Abstract: An electrodeless inductively-coupled fluorescent lamp which operates at ro frequency comprising a bulbous envelope (1) filled with rare gas and metal vapor. A reentrant cavity (4) and an induction coil (6) are disposed in the cavity (4). The inner walls of the envelope (1) and the cavity (4) have a protective coating (3) and a phosphor coating (2). A metal Faraday cylinder (12) welded to the lamp base (13) is disposed between the cavity (4) and the coil (6) to reduce capacitive RF voltage between the coil and the plasma to improve lamp maintenance and remove heat. A tubulation (16) is disposed on the lamp axis to evacuate the envelope (1). The proximal end of the tubulation (16) has an expansion (20) with the volume (23) where the initial capacitive discharge is ignited.

Abstract: Manufacture of a substantially flat compact fluorescent lamp using a molded cup-like continuous concentric (spiralled) channel and a circular plate, resembling a lid for the cup. The cup with the channel is coated with a light reflective layer followed by a phosphor layer (whereas the lid, on one side, is coated with the phosphor layer only) and has two holes through which two electrodes are sealed such that one of the said holes has, in addition to the electrode, an integral exhaust tubulation. The space between the cup and the lid is filled with a material capable of emitting ultraviolet under electrical excitation. Electrical discharge created between the electrodes, strictly follows the path of the channel physically imposed by the sealed structure, in spite of a nonsealed contact of the top surface of the channel walls and the plane surface of the lid. On absorption of the ultra-violet from the discharge, the phosphor emits visible radiation.

Abstract: A flat compact fluorescent lamp is disclosed. The lamp contains a fill of mercury and inert gas. The lamp includes a glass front panel (1) having an inner surface and a glass bottom panel (2) also having an inner surface. A convoluted glass partition (3) having an eccentric spiral shape and smooth bends is disposed between the inner surfaces of the front and bottom panels and with the bottom panel (2) defines a channel (4) in the lamp. The channel (4) has a fairly uniform width. A phosphor coating (6) of a predetermined density between about 3 and 5 mg./cm.sup.2 is disposed on the inner surface of the channel (4) and a phosphor coating (8) of a predetermined density of between about 0.5 and 1.5 mg./cm.sup.2 is disposed on the inner surface of the front panel (1). Two electrodes (14a & 14b) are disposed at opposite ends of the spiral in the lamp to form an arc which emits UV light to excite the phosphor (6 & 8) to emit light.

Abstract: An electrodeless fluorescent lamp containing a fill of a rare gas and mercury and a flag (14) disposed therein at a predetermined location in the lamp for increasing the rate of luminous development in the lamp. The flag (14) includes a pair of spaced-apart metallic foil sections (31) and a metallic mesh substrate (30) disposed between the foil sections (31) whereby to be shielded from ion bombardment of the discharge. A coating (30a) of indium which is adapted to amalgamate with the mercury is disposed on the mesh (30). The sections are joined together by spot-welding (32) to enable migration of mercury into and out of the space between the sections thereby enable the atoms to form an amalgam with the indium and be rapidly released therefrom.

Abstract: A narrow band light source is combined with a narrow band filter on the face of a traffic light to reduce the problem of sun glare reflected from one traffic light, reducing intensity of the sunlight glare while light from the narrow band source passes through the filter essentially unattenuated, allowing system efficiency to remain high.

Abstract: Low pressure sodium lamp color output is shifted from yellow to a fuller spectral range of visible light (white) by effective simultaneous excitation of sodium and a mercury additive. This is made possible principally by controlling the vapor constituents and the excitation arrangement.

Abstract: An electrodeless fluorescent lamp and fixture is disclosed which operates radio frequencies and contains a metallic cylinder 9 to suppress capacitive coupling between an induction coil 7 and a plasma in the envelope 1 of the lamp and simultaneously substantially reduce heat in a reentrant cavity 5. The lamp includes a bulbous envelope 1 having a conventional phosphor layer 3 disposed therein. The bulbous envelope 1 contains a suitable ionizable gaseous fill. Upon ionization of the gaseous fill, the phosphor is stimulated to emit visible radiation upon absorption of ultraviolet radiation. The reentrant cavity 5 of the bulbous envelope 1 contains an inducation coil. The cylinder 9 transfers heat from the plasma to the fixture 11 through a base 13, 13a on the envelope 1.

Abstract: A fluorescent lamp (2) having at least two phosphor coatings (12) on the surface of the sealed lamp bulb, typically an inner surface. There is variable driving means which preferentially activates one phosphor and not the other phosphors, at one arrangement or setting or configuration of the driving means, while at another setting the driving means activates in addition a different or several different phosphors. Each phosphors may be a blend of phosphors and the phosphors and/or blends may be overcoated upon one another forming multiple layers or all mixed together and applied as a one layer coating on the lamp surface.

