Abstract: In a laminated channel plate electron multiplier, an apertured metal sheet (32) is disposed at a small distance (30 .mu.m) from the outer surface of the input dynode and is used to provide a small negative field for turning back stray secondary electrons which have sufficient energy to follow trajectories across the input side of the input dynode. More particularly, the areas between the apertures of the input dynode (22) are masked by a material (34) having a secondary electron emission coefficient of less than 2, which material (34) is provided on the outer surface of the apertured metal sheet (32), the metal sheet (32) being spaced from the input dynode (22) by an insulating material (36). A potential of the order of -10 V relative to the input dynode is applied to the apertured metal sheet (32).

Abstract: A fluorescent display tube of the type that luminous display is observed through a substrate is disclosed which is capable of accomplishing luminous display easily observable in a light environment as well and without any display defect, providing luminous display with a wide visual angle and simplifying the manufacturing process. The fluorescent display tube includes a substrate made of a light-permeable and light-scattering insulating material and a metal film deposited on the substrate which has a color similar to non-luminous color of anodes and also acts as feeder paths. The metal film is formed with openings corresponding to the shape of a display pattern in which transparent anode conductors each having a fluorescent layer deposited thereon are received.

Abstract: A spark plug for internal-combustion engines has a spark discharge gap defined between at least two electrodes opposing to each other, and a platinum-containing wear-resistant discharging layer provided on one of the electrodes. The spark plug has a thermal stress relieving layer disposed between the discharging layer and the base metal constituting the one eletrode. The thermal stress relieving layer is made of a platinum base alloy containing nickel, which constitutes the base metal. The discharging layer may be made of a material consisting essentially of 70 to 90 wt % platinum and 30 to 10 wt % iridium. The thermal stress relieving layer may be made of a material consisting essentially of 5 to 95 wt % platinum and 95 to 5 wt % nickel. Another platinum-containing wear-resistant layer may be provided on the other electrode, the wear-resistant layer being made of a material consisting essentially of 5 to 60 wt % nickel and 95 to 40 wt % platinum.

Abstract: A cathode-ray tube for color display comprises a face plate (1), a picture element layer (10) formed on an inner surface of the face plate and including two or more kinds of picture elements (5, 6 and 7), and a fluorescent material layer (4) formed between the picture element layer and the inner surface of the face plate and having a 10 percent afterglow time less than 50 microseconds. As necessary, a photoabsorptive material layer (2) may be provided in a matrix manner between the fluorescent material layer and the face plate. The picture element layer (10) performs a color display function and the fluorescent material layer (4) performs a communication function by means of a light pen. In case that a communication function by means of a light pen is not required, the step of forming the fluorescent material layer (4) may be omitted.

Abstract: In order to obviate the necessity for design compromise of spark plugs with respect to their operating temperature, so that the ceramic insulator (18) of the spark plug will rapidly reach the temperature at which deposits thereon will inherently burn off (about 400.degree. C.-450.degree. C.) while not becoming so hot as to cause spurious glow ignition within the combustion chamber of an internal combustion (IC) engine, the end portion of the insulator is formed with a central opening (19/3) within which a metal core (24) is included which has a temperature coefficient of expansion such that, at temperatures below between 400.degree. C.-450.degree. C. it is spaced by a narrow gap (25) from the inner surface of the insulator (see FIG. 1) but, as the spark plug becomes hot, the gap 25 closes (FIG. 2), thereby providing good heat transmission from the insulator to the center electrode structure (21, 23, 24) and thereby maintaining the insulator at a temperature below that at which it might glow.

Abstract: The photocathode is of the type which comprises a photo-emissive layer consisting of at least an active layer of the P-type, a solid support for said semiconductor of a material which is transparent to radiation, a layer having a bonding glass for the photo-emissive layer on the support. The invention is characterized in that the support comprises two parts situated one on top of the other and which are bonded together, namely a thick second part (thickness for example 5 mm) of a type of glass having properties of thermal expansion which are substantially identical to those of the bonding glass and a part in the form of a disk-shaped first part (thickness for example 1 mm) of a material having softening and transition points which are much higher than those of the bonding glass and of the glass of the thick part.

Abstract: A high pressure, tungsten halogen lamp wherein a predetermined quantity of a gas mixture including an inert gas (e.g., argon) and halogen compound (e.g., methyliodide) constitute the lamp's combined atmosphere. The gas mixture is flowed into the tubular member which ultimately comprises the lamp's envelope and is then cooled sufficiently to form either a pool of liquified gas or, alternatively, a frozen, solidified member. A quantity of nitrogen gas established at a predetermined atmospheric pressure is also flowed into the tubular member while a press sealing operation is accomplished to seal the member. When the lamp is then subjected to normal room temperature, the pool (or solidified member) becomes gasified to produce the elevated internal pressure, which may readily approach three atmospheres.

Abstract: In-line electron gun structure for color cathode ray tubes in which the final focusing and accelerating electrodes each employ three in-line tapered, partially overlapping apertures in facing relationship, and at least one aperture opening, preferably the central aperture of the focusing electrode, is elongated to provide electron beam spot-shaping.

Abstract: An electron gun having arc suppression means is described. In one of the preferred embodiments of the electron gun, at least one cathode is provided for generating an electron beam along a beam path. A plurality of electrodes are serially disposed along the beam path. The electrodes include at least one low voltage electrode and at least one high voltage electrode. A plurality of resistors interconnect selected ones of the electrodes. The interconnected electrodes normally operate at substantially the same voltage, and the resistors act as a voltage divider in the event of an arc and prevent damaging cascading arcs.

