Abstract: The display screen 3 of a cathode ray tube 1 is provided with an electroconductive coating 8 of poly-3,4-ethylene dioxythiophene. The layer 8 has a sheet resistance of 1 k.OMEGA./.quadrature. and a high transmission. The layer 8 provides an effective shield against electromagnetic radiation. The coating can be provided with additional layers of, for example, silicon dioxide to improve the mechanical properties.

Abstract: Display device comprising a display screen provided with phosphors, and coated with a spectrally selective, light-absorbing coating comprising silicon oxide and at least two dyes. The spectral transmissions for blue, green and red phosphor light are chosen to be such that the electron currents towards the blue, green and red phosphors for obtaining white D (6,500K) are substantially equal.

Abstract: A neon lamp assembly includes a housing having a cavity with an aperture for emission of light, a neon lamp mounted within the cavity in the housing for emission of light through the aperture and a lens covering the aperture in the housing. Connectors are secured to opposite ends of the neon lamp. Each connector includes a resilient boot that is positioned in a recess in the housing. The resilient boot locates the lamp in the housing and cushions the lamp against shock and vibration. The neon lamp assembly further includes a light-transmissive, conductive mesh covering the aperture in the housing for substantially blocking the emission of RF energy from the housing, and an electrical conductor for coupling the conductive mesh to a reference potential, such as ground. The neon lamp is typically used as a stop light in a vehicle.

Abstract: This invention relates to a magnetron of a microwave oven is disclosed including a lead for supporting a filament, and a filament terminal for electrically connecting the lead and a choke coil, wherein the filament terminal has a slit and serves to cut off unnecessary high harmonic leaked out to an input of the magnetron.

Abstract: An electrodeless fluorescent lamp comprises a sealed lamp vessel containing a fill capable of sustaining a discharge when suitably excited. The fill is excited by an RF electromagnetic field produced by a winding energized by an RF oscillator powered via a rectifier from the mains. To confine the RF field within the vessel a conductive coating FTO is provided inside the vessel. To at least reduce conducted interference a conductive coating A1 is provided on the outside of the vessel G. The coating A1 is electrically coupled (e.g., via 7) to RF ground which may be one side of the mains. An electrically insulative housing covers the coating A1. The housing which extends to a zone of maximum diameter of the vessel may grip the vessel.

Abstract: Color display tube having a display screen with a pattern of phosphor elements. To reduce mislanding errors of the electron beams, particularly in the y-direction, the color display tube is arranged within an external magnetic shield which is constituted by an open arrangement (frame) of bars of a soft-magnetic material. The bars jointly constitute, for example the ribs of a block.

Abstract: A shielding device for blocking electromagnetic waves emitted from a deflection yoke which has a predetermined magnetic permeability and includes at least one shielding plate coaxially disposed on in the neck of the deflection yoke, to thereby simplify assembly and enhance productivity.

Abstract: A luminaire includes a lamp connected at one electrode to an ordinary current loop and at the other electrode to the other current loop which is branched into more than two which are extending along two opposite sides of the lamp. Magnetic fields produced thus in the branched loops act to cancel each other, and any noise occurring due to generation of the magnetic field can be remarkably reduced.

Abstract: An electric discharge lamp has a discharge vessel including pair of opposing planar seals each having a pair of major faces and a pair of minor, side faces. A containment shield surrounds the discharge vessel and includes a glass sleeve and a helically coiled wire secured on the glass sleeve. The glass sleeve is pinched to bevelled ends of the minor, side faces of the seals only and substantially does not engage the major faces of the seal. The wire is fixed around the sleeve in an electrically floating manner, e.g. by clamping fit. With the sleeve secured to the discharge vessel, MH quality photometrics are obtained with a tubular body arc tube without an end coat. The construction of the lamp is simple and effective to protect the outer bulb from being damaged by an explosion of the discharge vessel, and to prevent sodium from disappearing from the discharge vessel as a result of photoemission.

