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| Number | Title | Issue Date |
| 5172027 | Wire shaped electron source A wire shaped electron source includes a heating core wire, an insulator partially provided on the heating core wire, and an electron emission material provided on the heating core between the insulators. The thickness of the electron emission material is... | 12/15/1992 |
| 5138221 | Inorganically insulated heater, and cathode ray tube and air flow sensor using the same The present invention relates to an inorganically insulated heater having a long life for use in air flow sensors, cathode ray tube cathode heaters etc., wherein the distribution of inorganic insulating particles of the whole insulating layer is made unif... | 08/11/1992 |
| 5001397 | High-pressure gas discharge lamp having electrodes with coil layers having interlocking turns The high-pressure gas discharge lamp according to the invention has electrodes which comprise an electrode rod 24 and a helical winding 26 near its tip 25 projecting into the lamp vessel, both of mainly tungsten. The winding 26 has a first layer of turns ... | 03/19/1991 |
| 4973878 | Filament structure and method of making such structure A method of making an axial filament structure for a lamp in which the filament is concentric with the axis of the envelope, wherein a hook-like shape (131) is formed in a support member (117) which stretches the filament to its final turns-per-inch ratio... | 11/27/1990 |
| 4939411 | Composite vacuum evaporation coil A composite vacuum evaporation coil including a base coil and an overwind coil is characterized by the overwind coil being independent of the power source and being confined to the area of the turns of the base coil. Such a composite coil has improved eff... | 07/03/1990 |
| 4918354 | Compact coiled coil incandescent filament with supports and pitch control This invention provides an improved compact fine wire incandescent lamp coiled-coil filament and method for making the same. The filament has a secondary mandrel ratio in the range of about 3.0 and a primary mandrel ratio which is less than or equal to th... | 04/17/1990 |
| 4893057 | High intensity discharge lamp and electodes for such a lamp An HID lamp incorporates all-metal electrodes providing rapid transition of the arc to the electrode tip. The electrode comprises a length of thoriated tungsten wire having a close wrapped coil between connection and tip ends, so that rapid heating of the... | 01/09/1990 |
| 4886995 | Heater for indirectly-heated cathode The improved structure of a heater for an indirectly-heated cathode which is used for CRTs or the like is disclosed. A core wire for a heater is wound around a mandrel into a primary winding so that the inner diameter of the primary winding is 4.3 to 6.0 ... | 12/12/1989 |
| 4847534 | High-pressure discharge lamp with torsionally wound electrode structure The high-pressure gas discharge lamp according to the invention has electrodes comprising a rod of mainly tungsten and a helical winding of mainly tungsten near the tip of the rod. The winding has a first layer of turns, which is integral with a second la... | 07/11/1989 |
| 4825119 | Low consumption electron gun for cathode ray tubes A low consumption electron gun is provided for cathode ray tubes. The heating filament of the cathode includes a resistant wire and lugs for connection to an electric energy supply. The resistant wire is wound spirally. The active part of the heating fila... | 04/25/1989 |
| 4760306 | Electron emitting filaments for electron discharge devices Electrons are copiously emitted by a device comprising a loop-shaped filament made of lanthanum hexaboride. The filament is directly heated by an electrical current produced along the filament by a power supply connected to the terminal legs of the filame... | 07/26/1988 |
| 4745325 | Heater for indirect-heated cathode Disclosed is a heater for indirect-heated cathode having a heating element composed of a wire with a high specific resistance, such as titanium or titanium-based alloy, around which another wire with a low specific resistance is wound, and having a heat-r... | 05/17/1988 |
| 4733124 | Cathode structure for magnetron A cathode structure for a magnetron representative of a self-oscillation type microwave electron tube comprises a pair of opposite end shields for supporting both ends of a filament helically wound in an axial direction, and a getter fixed on at least an ... | 03/22/1988 |
| 4728850 | Mounting means for mounting spiral wire cathodes In a mounting device for electrically heated, spirally wound wire cathodes in electron guns, two mounting posts joined together by an insulator are configured as sector-shaped sections of a hollow cylinder, and have each a circumferential groove on its en... | 03/01/1988 |
| 4686412 | Reflector-type lamp having reduced focus loss This invention provides for an improved reflector-type lamp having reduced focus loss and exhibiting an increase in reflector collection efficiency. Stray light from the lamp's light source is reduced and channeled into the central angular region of the r... | 08/11/1987 |
| 4683397 | Compact incandescent coiled coil filament This invention provides an improved compact fine wire incandescent lamp filament and method for making such having a primary mandrel ratio in the range of about 1.40 to about 4.00 and a secondary mandrel ratio which is greater than or equal to the primary... | 07/28/1987 |
| 4636749 | Pulsed magnetron tube having improved electron emitter assembly A tuning assembly (42) is disclosed for selectively oscillating the frequency of an electromagnetic field within a hermetically sealed pulsed magnetron (12), comprising a rigid, hermetically sealed housing (14), apparatus for generating the electromagneti... | 01/13/1987 |
| 4611146 | Indirectly heated cathode An indirectly heated cathode including a conductive cup having a closed end provided with an exterior surface coating of electron emissive material and an electrically insulated heater element disposed axially within the cup. The heater element comprises ... | 09/09/1986 |
| 4556822 | Mounting structure and related method both for a multi-filament incandescent lamp An improved mounting structure for a three-way incandescent lamp is disclosed. The improved mounting structure has a three-pillar stem in which the conductive leads rigidly dispose a minor and major filament within the three-way incandescent lamp. The imp... | 12/03/1985 |
