Abstract: An electron gun for a cathode-ray tube comprises a modular beam-forming region assembly and a main focusing lens which are affixed to at least two insulative support rods. The modular beam-forming region assembly includes a plurality of cathode assemblies, a control grid electrode and a screen grid electrode. The control grid electrode and the screen grid electrode are attached to a first major surface, of a common ceramic member and the cathode assemblies are attached to a second major surface thereof. A transition member is disposed between a metallized pattern on the first major surface of the ceramic member and the screen grid electrode. The transition member includes a substantially flat portion attached to the metallized pattern and two upright portions substantially perpendicular to the flat portion and substantially parallel to each other. The screen grid electrode is disposed between the upright portions and connected thereto by a plurality of step-like support members.

Abstract: Method and apparatus for depositing a layer of oxide-cathode precursor material on a cathode substrate includes passing a slurry of precursor material from a pool of slurry in a closed pressurized vessel through a tubular means to an air spray gun, wherein the tubular means presents a predetermined resistance to the flow of slurry. Compressed gas flowing through the gun produces a fluctuating siphon pressure in the tubular means and produces a spray of slurry which is scanned across the substrate. The flow resistance in the tubular means dampens the fluctuating component of the siphon pressure while the pressure in the vessel overcomes the flow resistance, controls the slurry flow rate, and makes the flow rate less susceptible to variation due to other factors.

Abstract: An intensified charge-coupled image sensor comprises an image intensifier section and a header assembly. The image intensifier section includes an envelope having therein a photoemissive cathode for emitting photoelectrons in a pattern corresponding to the intensity of radiation incident thereon. The header assembly includes a charge-coupled device with a front surface having a plurality of electrodes adjacent thereto and a back surface directed toward the cathode. The charge-coupled device is improved by forming it on a disc-shape semiconductor wafer having a center portion and an annular rim portion, the center portion has a thickness less than that of the annular rim portion. A plurality of contact pads are formed around at least a portion of the rim portion. The contact pads are electrically connected to different ones of the plurality of electrodes.

Abstract: An electron gun comprises, as in prior guns, a plurality of metal gun elements, held in position from a common ceramic member. A novel transition member is brazed to the common ceramic member. The transition member has a contact portion and a removable frame portion. The transition member is a bimetal comprising two layers of metal bonded face-to-face along an interface extending therebetween. A first layer of metal has a melting point higher than that of a second layer of metal.The novel transition member is provided with a V-notched weakened bridge region extending through the first layer of metal and terminating at the interface with the second layer of metal having the lower melting point. The frame portion of the transition member is removed from the contact portion at the V-notched bridge region when the transition member is brazed to the common ceramic member and the second layer of metal melts. The contact portion has a substantially smooth edge following removal of the frame portion.

Abstract: A cathode-ray tube comprising an evacuated envelope including a glass part and an electrically-conductive coating adhered to the glass part. The coating in the form of a patch or stripe consisting essentially of a major weight proportion of metallic silver particles, preferably in the form of flakes, and a minor weight proportion of lithium silicate binder. The electrically-conductive stripe or patch may be used to assure the electrical connection between an electrically-conductive metal body attached to and having a surface contiguous with a surface of the envelope and an electrically-conductive layer supported from that surface. The stripe or patch is applied from an aqueous slurry of silver particles and lithium silicate and is dried to a substantially water-insoluble, abrasion-resistant coating without or with high-temperature baking.

Abstract: An improved color picture tube has an inline electron gun for generating and directing three electron beams, comprising a center beam and two outer beams, along coplanar paths toward a screen of the tube. The three beams pass through a deflection zone adapted to have vertical and horizontal magnetic deflection fields established therein. The improvement comprises the inclusion of means for nonlinearly increasing the effect of the vertical magnetic deflection field on the center beam relative to the outer beams with increasing angles of vertical deflection of the beams.

Abstract: The novel electron gun comprises, as in prior guns, a plurality of cathode assemblies and at least two spaced successive electrodes having aligned apertures therethrough for passage of a plurality of electron beams. The cathode assemblies and the electrodes are individually held in position from a common ceramic member. The ceramic member has a first major surface and an oppositely disposed second major surface with a metallized pattern formed on at least a portion of each major surface. The electrodes are attached to the first major surface, and the cathode assemblies are attached to the second major surface. Unlike prior guns, a first transition member is attached to the metallized pattern on the first major surface. At least one of the electrodes is attached to the first transition member.

Abstract: An intensified charge-coupled image sensor has a longitudinally extending optical axis. The image sensor comprises an image intensifier section and a header assembly. The image intensifier section includes an envelope having a photoemissive cathode therein for emitting photoelectrons in a pattern corresponding to the intensity of radiation incident thereon. The header assembly includes a charge-coupled device for receiving the photoelectrons from the cathode, an insulative header and a header flange attached between the insulative header and the image intensifier section. The header assembly is improved by the inclusion of an annular support flange which is coaxially disposed within the header flange. The support flange has a projection that abuts the insulative header. A charge-coupled device support assembly is eccentrically disposed within and attached to the annular support flange.

Abstract: The novel electron gun comprises, as in prior guns, a plurality of cathode assemblies and at least two spaced successive electrodes having aligned apertures therethrough for passage of a plurality of electron beams. The cathode assemblies and the electrodes are individually held in position from a common ceramic member. The ceramic member has a first major surface and an oppositely disposed second major surface with a metallized pattern formed on at least a portion of each major surface. The electrodes are attached to the first major surface, and the cathode assemblies are attached to the second major surface. A transition member is attached to the metallized pattern on the first major surface. The transition member includes a substantially flat portion attached to the metallized pattern on the first surface and two upright portions substantially perpendicular to the flat portion and substantially parallel to each other.

