Abstract: A discharge lamp having a pair of electrodes (2) within a light-emitting tube (30) with air-tight seals (31) formed covering a metallic foil (1) is bonded to each electrode (2). To stiffen the metallic foil, it is provided with a length-wise crease (M).

Abstract: An improvement to the current-carrying components of a lamp includes two filaments connected to two different electrodes and one common electrode, and a switch for directing current through the secondary filament upon the failure of the primary filament. Normally, the current flows through the primary filament. The switch in one embodiment is a wire that does not conduct when the primary filament is operational but conducts on the failure of the primary filament to shunt the current to the secondary filament. The wire is an oxide metal wrapped around two of the three electrodes inside the glass envelop of the lamp. When the primary filament fails, the open circuit voltage breaks across the oxide layer to weld the wire to the electrodes and bypass the primary filament.

Abstract: By providing two integrated components, an outer housing and an inner sleeve member, with the inner sleeve member being securely mounted to the outer housing in a manner which prevents its separation from the housing, an efficient, easily manufactured and assembled cable connector is realized. In the preferred embodiment, the inner sleeve member is press fitted into the housing in order to provide the desired secure, integrated affixation of these components. Furthermore, the inner sleeve member is constructed in a generally hollow cylindrical shape with at least two arm members integrally formed therewith, each of which angularly slopes inwardly from the cylindrical wall of the sleeve member, and comprises a distal end portion which is angularly disposed relative to the arm member in at least one direction and preferably in two directions.

Abstract: In order to meet various requirements for discharge tubes for use as light sources, including easiness of production, stability of discharge, long lifetime, etc. without any contradiction between them, a discharge tube of the present invention involves an improvement in the discharge tube for use as a light source constructed to effect arc discharge in a discharge gas atmosphere between a cathode 2, having a cathode tip portion 22 fixed to a lead rod 21, and an anode 3 opposed thereto while keeping the cathode and anode enclosed in the gas. The cathode tip portion has a cusp pointed toward the anode and consists of a refractory metal substrate 221 of an impregnated type or a sintered type containing an electron-emissive material, and a refractory metal coating 222 covering the surface except at the tip portion of the cusp.

Abstract: A double-layer electrode coil for a high intensity discharge (HID) lamp and a method of making the electrode coil are provided. A more stable layer of coils is made by front winding, instead of back winding, the layers of wire. The second layer of wire is entirely within a helical groove on the exterior surface of the first layer of wire. This arrangement is particularly stable and permits more rapid insertion of the electrode shank after removal of the mandrel.

Abstract: A high-voltage discharge lamp has a bulb made of quartz glass, a pair of electrodes and molybdenum foils, wherein the pair of electrodes are arranged so as to oppose each other and are joined to respective ones of the molybdenum foils, and the bulb and molybdenum foils are hermetically sealed at seal portions of the bulb. The joints between the pair of electrodes and the respective molybdenum foils are covered by cylindrical members having slits on an outer surface and/or an inner surface thereof.

Abstract: A discharge lamp comprises a discharge tube having discharge electrodes (10) at both ends thereof. Two lead wires (8) are connected to each of said electrodes (10) that lead to the outside atmosphere from the inside of the discharge tube. The discharge tube contains a fill as an arc discharge generating and sustaining medium. A tungsten coil (14) is connected to at least one lead wire (8) of at least one electrode (10) and placed adjacent to said electrode (10). At least one material selected from the group consisting of calcium carbonate, barium carbonate and strontium carbonate is applied to the inside and the surface of the tungsten coil (14).

Abstract: A high pressure discharge lamp in which the total length of the discharge tube can be shortened without changing the discharge length of the electrodes by the ends of a fused silica glass discharge tube having hermetically sealed portions being bent essentially at right angles relative to a discharge part of the discharge tube so that it has an essentially overall angled shape and by there being electrodes with bent end parts within the discharge tube, the electrodes further having base points that are wound with coils of emissive material, and with these coils projecting partially into the discharge space with the remaining parts of the coils being located within the hermetically sealed portions.

