Abstract: The invention relates to an implosion protection band 26, 126 for a CRT having a plurality of brackets 40, 70, 140 that are disposed between the band and a sidewall 3 of the CRT 1 and detachably attached to the implosion protection band to support either a degaussing coil 9 or to facilitate mounting the CRT within a receiver.

Abstract: A cathode-ray tube comprises an evacuated envelope having a faceplate panel with a sidewall joined to a funnel. A shrinkfit implosion protection band surrounds at least a portion of the sidewall and is in contact therewith. A plurality of openings are formed in the implosion protection band to support a degaussing coil. The implosion protection band is improved over prior bands by providing a cavity in the band around at least three sides of each of the openings. The cavity is directed toward the sidewall of the panel so that the openings in the band are spaced therefrom.

Abstract: A cathode-ray tube comprises an evacuated envelope with a substantially rectangular faceplate panel and implosion protection structure disposed around the periphery of the panel to apply a compressive force thereto. The implosion protection structure includes a tube-contacting portion and an overlapping portion extending at least partially along the tube-contacting portion to provide a double thickness of material to increase the effective cross-sectional area of the implosion protection structure. The implosion protection structure is improved by at least one opening formed through one of the portions thereof. Mounting lugs overlie the opening in the one portion of the implosion protection structure and are secured to the other portion of the structure bounded within the opening. A method of securing the mounting lugs also is disclosed.

Abstract: A cathode-ray tube comprises an evacuated envelope having a faceplate panel with a mold-match line. A luminescent screen is disposed on an inner surface of the panel. The envelope further includes a funnel and a neck portion. The funnel is joined to the panel. An electron gun, for generating and directing at least one electron beam toward the screen, is located in the neck portion. A shrinkfit implosion protection band is fitted on the periphery of the panel to apply a compressive force thereto as a result of the tension of the band. The band includes a double thickness of material, a section of which extends forward of the mold-match line. The band is improved over prior bands by adjusting the effective sectional area of the double thickness portion to a value appropriate to provide deformation compensation to the faceplate panel, thereby maintaining register of the electron beam on the screen.

Abstract: A cathode-ray tube comprises an evacuated envelope which includes a faceplate panel joined to a funnel. A shrinkfit implosion protection band of at least one strip of metal, having oppositely disposed ends, is secured together at a connective joint to form a loop with cold dimensions slightly smaller than the periphery of the panel prior to application of the band. The band has a given sectional area with at least one opening formed therethrough. The band is fitted around the periphery of the panel to apply a compressive force thereto, as a result of the tension of the band. The band is improved by providing at least one slot within the band and in communication with the opening, to reduce the sectional area of the band sufficiently to lower the tension of the band below the minimum design limit of the connective joint.

Abstract: A color CRT assembly comprises a tube having an external magnetic deflection yoke thereon. The tube includes an evacuated envelope with a substantially rectangular faceplate panel and a tubular neck connected by a funnel having a rectangular open end sealed to the faceplate panel. A three color phosphor screen is carried on an inner surface of the faceplate panel and a color selection electrode is mounted in spaced relation therefrom. An electronic gun is disposed within the neck of the tube for generating and directing at least one electron beam to the screen. The magnetic deflection yoke is located on the tube, in the region of the funnel-to-neck junction of the envelope, for subjecting the beam to magnetic fields which cause the beam to scan a rectangular raster over the screen. The assembly is improved by the inclusion, in the funnel, of a quantity of glass which attenuates x-radiation from the tube. The quantity of glass is disposed adjacent to the yoke, on the faceplate side thereof.

Abstract: A method of forming an implosion protection band for a substantially rectangular CRT is disclosed. The band has at least one mounting lug comprising a base portion and an attachment portion cooperating therewith. The method includes the steps of expanding the dimensions of the band to form at least one outwardly directed concavity therein to accommodate the base portion of the mounting lug to prevent the lateral displacement thereof, attaching the mounting lug to the band and affixing the band to the CRT to compressively force the band and the base portion of the lug against the CRT.

Abstract: An implosion-resistant cathode-ray tube has an evacuated envelope with a faceplate which includes a substantially rectangularly-shaped viewing portion that extends to a peripheral sidewall. The sidewall has corners with a given radius of curvature which extends into flattened portions. An implosion protection band extends around the sidewall. A plurality of mounting lugs each having a base portion and an upstanding attachment portion cooperate with the implosion protection band. The base portion of each of the mounting lugs is disposed between the band and the sidewall. The present implosion protection band is improved over prior bands by forming a plurality of concavities in the band to accommodate the base portions of the mounting lugs. The concavities prevent lateral displacement of the mounting lugs and also maximize the contact between the implosion protection means and the sidewall of the faceplate panel.

