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5754005 |
Electric lamps containing electrical leads of a molybdenum and tungsten alloy
An inlead for an electric lamp formed of an alloy of tungsten and molybdenum. The inlead has a rate of thermal expansion or contraction approximating that of the glass forming the bulb. This...
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5742123 |
Sealing structure for light-emitting bulb assembly and method of manufacturing same
A sealing structure for a light-emitting bulb assembly includes a closure, having a core which serves as an electrode for sealing an open end of a bulb. The closure includes a bulb-side region...
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5736811 |
Capped high-pressure discharge lamp
The capped high pressure discharge lamp includes a light source (1) having a lamp vessel (1') with a first neck shaped portion (2) to which a lamp cap (30) is fixed. A connection conductor (7) runs...
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5729089 |
Electrode assembly for high pressure sodium lamp and method of making same
Variable backspace in electrode assemblies for high pressure sodium lamps is achieved by employing a hollow electrode base which has one end formed to frictionally engage an electrode, which...
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5723951 |
Method of hot restarting a high intensity discharge lamp
An apparatus and method for operating an arc discharge lamp which can be hot restarted is described. The method involves providing low microwave power after the lamp ballast is disconnected from...
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5698946 |
Electric lamp having a protective skin on end portions of the current conductors
The electric lamp (1) has a lamp vessel (2), wherein an electric element (3) is accommodated. This element is connected to current conductors (4). Molybdenum end portions (5) of the current...
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5698947 |
High pressure sodium lamp
A high pressure sodium lamp is provided. The high pressure sodium lamp includes a discharge lamp vessel to the ends of which a pair of electrodes are respectively connected, a sleeve coupled to at...
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5663607 |
Discharge lamp lead support
A discharge lamp having an emission part with a roughly spherical external shape and tube arms extending from opposite sides of the emission part, hermetically sealing parts formed on an end of...
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5659222 |
Vacuum sealed incandescent lamp with improved filament support structure
A subminiature incandescent lamp has a substantially cylindrical base to which a glass envelope enclosing the interior of the lamp is sealed. A pair of contact wires or pins are made of a metal...
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5654608 |
Capped electric lamp
The capped electric lamp has a glass lamp vessel (1) having first and second neck-shaped portions (2,3). An outer glass envelope (8) has a narrowed portion (9) where it is coupled to the first...
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5654606 |
Low-pressure discharge lamp having metal and ceramic electrodes
A low-pressure discharge lamp according to the invention is provided with a radiation-transmitting discharge vessel which encloses a discharge space containing an ionizable filling in a gastight...
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5646487 |
Lighting device for gas discharge tube with insulated discharge shielding member
The present invention is to provide a gas discharge tube which is properly lighted to improve the reproducibility of a satisfactory light emission state. The gas discharge tube includes an envelop...
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5637960 |
Ceramic discharge vessel for a high-pressure discharge lamp, having a filling bore sealed with a plug, and method of its manufacture
To provide a tight seal for a fill bore in the wall or an end plug of a dharge vessel for high-pressure discharge lamps, a fill bore is provided either through the wall--in the region of the...
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5633563 |
Gas discharge tube with discharge shielding member
A gas discharge tube includes a light-emitting section in an envelope sealing a gas therein, positioned at distal ends of lead pins while spaced from an inner side wall of the envelope. The...
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5614787 |
Metal halide lamp having heat dam portion
A metal halide lamp comprises a sealed tube containing mercury vapor and halide, and electrodes extending to a center of the sealed tube, supported by sealed portions at both ends of the sealed...
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5598063 |
Means for supporting and sealing the lead structure of a lamp
This lamp comprises an envelope of vitreous light-transmitting material enclosing an internal space, light-generating means within said space, and conductive lead structure projecting into said...
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5592049 |
High pressure discharge lamp including directly sintered feedthrough
A high pressure discharge lamp having an extended life includes a discharge vessel 8, and a feedthrough 10 extending through a plug 11. A directly sintered connection is formed between the...
