Abstract: The electron gun comprises an electron lens assembly including a pair of terminal electrodes fixedly mounted along a pair of glass support rods. Disposed between the terminal electrodes is a resistive lens stack of alternate apertured electrode plates and resistive spacer blocks. The electrode plates and resistive spacer blocks are urged into good electrical contact with each other and with the terminal electrodes by a plurality of leaf springs. The electrode plates are preferably lightly contacted by the glass support rods to prevent lateral movement of the plates without preventing their spring-urged contact with the resistive blocks.

Abstract: The invention relates to improved combination means for effecting an electrical connection in a cathode ray tube between an internal magnetic shield and a conductive coating disposed on the interior surface of the funnel portion of the tube envelope. The longitudinal connector employs a configurated clip-type attachment element which securely mates with a fluting formed on the shield to provide a rapidly achieved secure attachment.

Abstract: An electron discharge device including an evacuated envelope having therein an indirectly heated cathode comprised of a metallic cathode cup having a cylindrical wall provided with an outwardly extended pair of opposing axially sloped flanges which contactingly engage respective opposing bevelled surfaces of a dielectric support ring encircling the wall and having an inner periphery radially spaced therefrom.

Abstract: A pickup tube such as a vidicon has an improved structure for precisely aligning a mesh support electrode relative to a focus electrode. The structure comprises a plurality of focus electrode embossments extending radially outward from the focus electrode and a plurality of mesh support electrode embossments extending radially inward from the mesh support electrode. An insulating ring is molded in situ between the focus electrode embossments and the mesh support electrode embossments. The focus electrode embossments and the mesh support electrode embossments are embedded into the insulating ring.

Abstract: This disclosure depicts for use in a television picture tube having a bulb with a neck at the rear end thereof, a novel electron gun located in closely confined relationship in the neck. The gun has at least one cathode having an electron emissive coating, an apertured, substantially diamond-shaped shield cup with truncated corners and a plurality of electrodes interspaced between the cathode and the shield cup. The tube is characterized by the shield cup having one or more inward formations at one or more spaced locations around its periphery. The inward formations of the shield cup function to define one or more openings between the shield cup and the inner wall of the neck which act as cathode-erosion-suppressing by-pass vents during tube evacuation, and/or provide augmented deflection space for contact springs attached to selected opposite ones of said corners.

Abstract: A shielded cathode support structure for electron gun assemblies of a cathode ray tube includes a cup-shaped control grid electrode, a cathode having emissive coating on a closed end, an eyelet member having one end affixed to and supporting the cathode and the opposite end flared and disposed within the control grid electrode to combine to provide a shield for cathode sublimation, and a support member having an upstanding flared portion surrounding an aperture for receiving the eyelet member and for contacting the flared end of the eyelet member with the support member affixed to an insulator rod of the electron gun assembly.

Abstract: In an electron beam generating system including a cathode, a Wehnelt electrode, an anode, three groups of at least two electrically conductive rods, the rods of each group being connected to a respective one of the cathode, the Wehnelt electrode and the anode, a plurality of electrically insulating members each holding a respective rod, and a metal disc to which the insulating members are fastened in a manner to insulate each rod from the disc and from the other rods, the disc is made in the form of a circular ring provided with a central opening and at least six additional openings disposed around the central opening, the insulating members are tubular members each having a central bore and each projecting from both sides of the disc, and each rod is inserted in the bore of a respective insulating member, and extends at least partially through, and is fastened to, its respective insulating member.

Abstract: The invention relates to an electron gun for a color television picture tube which has a rapid heating characteristic to produce electron emission in a short time. The indirectly heated electron emission portion of the cathode is supported from thin contoured support straps which provide a low thermal conductivity to the electron gun body.

Abstract: In order to reduce to a minimum the internal diameter of the focusing coils 30 of travelling-wave tubes, the electrodes of the electron gun 10 thereof terminate in cylindrical portions 26, 31 whose external surfaces are in contact, via rings 27 and 28, with metal washers 18, 19 separating insulating cylinders 14, 15, 16 stacked one on top of the other and forming a socket for the casing of the tube containing gun 10. The contact is such that the radial dimensions are minimal and high insulation can be provided between the components. Application to high-power, high-voltage travelling-wave tubes.

Abstract: An electron beam generator with a linear cathode which has at least one end clamped to enable the cathode to move longitudinally. A beam forming electrode is at the same potential as the cathode and has an exit opening for the electron beam. The beam-forming electrode is provided with connection means to supply beam and heater voltage to the cathode. The clamps used to clamp the cathode, are connection contacts for the ends of the cathode and are outside of the contact points in the emission area of the cathode.

Abstract: An electron gun assembly for generating a plurality of converging electron beams wherein at least one control electrode is supported eccentrically relative to the tube axis by a supporting member having a coefficient of linear expansion lower than 80.10.sup.-.sup.7 /.degree.C.

Abstract: A fast warm up cathode comprises a substantially cup-shaped top cap and a hollow cylindrical sleeve axially displaced from the top cap. Means are provided for joining the sleeve and the top cap into an integral unit. The means comprise a plurality of individual rod-like members having extremities substantially flat for attachment to the top cap and the sleeve. The plurality of rod-like members are equally spaced about the periphery of the sleeve and the top cap.

Abstract: A picture tube containing an electron gun assembly and an attached antenna type getter is provided which a spring like support member to maintain axial alignment of the electron gun assembly in the picture tube.

Abstract: An improvement is provided in a color cathode ray tube mask-panel assembly to assure positive electrical contact between the apertured mask member and the sidewall portion of the viewing panel. Resilient electrical contactor means positioned in the spacing between the mask member and the panel, is maintained in a flexed attitude with the attachment portion thereof affixed to the frame and an integral flexural contact portion so oriented to effect constant pressured contact with the conductively coated sidewall of the panel.