6, and a second relatively small gap exists between G1 and G2, and a third relatively very small gap exists between G1 and the cathode.

Abstract: This disclosure depicts a novel funnelbond system for implosion protecting a color television picture tube having a flangeless faceplate and a mating funnel. The funnelbond system is illustrated as comprising, in its most general sense, a high tensile strength frame which surrounds and hugs a portion of the funnel adjacent the faceplate. A cement bonds the frame to the funnel portion. The system binds up the funnel portion to provide implosion protection.

Abstract: This disclosure depicts a process for forming on an inner viewing surface of a color cathode ray tube having a flangeless faceplate a coating of an aqueous slurry composed of a photosensitized organic binder and a suspension of phosphor particles. The process comprises applying an aqueous pre-wet to the inner surface of the faceplate and, while the surface is still wet, applying a phosphor slurry to the pre-wetted inner surface of the faceplate; and suffusing the slurry across the surface to form a coating thereof. As a result of the pre-wetting of the faceplate surface, the occurrence of radially oriented non-coated areas on the surface is eliminated and the phosphor sedimentation rate is enhanced.

Abstract: This disclosure depicts a means for energizing a color television cathode ray tube during manufacture. In particular, this means for energizing a color television picture tube is for use with a tube having an envelope containing an electron gun assembly and a base attached to a neck of the envelope. The base has electrically conductive pins connected to elements of the electron gun assembly wherein a first of the pins on the base carries a relatively high focus potential of many kilovolts and a second of the pins carries a substantially higher main focus lens potential. The means for energizing the tube during the manufacture comprises a socket for coupling with the base on the tube wherein the socket has a lead attached to a source of high potential, the lead being characterized by having a switch. The switch has an electrically nonconductive casing filled with a dielectric fluid.

Abstract: A system for enlarging the image on the screen of a cathode ray picture tube by increasing the deflection of the electron beam. Accompanying deterioration in contrast and brightness is reduced by blanking the overscan portions of the raster. In addition, contrast and color level controls are automatically adjusted to match the expanded image to the normal image. The blanking for both the horizontal and vertical deflection is handled by a common circuit.

Abstract: This disclosure depicts a novel system for implosion protecting a color television picture tube having a faceplate with a rearwardly extending side surface and a mating funnel. The system is illustrated as comprising, in part, a high tensile strength frame which surrounds and overlies at least a portion of the side surface of the faceplate and which is cemented to the faceplate. The system further comprises a crack retarder which is located about the circumference of the tube, but which is spaced axially rearwardly from the frame. The system assists in retaining in position the shards of a shattered faceplate and also assists in retarding the propagation of cracks in the tube, thereby providing for a relatively gradual buildup of pressure in the tube.

Abstract: This disclosure depicts a method, for use in the manufacture of color television picture tubes, for attaching a frameless, curved, non-self-rigid shadow or photographic mask to a flangeless, curved faceplate, the faceplate having a concave inner surface with mask support studs extending therefrom in corner regions thereof. The method comprises providing on each corner of the mask a leaf-type spring having a stud engagement provision for retentively engaging a mating provision on one of the studs. The leaf-type spring also has indexing means separate from the stud engagement provision. The mask is supported in a substantially horizontal position, with the faceplate also being supported in a substantially horizontal position such that the concave surface of the faceplate faces a convex surface of the mask.

Abstract: This disclosure depicts a novel edgebond system for implosion protecting a color television picture tube having a flangeless faceplate. The edgebond system is illustrated as comprising in its most general sense a high tensile strength metal contoured frame, preferably having a substantially constant depth around the faceplate, which is cemented to and binds up the edge surface of the faceplate, i.e., the thickness dimension of the faceplate. The system assists in retaining in position the shards of a shattered faceplate and thereby provides for a relatively gradual buildup of pressure in the tube.

Abstract: This disclosure depicts a novel facebond system for implosion protecting a rectangular, shadow mask type color television picture tube having a flangeless faceplate with a central viewing area and a relatively wide peripheral non-viewing area. The facebond system is illustrated as comprising, in its most general sense, a metal high tensile strength frame having a curvature similar to the curvature of the faceplate and having substantially the same rectangular shape and size of the faceplate. The frame has a substantially rectangular central window slightly larger than the viewing area of the faceplate and is bonded to the non-viewing area of the faceplate so as to environ the viewing area thereof. The system assists in retaining in position the shards of a shattered faceplate and thereby provides for a relatively gradual buildup of pressure in the tube.

Abstract: This disclosure depicts a method for use in the manufacture of a rectangular shadow mask-type color television picture tube including a flangeless, curved faceplate having a central axis, a convex front surface, and a concave rear surface with a phosphor screen deposited on a central portion thereof. The faceplate also has four shadow mask suspension studs extending from the rear surface of the faceplate, one in each peripheral corner region of the faceplate, and a shadow mask suspended from the studs. The tube also includes a funnel having a central axis and a neck attached to a rectangularly cross-sectioned flared portion, the flared portion having a seal land which mates with the concave rear surface of the faceplate. The seal land has deposited thereon a cement for sealing the faceplate to the funnel.

Abstract: This disclosure depicts a novel yoke adjusting apparatus for tilting a yoke relative to a central axis of a color television picture tube having a funnel with a flared portion and a neck containing an inline electron gun assembly. The yoke adjusting apparatus is illustrated as comprising; a circumferential support about the neck of the funnel and attached to the flared portion, a tilt adjusting means carried by the circumferential support for selectably positioning the yoke, a locking means for locking the tilt adjusting means in any selected position, and a manually operable means for releasing the locking means to free the tilt adjusting means and thereby enable it to be retracted and the yoke readjusted. The apparatus provides for simplicity and economy in readjusting the yoke at a later point in time after the initial adjustment.

Abstract: This disclosure depicts a novel edgebond system for implosion protecting a color television picture tube having a flangeless faceplate and a mating funnel. The edgebond system is illustrated as comprising, in its most general sense a high tensile strength metal scalloped frame which is cemented to and binds up a portion of the funnel and also the edge surface of the faceplate, i.e., the thickness dimension of the faceplate. The system assists in retaining in position the shards of a shattered faceplate and thereby provides for a relatively gradual buildup of pressure in the tube and provides for a maximum overlay of the funnel and a maximum volume of cement at the center of the sides of the funnel to provide greatest implosion protection at portions of the tube where greatest protection is needed.

Abstract: This disclosure depicts, for use in salvaging parts from a color television cathode ray tube of the type having a glass bulb comprising an approximately rectangular, flangeless, curved faceplate and a funnel having a convex seal land, a novel method for separating the funnel and the faceplate. The funnel seal land mates with a concave rear surface of the faceplate to define a contoured sealing interface. The faceplate is sealed to the funnel with a frit material located at the sealing interface.

Abstract: This disclosure depicts a novel method of etching a shadow mask for a color television picture tube and in particular to a method of etching the steel substrate layer of a two layer shadow mask, wherein the first layer has been previously etched, and of reclaiming the used etchant. Ferric sulphate is used to etch the steel substrate layer, resulting in the generation of ferrous sulphate, a by-product of the chemical reaction of the ferric sulphate etchant and the steel substrate. The used etchant is reclaimed by reacting and mixing in a particular manner the used etchant with sulfuric acid and hydrogen peroxide.