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5576598 |
Lamp with glass sleeve and method of making same
A lamp has a light transmissive glass envelope which includes a light source chamber. At least one glass extension is affixed to the light source chamber and has a sealing area surrounding a...
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5569978 |
Flash lamp with O-ring electrode seals
An arc lamp comprises an electrode assembly with O-ring seals that seal in xenon gas within a glass tube envelope and shaped electrode that, together with a contoured tube geometry inside the glass...
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5565734 |
Electric incandescent lamp having filament sleeves engaged by envelope constrictions supporting the filament
The electric incandescent lamp has a filament (2) centrically supported in a tubular envelope (1) by constrictions (6) in the envelope at areas where a refractory metal member (7) short-circuits...
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5565735 |
Unsaturated vapor pressure type high pressure sodium lamp
In an unsaturated vapor pressure type high sodium lamp, a glass solder used for closely sealing a cap to fix to an arc tube includes a first component which is a mixture of Al 2 O 3 , CaO and Y 2 ...
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5557169 |
Electric lamp with high and low melting point current supply conductor
An electric lamp includes a lamp vessel sealed in a gastight manner and having a wall of ceramic material. A current supply conductor is connected to an electric element arranged in the lamp vessel...
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5552670 |
Method of making a vacuum-tight seal between a ceramic and a metal part, sealed structure, and discharge lamp having the seal
A vacuum-tight seal, particularly for an arc tube or discharge vessel for a metal halide or sodium high-pressure discharge lamp, is made by forming the arc tube of transparent ceramic, typically Al...
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5542867 |
Process for connection of a molybdenum foil to a molybdenum lead portion and method of producing a hermetically enclosed part of a lamp using the process
A process for connecting a molybdenum foil to a lead portion with sufficient strength and reliability in which an expensive binder, such as platinum, platinum clad molybdenum, or the like, is not...
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5532552 |
Metal-halide discharge lamp with ceramic discharge vessel, and method of its manufacture
To provide an effective seal for a metal-halide discharge lamp having a ceramic discharge vessel (4), the seal is formed in multiple parts, in which a first part, adjacent the interior or discharge...
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5528101 |
Single-ended low-power discharge lamp, and method of its manufacture
The discharge or arc tube chamber of a low-power high-pressure discharge lamp is, in one single step, sealed and shaped by mold or form-blowing by using pinch or press jaws (30, 31) which have...
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5528106 |
Electric lamp with H-shaped pinched seal
The electric lamp has a lamp vessel (1) provided with a pinch seal (4) which is H-shaped in cross sections. Metal foils (6), to which inner (8) and outer conductors (7) are connected to constitute...
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5519284 |
Short pumping stem for flat display screens
A short pumping stem for flat display screens, more particularly for microtip flat display screens, generally adaptable to flat display screens constituted by a vacuum chamber, includes, before...
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5491374 |
Double-based low-pressure discharge lamp with misalignment-tolerant bases
To ensure contact of axially bent-back current supply leads, extending over plate-like base terminals of an elongated fluorescent lamp, and ensure electrical connection between the bent-over or...
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5461277 |
High-pressure gas discharge lamp having a seal with a cylindrical crack about the electrode rod
A high pressure discharge lamp includes a sealed lamp vessel (1) having a quartz glass wall (2) enclosing a discharge space (3). Metal foils (4) are embedded in the wall, connected to electrode...
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5455480 |
High-pressure discharge lamp with ceramic discharge vessel and ceramic sealing means having lead-through comprising thin wires having a thermal coefficient of expansion substantially less than that of the ceramic sealing means
To provide a sealed through arrangement for electrical leads through a ceramic end plug, suitable for discharge lamps of between about 50 to 250 W power rating, the lead-through (9) is made of a...
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5446341 |
High-pressure electric discharge lamp with tight lead-through pin electrode connection and method of its manufacture
To provide a tight seal between an essentially solid niobium or tantalum necting pin or rod (10) passing through an opening (7, 28) in an end plug (11) closing off a high-pressure discharge lamp...
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5430353 |
Lamp inlead assembly having a formed foil arrangement
A lamp inlead assembly for a light source having a lamp envelope with at least one end region in which the lamp inlead assembly is sealably disposed includes and outer lead wire member to which...