Abstract: This invention relates to a bead supporter for supporting a cathode assembly of an electron gun for a cathode-ray tube and fixing the assembly to a bead glass. This invention also relates to an apparatus for sorting and transporting the bead supporters in a properly oriented posture to an assembly line. The bead supporter includes a plurality of positioning projections formed on the lower side of its central portion, and cut-out portions formed in its upper edge portion opposite to the projections to permit the center of gravity of the supporter to vary depending upon its normal and reverse positions. The apparatus includes a feeding surface and a horizontal sorting surface for transferring the bead supporters. The width of the horizontal sorting surface is less than the width of the feeding surface such that each supporter having cut-out portions formed therein falls from the sorting surface when reversely positioned.

Abstract: The high voltage electrostatic accelerator of this invention has spark arrester rings which form magnetic shield elements around an acceleration tube and which together with mu-metal rings between accelerator segments shield the electrons being accelerated from stray static and dynamic magnetic fields. The spark arresters surround the accelerating electrodes. The rings between accelerator segments are formed of mu-metal, an alloy of nickel designed for its magnetic shielding properties and consisting of 77 percent nickel, 4.8 percent copper, 1.5 percent chrome and 14.9 percent iron. The mu-metal spark arresters together with the rings between accelerators segments provide an effective magnetic shield in a cost-effective manner. Because mu-metal has a high permeability, magnetic field lines tend to travel about the Mu-metal rings rather than pass through the acceleration tube, where they would influence electrons being accelerated.

Abstract: An electrostatic shield is provided between the induction coil and the arc tube of an electrodeless HID lamp. In one embodiment, the shield is a transparent glass cylinder coated with a thin, transparent, conductive layer of tin oxide. In another embodiment, the electrostatic shield is a conductive, transparent tin oxide coating applied to either the inner or outer surface of an outer light-transmissive jacket surrounding the arc tube. The tin oxide layer is discontinuous so as to minimize currents induced in the conductive tin oxide layer by the induction coil. The thickness of the tin oxide layer is sufficient to make it conductive and form an approximately equipotential surface, thereby shielding the arc tube and plasma discharge from intense electric fields, reducing arc tube wall damage and increasing lamp life. In addition, tin oxide functions as an infrared reflector which returns infrared radiation to the arc tube, resulting in higher efficacy.

Abstract: This invention relates to an unnecessary electromagnetic wave shielding structure of a magnetron for a microwave oven, comprising an electric wave absorbent filament ceramic disposed adjacent the lower end of a power input section to prevent unnecessary electromagnetic waves produced in an active space from being leaked from the input section through a center lead extending downwardly from an upper end shield of the active space and a side lead disposed adjacent the center lead; first and second ferrite cores having different frequency characteristics and inserted concentrically over the filament ceramics at the respective upper and lower sides of the outer periphery thereof to cooperate with the ceramics to shield the unnecessary electromagnetic waves; and an annular insulator placed between the second ferrite core and filament terminals to insulate the ferrite core from the terminals.

Abstract: Hook- and-loop-type tapes are selectively attached to a video display unit and to flexible elongated strips of magnetic material so that the strips of magnetic material may be removably mounted around the video display unit in orthogonally intersecting planes to absorb magnetic radiation from the source. Each strip of magnetic material has a grain orientation parallel to its longitudinal axis and may be formed from grain-oriented ferromagnetic material in the range from M3 to M7. A multiple-layer magnetic shielding material is provided by securing first and second layers of such grain-oriented ferromagnetic material together with the grain orientation of the first layer orthogonal to the grain orientation of the second layer. Each strip of magnetic material may also be formed from this multiple-layer magnetic shielding material.

Abstract: A cathode-ray tube has a tube body with an implosion-resistant band disposed on the side walls of the tube body. Two degaussing coils are mounted on the implosion-resistant band on opposite walls of the tube body. Each of the degaussing coils is of an annular shape including a flat portion and an extension coupled to opposite ends of the flat portion. The flat portion is attached to the implosion-resistant band by an attachment which has a joint arm fixed to the implosion-resistant band and a holder fitted over the joint arm. The flat portion is resiliently gripped between the joint arm and the holder.

Abstract: Internal and external magnetic screens made of magnetic permeable material are added between the discharge chamber and the internal and external sources of magnetic field, respectively. A longitudinal gap is maintained between the screens and their respective internal and external poles, that does not exceed half the distance between the internal and external poles. The exit end part of the internal magnetic screen is placed closer to the middle point of the accelerating channel than the internal pole. The walls of the exit end part of the discharge chamber are constructed with an increased thickness, and extend beyond the planes that the poles lay. The magnetic screens can be located with a gap relative to the magnetic path if connected by a bridge between the screens. The discharge chamber, the anode, and the magnetic system are symmetrically designed relative to two mutually perpendicular longitudinal planes.