Abstract: A fluorescent lamp includes a glass bulb whose inner surface is coated with a fluorescent substance, a glass bead attached to an end of the glass bulb so as to seal the glass bulb, an exhaust tube provided in the glass bead and sealed, a filament coil arranged in an internal portion of the glass bulb, and an electrode terminal member electrically connected to the filament coil. The glass bead controls a position of the electrode terminal member. The glass bulb preferably contains 5 to 10 wt % of Na2O. The glass bulb, the glass bead and the exhaust tube preferably have a lead-free composition.

Abstract: The invention relates to the fastening of incandescent coil filaments to current lead-in wires in electric lamps. One end (41) of the current lead-in wires is flattened and U-shaped. The U-shaped segment (41) of the current lead-in wire forms a gap-like seat (45) for a coiled incandescent coil-filament end (3a), the gap width of which is smaller than the outside diameter of the incandescent coil-filament end (3a).

Abstract: Fluorescent lighting tubes which incorporate an electronic ballast housed in the sleeves or sockets at each end of the lighting tube. The sockets electrically connect the pins at each end of the fluorescent tube to one another and contain a plurality of electrical contacts. A wiring harness is provided which connects the electrical contacts in one sleeve to electrical contacts in the other sleeve.

Abstract: An image forming apparatus, according to the present invention, comprises a first substrate whereon are provided a functional element and electric wiring that is connected to the functional element, and a second substrate whereon is an area where an image is to be formed, and wherein, with the first substrate and the second substrate being located opposite to each other, space between the first substrate and the second substrate is kept in a pressure-reduced state so as to form an image in the area on the second substrate, and wherein the electric wiring is formed of a laminated conductive material by a process that plates a printed pattern, which is initially deposited by a printing process.

Abstract: The electric lamp has a vacuumtight seal (4) on the longitudinal axis (2) of a glass lamp vessel (1). An internal (12) and an external conductor (13) each have an end (14) inside the seal (4) and extend through a common axial region (5) of the seal (4) in a spaced apart manner. Several metal foils (11) arranged in a flat plane of the seal (4) extend parallel one to the other, in a transversal direction thereof. They have knife-shaped transversal edges (15) and are welded to the internal (12) and the external (13) conductors. The current conductors (10) constituted by the foils (11), the internal (12) and the external (13) conductors are able to conduct rather high currents. The lamp, nevertheless, is of a simple, strong and reliable construction.

Abstract: The discharge vessel has two ends (6), which are closed off by ceramic pl which each contain an elongate capillary tube (12), an electrically conductive lead-through (9, 10) comprising two parts (13, 14) being guided in a vacuum-tight manner through this plug capillary tube (12). The inner part (14) is a pin made of a halide-resistant metal (tungsten), the diameter of which is at most 0.4 mm and which is surrounded by a tubular casing (20, 21) made of ceramic material which consists of a concentric aluminum oxide tube (sleeve), the outer part (13), over its entire length, and the inner part (14), at least over a length of 1 mm from the beginning of the sleeve (20, 21), being sealed off by means of soldering glass (18).

Abstract: There is described an infra-red radiation source comprising an electrically conductive element (2) formed of a plurality of carbon fibres and connection means (3, 4, 5) for connecting the electrically conductive element (2) across an electrical power supply, said connection means (3, 4, 5) including at least one support member (3) formed of carbon and secured to one end of the electrically conductive element (2).

Abstract: A lateral-emitter field emission device has a thin-film emitter cathode 50 which has thickness of not more than several hundred angstroms and has an edge or tip 110 having a small radius of curvature. To form a novel display cell structure, a cathodoluminescent phosphor anode 60 is positioned below the plane of the thin-film lateral-emitter cathode 50, allowing a large portion of the phosphor anode's top surface to emit light in the desired direction. An anode contact layer contacts the phosphor anode 60 from below to form a buried anode contact 90 which does not interfere with light emission. The anode phosphor is precisely spaced apart from the cathode edge or tip and receives electrons emitted by field emission from the edge or tip of the lateral-emitter cathode, when a small bias voltage is applied. The device may be configured as a diode, triode, or tetrode, etc.

Abstract: A single-tube high-watt metal halide lamp being characterized in that its fixture socket installation portions are formed at caps secured to a pair of sealing portions formed at both sides of a discharge tube, and the distance between the fixture socket installation portion and the sealing portion is set at 8.5 mm or less so as to dispose the molybdenum foil of the sealing portion close to a socket of a lighting fixture, whereby the lamp can reduce the temperatures at the ends of the sealing portions and can have a long service life.