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5424608 |
High-pressure discharge lamp with ceramic discharge vessel
To protect a niobium tube (9) forming a current supply lead through a thrh-opening (14) in an end plug (10) in a ceramic discharge vessel against attack by halides or condensed sodium, the...
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5424609 |
High-pressure discharge lamp
A high-pressure discharge lamp of the invention includes a ceramic discharge vessel (10) in which a first and a second electrode (40a, 40b) are arranged and which encloses a discharge space (11 )...
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5408157 |
Dual arc tube discharge lamp having a lamp frame with coplanar spot welds and slip-free construction
A high pressure discharge lamp includes a pair of arc tubes connected electrically in parallel within an outer envelope, which includes a lamp stem having a pair of stem conductors entering the...
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5404077 |
High-pressure discharge lamp
A high-pressure discharge lamp with a ceramic discharge vessel (8) compri a tubular current feedthrough (10) of a metal whose thermal coefficient of expansion is smaller than that of the ceramics....
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5404078 |
High-pressure discharge lamp and method of manufacture
A high pressure discharge lamp has a ceramic discharge vessel (8), whose s are closed with plugs (11). The metallic feedthrough, or a main part of it, has a thermal coefficient of expansion which...
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5402038 |
Method for reducing molybdenum oxidation in lamps
Electric lamps having molybdenum metal parts exposed to an oxidizing environment can withstand exposure to higher operating temperature if the molybdenum metal parts are coated with silicon nitride...
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5391523 |
Electric lamp with lead free glass
An electric lamp having a light source, glass envelope made of a lead free glass, electric leads, and contacts, is disclosed. The compositional range of the envelope glass may be used in existing...
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5387840 |
Electric lamp having current conductors with a metal phosphide coating only on exposed portions thereof
The electric lamp has a glass lamp vessel in the wall of which current conductors of molybdenum or tungsten are accommodated, which extend to the outside. Exclusively where the current conductors...
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5387839 |
Electrode-inlead assembly for electrical lamps
The invention relates to an electrode-inlead assembly for electrical lamps which comprises a lead-in-wire connected to a foil made of refractory metal and the foil is connected to a shank made of...
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5369329 |
Short arc lamp electrode rod supports
The present invention involves a short arc discharge lamp having a quartz envelope with a bulb and a plurality of arms having a specified cross-section, and wherein one or more electrode rods are...
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5352953 |
Gas-filled discharge tube
A gas-filled discharge tube includes a tubular body formed of an electrically insulating material, and has engaging portions respectively at opposite ends thereof. A pair of electrode bases are...
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5343117 |
Electrode feedthrough connection strap for arc discharge lamp
An electrode feedthrough assembly for a ceramic arc tube of the type used in high pressure sodium arc lamps. The electrode feedthrough assembly is particularly useful in an external reservoir arc...
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5321335 |
Alumina, calcia, yttria sealing composition
The invention relates to a sealing composition suitable for bonding yttria or alumina ceramic members, or bonding refractory metals to the ceramics. The sealing composition has, in mole percent,...
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5310374 |
Electric lamp with foil seal construction and method of producing the same
The temperature in the sealed region of an electric lamp with a foil seal arrangement rises when the lamp is illuminated and the foil will oxidize due to the oxygen contained in the air if...
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5304892 |
Double-ended high-pressure discharge lamp
To permit high lamp currents to be applied to lamp electrodes (5, 6) of a discharge vessel (2) from which two elongated necks (3, 4) extend via current supply leads (23, 35), the discharge vessel...
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5299110 |
Fluorescent lamp assembly
An improved fluorescent lamp is provided with two conductive poles formed at two ends of the lamp. Each conductive pole is contained in a the the lamp tube and includes a a extending contact pin...
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5287037 |
Metal ferrules for hermetically sealing electric lamps
Electric lamps made using nickel-plated, high nickel content iron alloy ferrules wherein the ferrules have been heated above their surface oxidation temperature and then reduced during the...
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