Abstract: An ion source is disclosed in which a crucible for holding an ion source material is provided with an aperture in its bottom wall, an emitter chip is disposed within the crucible in a coaxial manner so that the edge of the emitter chip passes through the aperture, a semi-closed crucible made of a conductive material and having the form of a circular cone is disposed in the vicinity of the tip of the emitter chip so as to be coaxial with the emitter chip and to have the same electric potential as the emitter chip, a filament for emitting an electron beam is disposed in the vicinity of the emitter chip, an ion extracting electrode is disposed at a place which is a little spaced apart from the tip of the emitter chip, and a lid is inserted into the ion source material holding part so as to be placed on the above-mentioned semi-closed crucible, thereby preventing the ion source material from being scattered by evaporation.

Abstract: A device for converting the kinetic energy of an intense relativistic electron beam (IREB) into trains of multi-gigawatt AC electrical pulses comprising a foilless diode for generating an IREB and injecting the IREB into one end of a drift tube. The device further includes a modulating circuit for modulating the IREB current while in the drift tube to obtain longitudinally spaced bunches of electrons, and a coaxial transmission line with the end of its center conductor disposed across the other end of the drift tube in the path of the IREB. A gap is disposed between the end of the drift tube and the end of the center conductor. The modulated IREB induces a voltage in the coaxial transmission line. This voltage appears across the gap to slow down the electrons and to convert the kinetic energy of the IREB into electrical energy that propagates along the coaxial transmission line.

Abstract: An impedance matching network for continuously and automatically maximizing RF power transfer to a plasma emission torch includes a dual phase detector network. Signals from the detector network control, via a control unit, a variable impedance network.

Abstract: The invention is directed to a method of preventing cathode damage when switching on an electron gun having a field emission cathode assembly including a cathode, a first electrode and a ground electrode. During normal operation of the electron gun, an extraction voltage is applied across the cathode and the first electrode and an accelerating voltage is applied across the cathode and the ground electrode. A direct galvanic connection is established between the cathode and the first electrode prior to normal operation of the electron gun. During a burn-in period, only the accelerating voltage is applied. This accelerating voltage may include an overvoltage of up to twenty percent. Then the galvanic connection between the cathode and the first electrode is interrupted and the extraction voltage is applied. An arrangement for carrying out the invention is also disclosed.

Abstract: A tungsten-halogen lamp including a tubular quartz envelope wherein both of the lead-in conductors designed for providing electrical energy to the lamp's coiled filament are strategically positioned within a single, press-sealed end portion of the lamp's envelope. Electrical connections to the lamp may thus be provided at only one end thereof to thereby facilitate positioning and connection of the lamp within a photocopier or similar machine. The lamp is suited for high wattage applications (i.e., about two-hundred watts per linear inch of filament or greater) by the utilization of an expansion coil section which is provided in one of the lamp's two lead-in conductors to prevent bowing of the lead-in conductor and its quartz sleeve. This coil section enables the conductor to expand during the high temperatures encountered when the lamp is operated at such high wattages.

Abstract: Undesired light radiations emitted by europium activated red luminescent phosphors employed in projection color televisions are greatly reduced, with essentially no reduction in the desired radiation, by employing as a filter a solution containing a soluble holmium salt and a soluble neodymium salt.

Abstract: A multicolor cathode-ray tube for use as a light source in a giant display system such as a display board for a sports stadium. The cathode-ray tube includes a plurality of electron guns and respective fluorescent screens, the latter receiving the beam from a corresponding electron gun. Each of the screens is slanted towards the longitudinal axis of the tube. The screens may be either flat or curved.

Abstract: An electrodeless discharge resonance lamp for producing light by microwave excitation of gas molecules is disclosed. The lamp comprises a head having a passage therethrough and a gas inlet port in communication with the passage. A window is removable mounted in the passage and a collimator is removably mounted in the passage adjacent and exterior to the window. Gas flow tubing is positioned in the passaged such that one end of the tubing is located between the gas inlet port and the window and the other end of the tubing extends out of the opposite passage. The tubing is smaller than the inside diameter of the passage to allow gas to flow therebetween. Finally, there are means for removably securing the tubing in place and microwave excitation means in communication with the tubing adjacent and exterior to the head.

Abstract: A picture display panel is provided having an envelope with internal reinforcement partitions formed onto a display window. The display window is provided with substantially V-shaped grooves on the outside opposite to contact surfaces with the reinforcement partitions. The reinforcement partitions thus become substantially invisible from the outside. The outermost edges of these V-shaped grooves are preferably rounded, and the picture display window surface between juxtaposed grooves may be convexly curved into cylindrical lenses to make the reinforcement partitions even more invisible.