Abstract: A compact fluorescent lamp has a pair of fluorescent arc tubes (16, 18) dosed within a spherical bulbous, translucent envelope (24). The arc tubes (16, 18) are substantially U-shaped and are oriented such that one leg of the U-shape of an arc tube extends between the legs of the other arc tube. The arc tubes (16, 18) are connected to a single ballast to provide power to the lamp.

Abstract: An elongated arc tube is folded into multiple parallel legs in a close packed peripheral array about a long, thin ballast housing, the combination constituting a retrofittable incandescent bulb replacement compact flourescent having a shorter overall length and a more uniform spatial light distribution.

Abstract: Electrodeless, low pressure, fluorescent discharge lamp of high aspect ratio, with a substantially flat spiral rf coil adjacent a back face (and insulated therefrom), that emits light through a front surface or selected portions under control of internal reflective and phosphor coatings placement to afford minimum resonance trapping, high efficiency and uniform illumination of high specific intensity over a selected area of the front wall.

Abstract: The present invention provides a base socket that fits into incandescent fixtures and allows one or many "stick" type compact fluorescent lamps to be inserted. The fixture allows the user to insert as many CFL's as desired without changing or rearranging, in any way, the ballast. The ballast circuitry is designed for series or parallel electrical connections of the CFL's. When in series each socket has a bypassing microswitch that provides for electrical circuit continuity.

Abstract: A negative glow discharge lamp having improved efficacy enabled by reducing the anode work function by the introduction of a metal-based gas into the lamp envelope for absorption on the anode. The metal-based gas is preferably cesium but may also, for example, be sodium.

Abstract: A negative glow discharge lamp having improved efficacy enabled by reducing the anode work function by the introduction of a metal-based gas into the lamp envelope for absorption on the anode. The metal-based gas is preferably cesium but may also, for example, be sodium.

Abstract: A negative glow discharge lamp having improved efficacy enabled by reducing the anode work function by the introduction of a metal-based gas into the lamp envelope for absorption on the anode. The metal-based gas is preferably cesium but may also, for example, be sodium.

Abstract: A glow discharge lamp includes a sealed lamp envelope containing a noble gas and mercury, a cathode and an anode disposed in the lamp envelope and an incandescent filament for emitting visible light for illumination immediately upon application of power and for emitting little or no visible light after a glow discharge is formed between the cathode and the anode. The filament, the cathode and the anode are electrically connected in series. The lamp envelope typically includes a phosphor coating for emission of visible light upon absorption of ultraviolet radiation from the glow discharge. An optional switch can be used for disconnecting the filament during steady state operation of the glow discharge lamp.

Abstract: A glow discharge lamp includes a light-transmitting envelope containing a rare gas fill material. The envelope contains a spherical-shaped region having a predetermined internal radius R. A phosphor coating is disposed on the inner surface of the envelope. Anode and cathode electrodes are disposed within the envelope and spaced a predetermined distance d thereapart. The voltage drop of the cathode electrode is less than the excitation potential of the rare gas fill material. The anode electrode has a predetermined effective surface area S.sub.a such that the relationship Rd/S.sub.a is within the range of from about 5.0 to 11.0.

Abstract: A method of yielding selectively a desired enrichment in a specific isotope including the steps of inputting into a spinning chamber a gas from which a scavenger, radiating the gas with a wave length or frequency characteristic of the absorption of a particular isotope of the atomic or molecular gas, thereby inducing a photochemical reaction between the scavenger, and collecting the specific isotope-containing chemical by using a recombination surface or by a scooping apparatus.

Abstract: A glow discharge lamp that includes a light transmitting envelope containing a noble gas fill material and a pair of electrodes disposed in the envelope. Lead-in wires coupled to the electrodes and extend to and are hermetically sealed in the envelope The electrodes are disposed in oppositely spaced positions in the envelope preferably upper and lower positions with the electrodes positioned outside of the bulbous region of the envelope to thereby retard the formation of deposits at the main bulbous region of the envelope.

Abstract: A method of yielding selectively a desired enrichment in a specific isotope including the steps of inputting into a spinning chamber a gas from which the specific isotope is to be isolated, radiating the gas with frequencies characteristic of the absorption of a particular isotope of the atomic or molecular gas, thereby inducing a photoionization reaction of the desired isotope, and collecting the specific isotope ion by suitable ion collection means.