Abstract: In a cathode-ray tube, in order to readily and inexpensively reduce an alternating electric field irradiated by a deflection yoke to a front of the cathode-ray tube through a funnel part and a face panel, a conductive film for forming an electric field shield is formed from a neck part to a cone part of a glass bulb and is electrically connected to another conductive film formed on a funnel body part. The deflection yoke is mounted on the conductive film via an insulation sheet interposed therebetween. The conductive film is grounded to form an equipotential surface of 0 V in front of the deflection yoke. A transparent conductive film can be also formed on the external surface of the face panel to raise the reduction of the alternating electric field.

Abstract: A cathode ray tube having degaussing coils attached to an outer side of a glass vessel of a funnel part of a main body of the cathode ray tube, in which the degaussing coils each include a flattened part, extended along the outer front surface at a front side of a funnel part, a circular part having a circular cross-section and a transition part interconnecting the end parts of the flattened part and the circular part and changed in cross-section shape from a flattened rectangle to a circle. The degaussing coil may has shape flattened partially to reduce the outer size of the cathode ray tube and includes a plastic case for retaining the coil in the flattened shape. The degaussing coil is stabilized in shape and is not deformed during transport while its attachability with respect to the cathode ray tube may be improved.

Abstract: A cathode-ray tube has a faceplate panel joined to a funnel. An internal magnetic shield is disposed within the tube and is connected to a bottom surface of a flange of a shadow mask frame. The flange of the shadow mask frame has a plurality of integral shield-retaining clips formed therein. Each of the clips overlaps at least a portion of the shield, to retain it in contact with the flange of the frame.

Abstract: A color cathode ray tube includes a face plate, and a selective light absorption film formed on the external surface of the face plate to improve the emission tint, the film having a predetermined characteristic of spectral transmittance. The selective light absorption film is formed of a coating material which consists of a base coating including an alcoholic solution of silicon alkoxide having --OH group or --OR group, and an organic or inorganic dye or pigment mixed into the base coating. Such a coating material is applied onto the external surface of the face plate to form the selective light absorption film. The selective light absorption film has main and auxiliary absorbing bands. If the fluorescent face of the face plate includes a blue fluorescent element of ZnS:Ag, a green fluorescent element of ZnS:Au, Cu and Al and a red fluorescent element of Y.sub.2 O.sub.

Abstract: A cathode-ray tube display device wherein a resistance material, e.g. graphite, is provided on each of a funnel portion, a cone portion and a neck portion of a cathode-ray tube, and a deflecting coil unit is mounted to the neck portion through an insulator, to shield an alternating electric field generated from the deflecting coil unit.

Abstract: A display apparatus comprises a CRT having an evacuated envelope including a faceplate with a luminescent screen on the interior surface thereof. An electron gun is disposed within a neck of the envelope for generating and directing at least one electron beam toward the screen. A funnel connects the neck of the envelope with the faceplate. A deflection yoke is disposed around the envelope at the junction of the neck and the funnel. The yoke is attached to the envelope with an adhesive. The envelope further includes a first conductive coating on the interior surface of the funnel, a second conductive coating on at least a portion of the exterior surface of the envelope, and a third coating on the exterior surface of the envelope underlying the yoke and connected to the second conductive coating.

Abstract: A headlamp for motor vehicles has a reflector having a light output opening, a gas discharge lamp arranged in the reflector, a screen covering the light output opening and means for shielding off interference radiation emitted by the gas discharge lamp and including a transparent interference-radiation-absorbing metallic coating.

Abstract: A three-electrode type electroluminescent lamp has a transparent electrode connected to a rear side lead conductor, and an electroluminescent body sandwiched between the transplant electrode and the backing electrode. A third plate-like electrode is laid over the backing electrode in an electrical insulation relation with the backing electrode, and a third lead conductor is formed of an integral extension of the third electrode. The integral extension of the third electrode extends outwardly from an edge of the third electrode near to the edge region of the transparent electrode connected to the base end portion of the first lead conductor, so as to avoid the edge region of the transparent electrode on which the base end portion of the first lead conductor is laid and also to extend along the first lead conductor excluding the base end portion. A printed-wiring board having a plurality of printed wirings is mounted on the electroluminescent lamp.