Abstract: An electrodeless fluorescent lamp having a core of magnetic material surrounded by a coil for producing a high-frequency magnetic field in a lamp vessel surrounding the core and coil. An amalgam holder is located in the vessel, in the region surrounding the core where the electric discharge is formed so that the amalgam is heated directly by the discharge. Substantially all the mercury contained in this amalgam is released quickly after the lamp is turned on, so that the light output rises rapidly.

Abstract: An improvement in a tension mask type color cathode ray tube comprising an envelope funnel that includes a bell portion, one extremity of which has a sealing land. The tube further comprises a flat face panel formed of a material having a predetermined temperature coefficient of expansion. The panel has a target area adapted to receive a pattern of luminescent color phosphor deposits. A sealing surface circumscribes the target areas. The improvement concerns a constituent structure which is disposed between the funnel sealing land and the panel sealing surface and which is frit sealed therebetween. The structure defines a central opening which is dimensioned to enclose the panel target area and it is formed of a material having a temperature coefficient of expansion approximating that of the face panel. The structure itself comprises means which define a support surface that confronts the target, which surface is adapted to fixedly receive a tensed color selection mask.

Abstract: A tube for amplifying high-frequency multi-kilowatt, amplitude-modulated signals utilizes a linear beam of electrons which is density-modulated by a permeable control grid spaced close to a thermionic cathode. The beam is focused through a drift tube having two axially spaced gaps, each coupled to a resonant circuit such as a hollow cavity. The first circuit is tuned to a resonant frequency higher than the signal frequency to produce velocity-modulation bunching of the beam electrons in phase with the density-modulation from the grid. The second circuit is tuned to the signal frequency and its energy is coupled out to an external load. The grid modulation is Class B or Class C so there is no current between the electron bunches. The floating bunching circuit can thus, by velocity modulation, produce very dense bunches to excite the output circuit, providing very high conversion efficiency.

Abstract: A low-pressure mercury vapor discharge lamp in which a rare gas and mercury are provided in an outer bulb, which in turn contains therein a plurality of bent inner tubes, each having an opening at an end and an electrode at the other end thereof. A starting probe is provided between the openings in the outer bulb. An operating circuit or starter is connected to the electrodes. Further, a starting probe circuit is connected to the starting probe to apply a high voltage to the starting probe at the time of ignition.

Abstract: An electroluminescent device comprising a composite structure including first and second electrodes, first and second electroluminescent layers between said electrodes, and an electrically-insulating layer between and contacting both of the electroluminescent layers, said electrically-insulating layer having a substantially-uniform thickness in a range that permits substantial tunnelling of electrons therethrough when as little as 10 to 30 volts are applied across said electrodes.

Abstract: An electric, incandescent lamp including an electrically insulating (e.g., plastic) base which is securedly positioned on the lamp's sealed end portion without the need for adhesives or the like. The base functions to securedly retain the lamp's lead-in wires (a total of four in a dual filament lamp) in a preestablished alignment externally of the lamp's sealed end (from which the wires project) to thereby assure positive electrical connection thereto when the lamp and base are inserted within a corresponding electrical socket. The invention is ideally suited for use in a tail light assembly for an automobile.

Abstract: A field emission type electron gun comprises a cathode, a plurality of anodes opposing in series to the cathode and a filament for heating the anodes, all being contained in a vacuum tube. The filament is placed immediately before a first anode directly opposing the cathode in a symmetrical manner so as to serve both as a gas expelling member and as an anode.

Abstract: An electron gun assembly includes a plurality of cathode assemblies and a plurality of spaced successive electrodes mounted on at least two electrically-insulative support rods. At least one of the electrodes comprises a deep-drawn substantially rectangular cup-shaped member having a base portion, a supporting flange portion, including a plurality of attachment tabs, and a sidewall extending therebetween. The sidewall includes a plurality of reinforcing ribs formed therein which extend substantially from the supporting flange portion to the opposite end of the sidewall adjacent to the base. The reinforcing ribs minimize the flexure of the sidewall.

Abstract: A tension mask color cathode ray tube comprises an envelope funnel having a central axis and including a bell portion, one extremity of which has a sealing land. A flat or cylindrical face panel has a target adapted to receive a pattern of luminescent primary color elemental phosphor areas, with a sealing land circumscribing the target. A color selection electrode structure sealed between the sealing lands of the funnel and panel constitutes an integral part of the tube envelope. The electrode structure has a central opening dimensioned to enclose the panel target, and includes a frame supporting a tensed foil color selection electrode. The frame has a support surface fixedly receiving and maintaining the electrode in tension. The frame further has an axial dimension which establishes the color selection electrode at a predetermined Q-distance from the target on the face panel.