Abstract: A fluorescent lamp wherein the replaceable gas discharge bulb assembly is equipped with parallel pins which are formed directly in the bulb assembly. Due to this modular construction, the bulbs can be used in a variety of applications.

Abstract: Inserted into the cap of a high-pressure discharge lamp is a ceramic fleece hich prevents capping cement (17) from passing into the capillary (18) between the supply lead (9a) and pinch (5).

Abstract: A lateral-emitter field emission device has a thin-film emitter cathode 50 which has thickness of not more than several hundred angstroms and has an edge or tip 110 having a small radius of curvature. To form a novel display cell structure, a cathodoluminescent phosphor anode 60 is positioned below the plane of the thin-film lateral-emitter cathode 50, allowing a large portion of the phosphor anode's top surface to emit light in the desired direction. An anode contact layer contacts the phosphor anode 60 from below to form a buried anode contact 90 which does not interfere with light emission. The anode phosphor is precisely spaced apart from the cathode edge or tip and receives electrons emitted by field emission from the edge or tip of the lateral-emitter cathode, when a small bias voltage is applied. The device may be configured as a diode, triode, or tetrode, etc.

Abstract: There is provided a field-emission type cold cathode including (a) a substrate at least a surface of which has electrical conductivity, (b) an insulating layer formed on the substrate, (c) an electrically conductive gate electrode formed on the insulating layer, (d) an almost conical, sharp-pointed emitter electrode disposed in a hole formed through the gate electrode and insulating layer, (e) a focusing electrode formed on the insulating layer so that the focusing electrode is located in the same plane as the gate electrode and surrounds the gate electrode, and (f) a feeder line formed in the same plane as the gate electrode. The feeder line extends from the gate electrode into the focusing electrode and being shaped complementarily with the focusing electrode so that the focusing electrode is present at every radial directions as viewed from a center of the emitter electrode.

Abstract: The invention concerns a high pressure discharge bulb. Such bulbs involve a wo-sided sealed bulb with and without an outer bulb. The bulb is sealed by a pinch on at least one side. It generally has a discharge vessel made of quartz. These bulbs particularly comprise metal halide bulbs, which have a metal halide filling in addition to mercury, but they also include mercury high pressure discharge bulbs or xenon high pressure discharge bulbs. The bulbs are used preferably for optical systems, particularly larly for photo-optical purposes, for example, in head-lights, overhead projectors, and decorative lighting devices. They particularly find application in lighting systems for the stage, film and television. Typical lamp powers are 400 to 2000 W. A discharge lamp pinched on each end has pinches in which the ratio of the total width of each wide side is smaller than or equal to 2.2 times the thickness of the wide side. Tube pieces carrying the base sleeves are formed on the outer ends of the pinches.

Abstract: 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 alongside the discharge vessel to connect a second current supply conductor (5) extending from a second neck shaped portion (3) to a second contact member (36) of the cap. The lamp vessel (1') is contained by a tubular outer envelope (20), which is filled with air and does not envelope the connection conductor (7). The outer envelope (20, 50) has a narrowing portion (21, 52, 51) which encloses the second current supply conductor (5) or a neck shaped portion (2, 3). The outer envelope is maintained. The lamp is of a simple construction which allows for optimizing the light output or the temperature of the lamp vessel.

Abstract: A fluorescent lamp is disclosed containing a deposit of a dried metal hydride-containing paste. The dried metal hydride-containing paste has a decomposition temperature higher than the temperature present during normal lamp operation. At the end of the lamp life, an increase in lamp temperature decomposes the metal hydride-containing paste and releases hydrogen within the lamp. The presence of hydrogen causes the lamp to extinguish passively without significant end heating or glass cracking.

Abstract: 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 conductors extend outside the lamp vessel and have a skin of molybdenum nitride as a protection against oxidation.

Abstract: 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 least one end of the discharge lamp vessel and connected to one of the electrodes, a wire frame slidably inserted into the sleeve, and a buffer coil, one end of which is connected with the wire frame and the other end of which is housed inside the sleeve, elastically supporting the discharge lamp vessel.