Abstract: An automotive lamp device includes a metal lamp housing having an opening for passing light therethrough, an electric-discharge lamp accommodated in the lamp housing to provide a required amount of light to be emitted by the lamp device, a lens having a series of modified prisms or ridges that bend the light beam generated by the discharge lamp into a desired pattern, a finisher disposed in an inner perimeter section other than a main lens section of the lens, for preventing propagation of the light beams through a section other than the main lens section of the lens. The finisher is made of metal and, in addition, electromagnetic shielding is employed in the lens for preventing undesirable electromagnetic radiation noise generated by the discharge lamp from leaking through the lens to the exterior of the lamp housing, while allowing the required amount of light to pass through the lens.

Abstract: A flat display device includes no exposed part of an insulated substrate on the inner wall of electron pass holes for attaining a high intensity of a display screen, high operational stability of the display screen, and having a simple structure for manufacturing it easily. In a control electrode, resistive films are formed on the exposed part of an insulated body. When the electrons pass through electron pass holes, electron beams are controlled without charging the insulated substrate by the electrons.

Abstract: A cathode ray tube has an external magnetic shield adapted for tight fitting positioning upon and about the funnel portion of the CRT. The external magnetic shield includes a shell preferably of conventional plastic and a soft magnetic material having high permeability and low coercivity. The soft magnetic material may be either disposed as a layer on the surface of the shell or distributed throughout the shell in the form of small particles. The external magnetic shield is installed over the CRT funnel following CRT evacuation and frit-sealing for improved magnetic shielding in a low cost, easily assembled magnetic shielding arrangement.

Abstract: A cathode ray tube has a vacuum envelope which includes a faceplate, an optical filter formed on the faceplate, the optical filter including mainly of SiO.sub.2 and containing a coloring material, and a phosphor layer formed on the inner surface of the faceplate. The optical filter includes silicon having a fluorine-containing group and a siloxane bond at least on the surface thereof, and a maximum light absorption wavelength in a range of 400 to 650 nm is in a region of 575.+-.20 nm, and where the transmissivity for the wavelength of 450 nm is T.sub.450, that for 530 nm is T.sub.530, that for 550 nm is T.sub.550, that for 630 nm is T.sub.630, and that for the maximum absorption wavelength is Tmin, the following relationship is established:Tmin.ltoreq.T.sub.550 .ltoreq.T.sub.530,1.ltoreq.T.sub.450 /T.sub.539 .ltoreq.2,1.ltoreq.T.sub.630 /T.sub.530 .ltoreq.2,0.7.ltoreq.T.sub.450 /T.sub.630 .ltoreq.1.43.

Abstract: A grounded metallic shield which comprises an electrode enclosing the filament leads and emitters of an e-Gun in a high vacuum chamber of the type used in melting and casting metals and other materials and evaporation sources. The shield is spaced from the filament leads and emitters a distance in the order of the electron mean free path for the pressure uses within the high vacuum chamber. The structure and method of use thereof suppresses or eliminates arc-downs or glow discharges.

Abstract: A color cathode ray tube has a coating film formed over an outer surface of a face plate. The coating film prevents a charge-up phenomenon of the face plate and also has a function for improving a contrast performance of the color cathode ray tube. The coating film is composed of a polymer of silicon alkoxide, translucent conductive particles and plural types of dyes or pigments. The absorption peak of the main absorption band of the coating film is set in the range between the main spectrum wavelength of 570 nm of the green luminescence and the main spectrum wavelength of 610 nm of the red luminescence of the color cathode ray tube. The absorption peak of the sub absorption band of the coating film is in at least one of a first range between a wavelength of 380 nm and a wavelength of 420 nm and a second range between a wavelength of 470 nm and a wavelength of 510 nm.

Abstract: An improved electron beam deflector with incorporated permanent magnets for picture correction, where the magnets and the magnetic field generated by these magnets are surrounded by an auxiliary magnetic shielding that forms one piece with the deflector and is positioned with high geometrical precision with respect to the magnets. This auxiliary shielding causes the picture correction efficiency to be unaffected by the shape and geometry of positioning of the metal elements in the vicinity of the deflector when it is being assembled and during its operation. The deflector can be used with picture tube devices, particularly of the cathode-ray type.