Abstract: An implosion-resistant cathode-ray tube has an evacuated envelope with a faceplate which includes a substantially rectangularly-shaped viewing portion that extends to a peripheral sidewall. The sidewall has corners with a given radius of curvature which extends into flattened portions. An implosion protection band extends around the sidewall. At least one mounting lug having a base portion and an upstanding attachment portion cooperates with the implosion protection band. The base portion of each of the mounting lugs includes a shoulder projection which substantially conforms to the given radius of curvature of the corners of the sidewall. The attachment portion of the mounting lug is located along a section of the flattened portion of the sidewall of the faceplate panel.

Abstract: A shrink fit implosion protection band for a CRT having rounded corners is stretched along the diagonals by 1.0% to 1.5% to form necked down areas in the band.

Abstract: A cathode ray tube implosion resistant rimband bonding system having soft, flexible, compliant adhesive surfaces which dampens the propagation of cracks through the rimband portion of the tube.

Abstract: The invention relates to a three-portion CRT mounting bracket of the type employed for supporting a banded tube in a display environment. An apertured mounting appendage is located spatially above a seating portion by means of an intermediate protruding portion. By this integral arrangement, the mounting appendage is oriented rearward of the front edge of the banding strap. This permits the strap to advantageously overlay the mold line of the panel, while the appendage is suitably positioned in a plane thereabove to fulfill the respective tube mounting requirements.

Abstract: The invention relates to an improved multiple-bracket system for supporting a banded implosion resistant CRT in an operating position. Discretely formed slots in the rimband components of the combination enable the compatibly formed mounting brackets to be laterally shifted to exact positionings prior to affixal tightening of the tension banding thereover.

Abstract: An implosion-resistant cathode ray tube has an evacuated envelope with a face panel having a substantially rectangular-shaped viewing portion extending to an upturned flanged portion with corners having a given radius of curvature and a metal band encircling and exerting a compressive force on the upturned flanged portion and an "L"-shaped bracket member with a base portion connected to an upstanding attachment portion has the base portion positioned intermediate the metal band and the corner of the envelope and is of a width to provide contact of the encircling metal band with the envelope corner on the given radius of curvature.

Abstract: Apparatus and a process for welding plated ear member to plated rimbands for implosion-resistant cathode ray tube structures is provided. The apparatus includes oppositely disposed electrodes with a central groove in one electrode while the process provides the steps of positioning the ear members and rimbands intermediate the electrodes and energizing the electrodes of a particular configuration in an amount and for a time sufficient to effect welding of the ear members and rimbands.

Abstract: An implosion-resistant cathode ray tube includes an envelope having a substantially rectangular-shaped viewing portion with corners having a given radius of curvature blending into a flattened portion, a pair of rimbands affixed to the viewing portion, a bracket member having a rounded base portion affixed to the rimband and of a width to permit a metal band member to encircle and compress the base portion and contact the rimband on the radius of curvature of the corner and prior to the flattened portion of the envelope.

Abstract: A cathode ray tube envelope resistant to implosion includes a funnel member having a flared portion sealed to a skirt portion joined to a viewing portion of a face plate member having a mould line rearward of the skirt and viewing portion jointure. A pair of "U" shaped flat rimbands having a re-enforcing ridge encircle the skirt portion with a forward edge intermediate the mould line and jointure of the skirt and window portions. A tension strap is applied intermediate the forward edge and re-enforcing ridge of the rimbands.The implosion-resistant envelope is fabricated by sealing the flared portion of the funnel member to the skirt portion of the face plate member encircling the skirt portion with the "U" shaped rimbands with the forward edge of the rimbands intermediate the jointure of the window and skirt portions and the mould line and compressing the rimbands with a strap member disposed intermediate the forward edge and re-enforcing ridge of the rimbands.

Abstract: An integral lens cathode ray tube system includes a cathode ray tube having an electron gun for providing a visual display on a substantially spherical-shaped viewing portion and a glass panel affixed to the viewing portion by a resin disposed therebetween and optically matched to the glass panel and viewing portion of the cathode ray tube.

Abstract: Apparatus for fabricating an implosion-resistant cathode ray tube envelope includes a support member for upholding the envelope and a tightening member movably affixed to the support member and having fixed and rotatable members formed to receive an over-lapping loop of metal strapping therebetween and responsive to activation of the rotatable member to exert a force on and effect movement of one portion of the metal strap in a given direction and exert force on and effect movement of the other portion of the metal strap and the tightening apparatus in a diametrically opposite direction. The metal strapping is positionally located on the envelope by a strap-locating guide.

Abstract: A connective improvement disposed on the exterior of a cathode ray tube includes the metallic fracture-protective member peripherally surrounding the panel as an integral part of the circuitry connecting the exterior coating on the funnel portion of the tube envelope with appropriate grounding circuitry in the chassis. A discrete deposition of connective conductive material is applied to the exterior of the funnel and panel areas, whereof the funnel disposed section has the exterior funnel coating overlaid thereon. The opposed panel-disposed section makes positive connection with the peripheral protective member, which in turn, has a connective element associated therewith to complete the grounding circuitry without disturbing the intervening conductive material or the funnel coating associated therewith.