Abstract: An improved high-frequency field-emission microelectronic device (10) has a substrate (20) and an ultra-thin emitter electrode (30) extending parallel to the substrate and having an electron-emitting lateral edge (110) facing an anode (40) across an emitter-to-anode gap (120). A control electrode (70), having a lateral dimension only a minor fraction of the emitter-to-anode gap width, is disposed parallel to the emitter and spaced apart from the emitter by an insulator (60) of predetermined thickness. A vertical dimension of the control electrode is only a minor fraction of the height of the anode. The control electrode may substantially surround a portion of the anode, spaced from the anode in concentric relationship.

Abstract: 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 alloy that has substantially the same thermal expansion coefficient as the glass base. The contact pins are embedded and sealed to the glass base in a gas-tight manner, with a glass-to-metal seal. The contact pins extend below the base to provide external connections of the lamp to a power source. The pins also extend into the interior of the lamp, and provide electrical contact to a filament which is mounted between them. A filament support wire is anchored in the glass base at one end thereof and has a loop at its other end in which the mid-section of the filament rests and is mechanically supported.

Abstract: A lateral-emitter field emission device has a thin-film emitter cathode 50 which has thickness of not more than several hundred angstroms and has an edge or tip 110 having a small radius of curvature. To form a novel display cell structure, a cathodoluminescent phosphor anode 60 is positioned below the plane of the thin-film lateral-emitter cathode 50, allowing a large portion of the phosphor anode's top surface to emit light in the desired direction. An anode contact layer contacts the phosphor anode 60 from below to form a buried anode contact 90 which does not interfere with light emission. The anode phosphor is precisely spaced apart from the cathode edge or tip and receives electrons emitted by field emission from the edge or tip of the lateral-emitter cathode, when a small bias voltage is applied. The device may be configured as a diode, triode, or tetrode, etc.

Abstract: A fluorescent lamp comprises a glass tube, an electrode at each end of the tube, each of the electrodes including a pair of lead wires extending through each sealed end of the tube and joined to a coil, and a capsule containing metal hydride disposed in the tube and having a decomposition temperature higher than temperatures within the tube during normal operation of the lamp.

Abstract: In a field emission type cathode structure for a CRT, a grid electrode has an opening at a position corresponding to a position of a bonding wire for connecting a gate electrode to a lead connected to a power supply for a gate voltage. A bonding tool moves vertically through the opening of the grid electrode to bond the bonding wire on the gate electrode and the lead.

Abstract: The subject invention relates to a copper-steel composite wire suitable for use as inner lead wires in lamp applications. The subject copper-steel composite wire comprises a steel core having a thick copper cladding on the outside thereof such that the composite lead wire exhibits at least 30% IACS electrical conductivity. The application further relates to the use of the subject composite wire in incandescent lamp applications.

Abstract: The present invention is directed to an addressable electroluminescent display which eliminates ghost images resulting from leads used to energize the display. The addressable display has a polymer film substrate with a first electrode deposited onto the polymer film. A group electrode is provided which is spaced apart from the first electrode. The group electrode has segments so arranged that, when projected onto the first electrode, form a substantially continuous group electrode footprint. A phosphor layer is interposed between the first electrode and the group electrode. Preferably, a dielectric is also interposed between the phosphor layer and the group electrode. A group electrode insulating layer overlies the group electrode and has group electrode insulating layer passages therethrough. Group electrode leads overlay the group electrode insulating layer and are positioned such that their projection onto the first electrode lies within the group electrode footprint.

Abstract: A transparent electrode, luminescent layer, back electrode are formed on one side of a first insulative substrate. A second insulative substrate is adhered to the first insulative substrate by an insulative adhesive. The back electrode is divided into two sub-electrodes. A pair of electrode pads are formed on the second insulative substrate so as to be opposed to at least respective parts of the sub-electrodes, and connected to those parts of the sub-electrodes by a conductive connector.