Abstract: A high tension cable device with a series gap wherein an extraordinary discharge such as a creeping discharge which may occur along an outer face of a glass tube of a discharge tube is prevented effectively and a process of producing the same are disclosed. The high tension cable device comprises an electrically insulating tubular casing and a connecting terminal for the connection to a terminal of an ignition plug of an engine. The connecting terminal is fixedly fitted in the inside of an end portion of the casing, and a high tension cable is fitted in the other end portion of the casing. An additional function part such as a discharge tube for the formation of a series gap is mounted in the inside of the casing and coupled at an end thereof to the connecting terminal and at the other end thereof to the high tension cable, and an electrically insulating resin material is filled in a spacing in the inside of the casing.

Abstract: A coiled-coil incandescent body (5) of an electric incandescent lamp has a single coil intermediate portion (12) extending axially in the lamp vessel (1) and surrounded by a support member (20). The support member comprises an open ring (21) with ends (22, 23) defining a gap (24). Portions (25, 26) of these ends (22, 23) extend towards the axis (2) and have bent end portions (27, 28) which are inserted into secondary turns (13, 14) of the incandescent body (5). The support member (20) cannot be shifted along the incandescent body (5).

Abstract: A cathode ray tube has an insulating layer formed at at least a part of the outer surface of a neck tube.The insulating layer is a layer obtained by coating and baking a sol prepared by dispersing one or two or more metal alkoxides and metal salts in a hydrophilic oligomer state by adding water and an acid to a solution having one or two or more metal alkoxides and metal salts dissolved in an organic solvent such as an alcohol.

Abstract: a cathode ray tube comprises an envelope including a faceplate with an inner and outer surface and an antistatic layer covering the outer surface of the faceplate for discharging static charges accumulating in the faceplate. The antistatic layer is formed by using a solution containing an alcoholate of silicon as main constituent. The antistatic layer contains a stabilizing substance for maintaining antistatic characteristics. The antistatic layer also has light filtering characteristics when the layer contains xanthene dye as filtering substance.

Abstract: A ballast transformer for fluorescent reflector lamp assemblies used in screw-type sockets for conventional incandescent bulbs.

Abstract: A triple point screen which electrically insulates the high voltage electrode in the discharge region of a gas discharge laser system. The screen is formed from an inorganic dielectric to withstand the corrosive atmosphere of the gas discharge laser. The triple point screen has a grounded conductive metal screen molded into the dielectric and positioned close to the triple point of the anode to substantially reduce the strength of the electric fields at the triple point.

Abstract: The present invention provides an improved grounding system for a kinescope having a conductive outer coating. The system includes a conductive metal tape having an adhesive on one surface thereof and exposed metal on the other surface thereof. The metal tape is adhered to the kinescope by its adhesive side. The metal tape extends from the conductive outer coating to means on the kinescope connecting to an electrical ground, and it is in electrical contact with the coating and interconnecting to the electrical ground through the means.

Abstract: A cathode ray tube according to the present invention has a sufficient antistatic property which can be obtained by forming a glass film containing SiO.sub.2 or P.sub.2 O.sub.5 as a main component and a hygroscopic metal salt on the outer surface of its front panel.

Abstract: An electric lamp, such as an infrared lamp, including a sealed outer envelope having a sealed end portion in which are positioned a pair of electrical conductors. Centrally positioned within the outer envelope is a sealed inner, light-transmitting envelope which includes therein a coiled tungsten filament. A pair of conductive members, coupled to the filament, project externally from opposing sealed end parts of the inner envelope. One of these projecting conductive members is electrically connected to a respective one of the electrical conductors while the other conductive member is electrically connected to the remaining conductor through the utilization of a thin, conductive molybdenum reflector which is positioned within the outer envelope adjacent the sealed, inner envelope.

Abstract: This invention provides a cathode-ray tube having an antistatic film formed mainly by metal oxide and containing particles of at least one metal selected from the group consisting of Pd, Sn, Pt, Ag and Au, the particles having an average particle size of 0.01 micron at most. The film can be easily formed from a solution, thus, reducing the cost.