| 4506187 | Lamp filament structure, and method of its manufacture The amount of emitter paste which can be applied to the filament used in orescent tubes can be increased by winding the filament, as previously proposed, about an iron or molybdenum mandrel which can be dissolved; in contrast to the prior art, however, t... | 03/19/1985 |
| 4499401 | Triple coil incandescent filament This invention relates to a single strand filament wire arranged into a triple-coil filament for an incandescent lamp. The triple-coil filament has selected dimensions that do not require recrystallization of the tungsten wire of the triple-coil filament ... | 02/12/1985 |
| 4441048 | Cathode for a gas discharge tube A tungsten double coil covered with cathode material made from a paste of carbonate mixed with organic solvent. The coil is mounted around a molybdenum cylinder having a cavity in which a heater is installed.... | 04/03/1984 |
| 4355259 | Heater for an indirectly heated cathode In a cathode heater, the portion of the coil adjacent to the emitting surface of the cathode has a smaller pitch or is covered with an oxide coating of lower capacity of heat per unit of length than the distant portion. As a result, the emitting surface i... | 10/19/1982 |
| 4316116 | Triple-coil incandescent filament This invention relates to multiple coiled incandescent filaments and more particularly to a single strand filament wire, coreless, triple-coil filament for an incandescent lamp having mandrel ratios in either or both its second or third coiling less than ... | 02/16/1982 |
| 4310603 | Dispenser cathode A dispenser cathode is fabricated by covering a reservoir of electron emitting material with a perforated metal foil having an appropriate pattern of pore-sized apertures thereon for providing uniform electron emission from the cathode surface. The electr... | 01/12/1982 |
| 4283653 | High emissivity filament for energy conserving incandescent lamps with infrared radiation returning envelopes An incandescent lamp having a coating thereon which returns infrared energy to the filament to decrease the amount of power consumed by the lamp in order to maintain the filament at a predetermined operating temperature has a predetermined fractional spac... | 08/11/1981 |
| 4277714 | Metal halide arc discharge lamp having coiled coil electrodes An electrode for a metal halide arc discharge lamp comprises a coiled coil on a tungsten rod, the rod diameter being equal to W0.56 /0.784 mils, where W is the input power to the lamp in watts. The primary wire for the coiled coil equals D... | 07/07/1981 |
| 4233540 | Magnetron for microwave oven A magnetron for microwave ovens, wherein the thickness d of a coiled filament constituting a cathode in the axial direction of the cathode bears a ratio d/p of 0.3 or less to the pitch p of turns of the coiled filament in the axial direction of the cathod... | 11/11/1980 |
| 4208609 | Squirm resistant filament Low wattage incandescent lamp filaments have improved squirm resistance when wound with low mandrel ratios and high pitch ratios. Squirm resistant is further enhanced when the filament is mounted under tension.... | 06/17/1980 |
| 4196368 | Improving incandescent bulb efficiency Incandescent light bulb efficiency is improved by: (1) modifying the surface micro-structure of a lamp filament in such a way as to increase the emissivity in the visible region of the spectrum without significantly increasing this quantity outside this s... | 04/01/1980 |
| 4160929 | Incandescent light source with transparent heat mirror An incandescent lamp having a transparent heat mirror placed on the lamp envelope which transmits a substantial portion of the energy in the visible range produced by the lamp filament and which reflects back to the filament at least about 80%-85% of the ... | 07/10/1979 |
| 4110658 | Electric incandescent lamp An electric incandescent lamp having a rotational axis, includes a filament formed with a coil disposed in bowed form across the axis of the lamp, the length CL of the coil, measured along the mean curvature ML of the coil, being 3.6 to 6.2 times greater ... | 08/29/1978 |
| 4032809 | Tantalum carbide or tantalum-alloy carbide filament mounting and method Coiled incandescible filament which principally comprises tantalum carbide has coiled end portions thereof overfitting relatively thick tantalum carbide members, with the inner surfaces of the overfitting coils welded to the relatively thick members. Elec... | 06/28/1977 |
| 4020383 | Method of pulsing incandescent lamp filaments One or more pulses of electrical energy are applied to the tungsten wire filament of an incandescent lamp in order to improve lamp performance.... | 04/26/1977 |
| 4012659 | Method of flashing tungsten filament The tungsten wire filament of an incandescent lamp is flashed to a recrystallized structure by applying pulses of electrical energy thereto.... | 03/15/1977 |
| 4002884 | Heater element for an indirectly heated cathode A small heater wire winding for a fast warm up indirectly heated cathode includes a spacer wire wound over the heater wire. The main winding and spacer wire are coated with insulation to insure spacing between closely wound turns.... | 01/11/1977 |
| 4001631 | Adjustable length center conductor for termination fixtures for electrodeless lamps A light source includes a source of high frequency power, an electrodelsss lamp and a termination fixture for coupling power to the lamp, the fixture having an outer conductor and an inner conductor whose length is adjustable for providing dynamic matchin... | 01/04/1977 |
| 3943395 | Tubular incandescent lamp having spaced segments In a tubular, double ended electric incandescent lamp in which the filament comprises coiled segments spaced from each other, the filament coiled segments are electrically connected by means of skip space wire sections coiled at each end thereof, which ar... | 03/09/1976 |
| 3942063 | Incandescent lamp having increased life The invention relates to a normal incandescent lamp having a coiled filament throughout its length, whose secondary winding in a turn near the ends of the filament secured to the current supply wires exhibits a larger pitch than the winding of the central... | 03/02/1976 |
| 3937996 | Metal halide lamp using loop electrodes A metal vapor arc lamp having a filling including pyrolitically decomposing metal halides such as thorium iodide uses a loop electrode which allows the heat from the hot spot to flow in two directions. Such electrodes are less expensive to manufacture and... | 02/10/1976 |