Abstract: A cathode ray tube apparatus having a metal body with heat radiation effect which is located at least at a front periphery of a front panel of the cathode ray tube, a transparent panel located at the front of the front panel and facing the front panel with a predetermined distance therebetween, the metal body abutting the front periphery of the front panel and a periphery of the transparent panel to form a space therein; and transparent coolant sealed in the space.

Abstract: The invention relates to an electric incandescent halogen lamp for a motor-car, in which the substantially flat pinch allows the passage of internal current input conductors, between which two filaments are stretched. One current input conductor supports a cap constituting a screen of for a filament for giving a dipped beam and is prolonged into a curved end portion which is situated in a longitudinal plane perpendicular to the plane of the pinch and rests against the tubular wall of the bulb.

Abstract: An improved color picture tube according to the invention includes an evacuated envelope enclosing an apertured mask attached to a frame which are suspended in relation to a cathodoluminescent screen by novel support means. The tube also includes an electron gun for forming a plurality of electron beams and directing the beams through the mask to the screen. An axis passing through the center of the electron gun and the center of the screen is the longitudinal axis of the tube. The screen also includes a major axis and a minor axis which are perpendicular to each other and perpendicular to the longitudinal axis. The support means includes a plurality of studs embedded in the envelope and spaced around the frame and a plurality of springs. Each spring has an aperture at one end engaged with one of the studs and each spring is attached at the other end to the frame.

Abstract: With the addition of a conductive means in the form of a grounded ring or member placed at the insulator means of a high voltage spark electrode structure, the required break down voltage of the spark gap can be reduced. The conductive means typically would be a ring encircling the insulator means of the electrode structure and would provide a ground as well as a mechanical support near the end of the insulator means of the electrode structure.

Abstract: A discharge lamp provided with a U-shaped discharge tube and an outer envelope surrounding this tube. The bend of the discharge tube is supported with respect to the outer envelope by means of a metal member of sheet material. A few strips of this member engage the bend of the discharge tube. The metal member is composed of two parts twisted together which provide together a substantially light-tight transverse separation between the outer envelope and the discharge tube. The metal member maintains the bend of the operating lamp being kept at a relatively high temperature to improve luminous efficacy.

Abstract: The invention relates to a high-pressure sodium lamp provided with an elongate discharge vessel in which the pressure P in the operative condition of the lamp is at least 170.times.10.sup.3 Pa. The lamp is suitable to be operated with a power of periodically alternating value, which power comprises at least one component having a frequency .nu..sub.i which satisfies i-0.45.ltoreq.2.35.nu..sub.i Le/e.ltoreq.i+0.45 where i is an integral positive number, c is the speed of sound in the gaseous part of the filling and L.sub.e is the effective length of the discharge vessel. According to the invention, the relation is satisfied: M.nu..sub.i .multidot.f.sub.i .multidot.P.multidot.d .ltoreq.185, in which M.nu..sub.i is the modulation depth of the power component having a frequency .nu..sub.i, f.sub.i is a geometric lamp factor and d the average inner diameter of the discharge vessel. In this manner, the operation of the lamp is free of arc instabilities due to longitudinal acoustic resonances.

Abstract: A compact fluorescent lamp composed of at least four tubes having their ends hermetically sealed in receptacles. Two of the tubes have electrodes sealed therein and passages formed in the receptacle connect the other ends of the tubes to complete the arc path.

Abstract: An inline electron gun for a cathode-ray tube includes a plurality of cathodes, a control grid, a screen grid and a main focus lens arranged successively in alignment with the cathodes for focusing a plurality of electron beams onto a screen. The screen grid has a given thickness with a plurality of transverse slots formed therein. The slots have a depth less than the thickness of the screen grid. An aperture is formed in each of the slots. The outer slots are asymmetric with respect to the apertures therein and are displaced transversely toward the center aperture. The transverse slots in the screen grid compensate for the vertical flare distortion of the beam spot at off-center positions on the screen and the asymmetric location of the outer slots reduces the horizontal convergence sensitivity of the outer beams with respect to focus voltage change.

Abstract: A beam guide assembly for a flat panel display device includes a plurality of meshes arranged in a spaced parallel relationship. Insulative supports permanently retain the meshes in a desired spaced relationship. Shields are arranged between the various meshes to shield the beam guide assembly from external electric fields and to prevent the insulative supports from being charged by stray electrons and deleteriously effecting the paths of the electron beams.

Abstract: An image sensing device includes a wafer of semiconductor material having a first surface and a second surface. The first surface has a central portion comprising a membrane, which is surrounded by a rim. The membrane is of lesser thickness than the rim. An improved support assembly for the device comprises a lower support member in contact with the rim portion of the second surface of the wafer near the periphery thereof, and an upper tensioning member having a target contact portion which forcibly abuts the rim portion of the first surface of the wafer adjacent to the membrane and urges the wafer against the lower support member thereby tensioning the membrane. Centering brackets center and secure the lower support member and the upper tensioning member within the device.

Abstract: An electron tube having an evacuated envelope includes therein an insulating substrate with a photoemissive cathode thereon. The cathode comprises a plurality of discrete substantially isolated photoemissive regions. A plurality of spaced apart conductive strips are disposed on the substrate and interconnect each of the photoemissive regions.