Abstract: A gas discharge apparatus includes a discharge chamber including a transparent dome portion and an electrode-including base portion, which together enclose an ionizable gas. A cup-shaped base member is affixed at its periphery to the edge of the base portion of the discharge chamber. A power supply and discharge excitation network is disposed within the interior of the base portion. The power supply and discharge network include a pair of terminals. An oscillator and associated step-up output transformer powered from the terminals is positioned between the terminals and the discharge chamber. A field shield including a conductive sheet member is positioned between the terminals and the discharge chamber. The field shield is adapted to be electrically coupled to the electrode so that discharge-supporting electric fields may be established in the discharge chamber between the electrode and through the dome portion of that chamber to an effective ground electrode exterior to the chamber.

Abstract: A thick film luminescent device includes a substrate which supports a first and second electrode, the electrodes being separated from each other by an electroluminescent layer. Each of the electrodes has a conductor connected thereto including a terminal portion remotely situated from the electrode. An insulated layer opposite the substrate covers all of the conductors and electrodes except for the terminal portions. A conductive shielding layer is provided which is substantially coextensive with the insulated layer, the shielding layer including a terminal portion adapted to be connected to a suitable ground so as to prevent signal interference between the thick film luminescent device and adjacent electronic circuitry.

Abstract: A fluorescent reflector lamp assembly for use in screw-type sockets for conventional incandescent bulbs includes an Edison-type base connector, a generally annular ballast housing, a reflective shell formed of a heat-conducting material and having a tubular base adapted to seat within a central recess encompassed by the ballast housing, and a receiving member mounted in the recess to receive a fluorescent lamp whose base abuttingly engages a substantial area of the sidewall of the reflector base.

Abstract: The invention provides efficient means for dissipating deleterious charge build-up in the glass neck portion of a color cathode ray tube employing an in-line plural beam electron gun assembly. In one embodiment, the invention is comprised of two longitudinal stripes of electrical conductive material oppositely applied on the neck substantially over both narrow sides of the gun assembly. Connective conductors join the stripes to the grounded funnel coating to provide for dissipation of the charge. In another embodiment, the longitudinal stripes are joined by two band-like layers encompassing inter-electrode spacings of the gun assembly.

Abstract: A cathode-ray tube comprising a glass viewing window having, on its external viewing surface, an antistatic, glare-reducing, image-transmitting coating. The coating has a rough surface and is composed essentially of a silicate material and a metallic compound in proportions to impart the desired antistatic characteristic without substantially degrading the image-transmitting capability of the coating. When the tube is operated, the coating is grounded either directly or through the metal implosion-prevention system on the tube.

Abstract: A cathode-ray tube has in a neck section of a hermetically sealed, evacuated envelope an electron-gun mount assembly in which of a cathode for emitting an electron beam, a first grid electrode section for forming a crossover point and for accelerating the electron beam and a second grid electrode section for focusing the electron beam are mounted on a plurality of insulative supporting bars. A conductive member is provided on an outer surface portion of the neck section, an inner surface portion thereof, and/or an outer surface portion of the supporting bars which surround a portion of the electron-gun mount assembly including the first grid electrode section but excepting the second grid electrode section.

Abstract: In high-voltage vacuum-tubes, specifically X-ray tubes, comprising an electrode (anode) which carries a positive high voltage and which is connected to a conductive part (for example the metal tube envelope) via an insulator, flashover may occur at very high temperatures. In order to preclude such flashover a shielding electrode is arranged at a small distance from the insulator and has such a shape that the electric field strength at the location where the insulator is connected to the conductive part is reduced.

Abstract: A fluorescent display device of the type that the phosphorous luminous display is observed through an external surface of a transparent substrate. The internal surface of the anode sections composed of transparent conductive layers having phosphor layers deposited thereon. The device includes insulating layers deposited on the conductive films except the anode sections on which the phosphor layers are deposited so as to effect luminous display which is clear, distinct and free from display defects.

Abstract: A grounded metallic shield which comprises an electrode enclosing the filament leads and emitters of an e-Gun in a high vacuum chamber of the type used in melting and casting metals and other materials and evaporation sources. The shield is spaced from the filament leads and emitters a distance in the order of the electron mean free path for the pressure uses within the high vacuum chamber. The structure and method of use thereof suppresses or eliminates arc-downs or glow discharges.