Abstract: The novel electron gun comprises, as in prior guns, a plurality of cathode assemblies and at least two spaced successive electrodes having aligned apertures therethrough for passage of a plurality of electron beams. The cathode assemblies and the electrodes are individually held in position from a common ceramic member. The ceramic member has a first major surface and an oppositely disposed second major surface with a metallized pattern formed on at least a portion of each major surface. The electrodes are attached to the first major surface, and the cathode assemblies are attached to the second major surface. A transition member is attached to the metallized pattern on the first major surface. The transition member includes a substantially flat first part and a second part electrically isolated from the first part.

Abstract: An air-cooled electron tube comprises an envelope including an anode forming a section thereof. A plurality of discrete radiator fins having a proximal end and a distal end are disposed so that the proximal end of each fin is adjacent to the anode. A radiator band having an interior surface circumscribes the radiator fins so that the interior surface of the band is adjacent to the distal end of the fins. The band includes at least one projection, and preferably two, formed around the interior surface of the band. The projection is raised about 0.38 mm above the interior surface and terminates in a sharp edge which pierces the distal ends of selected ones of the radiator fins so as to contact the distal end of each of the fins, thereby urging the proximal ends of the fins into contact with the anode.

Abstract: A CRT comprising a screen support, a luminescent viewing screen on the support, a light-reflective metal layer on the screen, and a particulate layer of carbon particles and preformed silica particles on the metal layer. The particulate layer may be made by spraying a suspension of carbon (amorphous carbon and/or graphite) and silica (less than 0.1-micron size) on the metal layer while it is preheated in the 50.degree. to 75.degree. C. range.

Abstract: An improved image pickup tube has an insulating envelope with precisely formed inside and outside surfaces. The inside surface of the envelope has a diameter the midpoint of which lies on a longitudinally extending first mechanical axis. An electron gun is aligned with the first mechanical axis. The precisely formed outside surface of the envelope is substantially coaxial with the inside surface. The outside surface has a diameter the midpoint of which lies on a second mechanical axis that is substantially coincident with the first mechanical axis and the optical axis.

Abstract: A cathode-ray tube includes a display screen having an array of phosphor stripes of three different emission colors arranged in cyclic order in adjacent triads. The tube further includes an electron gun for producing three convergent inline electron beams directed toward the display screen. A color selection structure is positioned between the display screen and the electron gun. The color selection structure includes a metal masking plate having therein an array of apertures arranged in columns that are substantially parallel to the phosphor stripes. The color selection structure further includes beam-influencing strips of insulation disposed on the masking plate which, in combination with the masking plate, define an array of windows for transmitting therethrough portions of the electron beams. A high voltage contact is provided for applying a potential to the metal masking plate and to the display screen. The strips of insulation are parallel to the phosphor stripes of the display screen.

Abstract: An improved color picture tube according to the invention includes an evacuated envelope enclosing a substantially rectangular cathodoluminescent screen, a color selection electrode suspended in register with the screen by a support structure, and an electron gun. The support structure includes a plurality of studs attached to the envelope adjacent to the corners of the screen and a plurality of springs connecting the color selection electrode to the studs. Each spring is a bimetal member of laminated construction having two layers of dissimilar metal joined along facing surfaces. Each of the springs has a proximal end attached at an angle to the color selection electrode and a distal end with an aperture therethrough which pivotably engages one of the studs. Each of the springs includes a step-like portion formed therein.

Abstract: A faceplate assembly includes a faceplate flange, a faceplate member and a sealing material, such as a glass frit, for sealing the faceplate member to the faceplate flange. Three gauging members, integral with the flange, are in contact with the faceplate member to ensure that the faceplate member is sealed parallel to the faceplate flange and at a predetermined distance therefrom.

Abstract: The asymmetric beam focusing slot provides a two-part crossover of the electron beams. The slot has a length greater than the spacing between the outer apertures and a width greater than the diameter of the apertures. The screen grid also has an improved refraction lens which comprises a transversely disposed recessed portion including a substantially rectangularly-shaped central portion and substantially triangularly-shaped end parts. The refraction lens provides a compensating field between the screen grid and the main electron lens to offset any changes in the main electron lens caused by variations in the focus voltage in the main electron lens. The recessed portion has a length, extending in the plane of the electron beams, at least coextensive with the length of the slot, and a width, extending substantially orthogonal to the plane of the electron beams, substantially greater than the width of the slot.

Abstract: A multibeam electron gun comprises two spaced successive electrodes individually held in position from a common electrically-insulating support. Each of the electrodes has at least three beam-defining apertures therein. Each of the electrodes also has two dissimilarly shaped alignment apertures therein which are mutually aligned so that the beam defining apertures are accurately aligned along common axes in a statically determined manner.

Abstract: A multibeam electron gun comprises two spaced successive electrodes individually held in position from a common electrically-insulating support. One electrode comprises a single metal plate having at least three electron-beam defining first apertures therein. The other electrode is a composite structure comprising a support plate and a second metal plate having at least three electron-beam-defining second apertures therein. Each of the first and second plates includes substantially triangularly-shaped alignment apertures which are mutually aligned so that the beam-defining apertures are aligned along common axes.

Abstract: The present invention is an improvement in an electron gun for use in a cathode ray tube. Such gun includes at least one cathode and a plurality of electrodes spaced from the cathode. At least two of the electrodes form a main focusing lens and the electrode nearest the cathode which forms the main focusing lens includes extrusions about an aperture therein. The improvement comprises means located at the end of the gun opposite the cathode for blocking the exit from the gun of electrons emitted from the extrusions.