Abstract: 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 rods (6), and have a circumferential coating (7) of quartz glass at least adjacent the metal foil. The coating has a firm adherence to the rod. It may comprise in its boundary (7') adjoining the rod/coating interface an addition, e.g. selected from a group comprising thorium, yttrium, hafnium. Alternatively, rhenium may be present at the surface of the rod, giving an interlocking configuration of the rod and its coating. Due to a strong adherence of the quartz glass to the rod upon completing a seal, and due to large differences in expansion coefficients, the coating is torn off from the wall so as to be mechanically loose from the wall. The coating prevents premature failure of the lamp caused by leakage.

Abstract: The invention relates to a high-pressure sodium discharge lamp provided with a discharge vessel (3) with a ceramic wall (3a) of aluminum oxide in which at least Na as an ionizable filling component, a rare gas and Al (20) are present. According to the invention, the Al is provided near the wall of the discharge vessel in a location which reaches a temperature of at least 1000 K in the operational condition of the lamp.

Abstract: 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 ) which is provided with a filling containing a metal halide. The discharge vessel (10) has a central zone (20) between the electrodes (40a, 40b) and a first and a second cylindrical end zone (30a, 30b) which each surround a current supply conductor (50a, 50b) connected to a respective electrode (40a, 40b). At least the first end zone (30a) has a diameter smaller than the smallest diameter of the central zone (20). The current supply conductor (50a) through the first end zone (30a) has a halide resistant portion (51a) which faces the discharge space (11) and a portion (52a) permeable to hydrogen and oxygen and facing away from the discharge space (11).

Abstract: 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 (Si.sub.3 N.sub.4). Tungsten-halogen lamps having molybdenum outer leads coated with silicon nitride have operated for over 1500 hours at about 450.degree. C. without oxidation failure of the leads.

Abstract: A base for a position-dependent lamp comprises an inner shell, an outer shell, an aperture in said outer shell, and a hollow pin projecting from said aperture, said pin having a substantially tubular body with a pair of oppositely disposed wings extending from an end thereof, said wings having a length about two and one half to three times the height of said body and being sandwiched between said inner shell and said outer shell. The extended wings add stability to the pin and eliminate the use of lead-based solder in the lamp manufacture.

Abstract: A novel cigarette is described which has a greater number of puffs, at least about 2 more, preferably at least about 4 more and more preferably at least about 6 more, than a conventional cigarette of same dimensions and length of tobacco rod. The cigarettes may be partially smoked, extinguished, stored and then resmoked. The greater-than-normal number of puffs may be achieved by employing a slower burning tobacco blend, a lower draw resistance tobacco, a greater tobacco density and/or a burn rate retardant wrapper.

Abstract: A large area multi-channel flat fluorescent lamp with improved efficiency consists of two groups of closed hollow electrodes which are printed on the inner surfaces of the opposing ends of two flat glass substrates. The substrates are sealed together and have wave-guiding spacers which protect the lamp from implosion and also maintain a fixed spacing between the two substrates. A dielectric reflective layer is coated on the inner side of one of the substrates with an over-coat of phosphor, and the inner opposing surface of the other substrate is coated with only the phosphor. The space between the substrates is first evacuated and then filled with an inert gas and mercury vapor. The multi-channel closed hollow electrode structure with wave-guiding spacers, in combination with a reflective dielectric layer produces greater brightness with better brightness uniformity over a large area. In addition, the large area multi-channel flat fluorescent lamp maintains high efficiency and has a long life.

Abstract: An ultraviolet radiation starting source for an arc discharge lamp includes a sealed envelope with a press seal, a gaseous fill material within the envelope, a molybdenum ribbon which extends from the press seal into the interior region of the envelope and a wire inlead for carrying electrical energy to the ribbon. A method of manufacture is described in which fill material flows through a tube. A press seal is formed at one end of the tube, the interior of the tube is pumped to a desired pressure and another press seal is formed at the second end of the tube to create a sealed envelope.

Abstract: In a discharge lamp unit in which a discharge lamp (10), which is formed by pinch-sealing (13a, 13b) a glass tube in such a manner as to define a closed glass ball (12) forming an electric discharge region substantially at the middle of the ball and in which discharge electrodes (15a, 15b) are arranged confronted with each other, is supported at both ends by metal supports (30, 40) which are welded to a short lead support (22) and a long lead support (24) protruding from an insulating base (20) in such a manner that the lead supports (22, 24) are parallel to one another with a predetermined distance therebetween and are parallel to the discharge axis of the lamp. The metal support (30) which supports the rear end portion of the discharge lamp has a discharge lamp holding portion (34) which is arcuate, and the part (14) of the rear end portion of the discharge lamp which is held by the discharge lamp holding portion of the metal support is circular in cross section.

