摘要:
Compact fluorescent lamps employ metal arc directors formed from suitable material, such as steel. The steel parts are vacuum fired to degas same prior to assembly in the lamps.
摘要:
Compact fluorescent lamps employ metal arc directors formed from suitable material, such as steel. The steel parts are vacuum fired to degas same prior to assembly in the lamps.
摘要:
A compact fluorescent lamp comprises multiple, individual tubes mechanically formed into an assembly and inserted into an outer envelope. Only the outer envelope is hermetically sealed and includes an atmosphere of mercury and argon. Novel arc directing means connect the tubes to form a continuous arc path.
摘要:
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.
摘要:
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.
摘要:
Glass encapsulated, metal arc directors for compact fluorescent lamps. The metal parts are coated with an aqueous suspension of glass frit and fired to form the glass coating. Such parts reduce discharge contamination by reducing the outgassing of the metal parts.
摘要:
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.
摘要:
An arc discharge metal halide lamp for providing visible light comprising an arc discharge vessel which has capillary tubes therein in at least one of which there is a first electrical feedthrough extending through an interior passageway to have an interior end of that electrode positioned in the discharge region opposite the other the interior passageway of the other capillary and an exterior end thereof positioned outside the outer end of that capillary tube but joined to a cermet portion inside that tube. In an intermediate stage of fabricating the lamp, a bonding material ring of limited diameter is provided at the end of the capillary tube about the exterior end. In a completed lamp, the first electrical feedthrough has limited extent joints where its components are joined and, alternatively or in addition, has a limited offset between its components at a joint between them.
摘要:
An arc discharge metal halide lamp for providing visible light comprising an arc discharge vessel which has capillary tubes therein in at least one of which there is a first electrical feedthrough extending through an interior passageway to have an interior end of that electrode positioned in the discharge region opposite the other the interior passageway of the other capillary and an exterior end thereof positioned outside the outer end of that capillary tube but joined to a cermet portion inside that tube. In an intermediate stage of fabricating the lamp, a bonding material ring of limited diameter is provided at the end of the capillary tube about the exterior end. In a completed lamp, the first electrical feedthrough has limited extent joints where its components are joined and, alternatively or in addition, has a limited offset between its components at a joint between them.
摘要:
An electrodeless lamp includes a bulbous lamp envelope enclosing an inert gas and a vaporizable metal fill, the lamp envelope having a reentrant cavity and an envelope bottom, an electromagnetic coupler positioned within the reentrant cavity, and a thermal shield positioned in proximity to the envelope bottom and configured to increase the temperature of the envelope bottom. By increasing the temperature of the envelope bottom, a cold spot is prevented. As a result, light output at low temperatures is comparable to light output at room temperature.