Abstract: A tubular electric lamp has lamp bases each consisting of an electrically insulative sleeve and conductive contact mounted therein. The sleeve has a first abutment which buts against the seal, a second abutment against which the conductive contact is seated, and an access port located axially between the first and second abutments. With the contact seated against the second abutment and the sleeve mounted over the current conductor and butted against the seal, the current conductor and a projection of the conductive contact extend axially past the access port. The conductive contact is welded and/or crimped to the conductive contact through the access port with the contact seated against the second abutment and the first abutment butted against the seal, fixing the sleeve between the contact and the seal.

Abstract: The electric lamp has a quartz glass lamp vessel having tungsten current supply conductors extending through the wall of the lamp vessel to an electric element arranged in the lamp vessel. The current supply conductors have a continuous coating of quartz glass where they extend through the envelope wall from the interior to the exterior of the lamp vessel. The coating forms with the current supply conductor a glass/metal interface forming a gas-tight seal. The glass of the coating adjoining the interface contains thorium, hafnium, chromium, aluminum, titanium, tantalum, magnesium, calcium, strontium, barium, zirconium, lanthanum, scandium, lanthanides, niobium, boron and yttrium. The coating has a very strong adhesion to the metal and; the lamp vessel at the gas-tight seal has a great strength.

Abstract: The service life of a bottom electrode for a direct current arc furnace for producing steel is prolonged by using ZrB.sub.2 type sintered bodies for a contacting pins which constitutes a major part of the bottom electrode wherein the ZrB.sub.2 type sintered bodies have a corrosion-resistance to molten steel and slag. Further, the number of contacting pins to be used is reduced by forming each of the pins into a form of pillar with a through hole at the axis, or by assembling a plurality of longitudinally divided pin portions to form a contacting pin, whereby the diameter of the contacting pin can be made large. Then the space between contacting pins is made broad, and brick having good corrosion-resistance are filled in the space so that the service life of the bottom electrode is brought closer to that of the refractory lining of the direct current arc furnace.

Abstract: A miniature surface mount style lamp is disclosed which can be assembled relatively quickly, easily and inexpensively. A pair of closed metal end caps are conductively adhered to the opposed ends of a bulb envelope having a pair of exposed filament leads protruding from either end. In some embodiments, the filament leads are in physical contact with the end caps. In other embodiments, the electrical connection between the end caps and the filament leads is provided only by the conductive adhesive.

Abstract: Anode and cathode means are provided for a metal halide lamp which cooperate in providing more rapid light output during lamp start-up. A xenon-metal halide lamp employing the improved discharge electrode means is disclosed along with an automotive headlamp having this lamp for its light source.

Abstract: The electric lamp has a quartz glass lamp vessel (1) with molybdenum current supply conductors (3) extending to an electric element (2) arranged in the lamp vesel (1). The current supply conductors (3) have a continuous coating (4) of quartz glass which is fused to the lamp vessel (1). The coating (4) forms with the current supply conductor (3) a glass/metal interface (5). The glass of the coating (4) adjoining the interface (5) contains thorium, hafnium, chromium, aluminum, titanium, tantalum, magnesium, calcium, strontium, barium, zirconium, lanthanum, scandium, a lanthanide, niobium, boron or yttrium. The coating (4) has a very strong adhesion to the metal; the lamp vessel (1) has a great strength.

Abstract: A light-emitting diode lamp comprises a cathode wire having a cup lined with a metal foil formed in its head end, an anode wire parallel to the cathode wire and having a flattened head end lined with a metal foil, a light-emitting diode seated in the cup and connected to the anode with a thin connecting wire, the entire assembly being potted in a transparent material. A leadframe for assembly of LED lamps comprises a pair of elongated strips and a plurality of wire pairs attached to the strips, each wire pair having an anode wire having a layer of metal foil welded to its head end and a cathode wire having a metal foil-lined cup in its head end. A method for preparing wires for leadframe assembly is also described.