US3609437A - Electric discharge lamp comprising container of densely sintered aluminum oxide - Google Patents

Electric discharge lamp comprising container of densely sintered aluminum oxide Download PDF

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Publication number
US3609437A
US3609437A US711763A US3609437DA US3609437A US 3609437 A US3609437 A US 3609437A US 711763 A US711763 A US 711763A US 3609437D A US3609437D A US 3609437DA US 3609437 A US3609437 A US 3609437A
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Prior art keywords
discharge lamp
envelope
current lead
aluminum oxide
gas discharge
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US711763A
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English (en)
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Taeke Tol
Bertus De Vrijer
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US Philips Corp
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US Philips Corp
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B37/00—Joining burned ceramic articles with other burned ceramic articles or other articles by heating
    • C04B37/02—Joining burned ceramic articles with other burned ceramic articles or other articles by heating with metallic articles
    • C04B37/023—Joining burned ceramic articles with other burned ceramic articles or other articles by heating with metallic articles characterised by the interlayer used
    • C04B37/025—Joining burned ceramic articles with other burned ceramic articles or other articles by heating with metallic articles characterised by the interlayer used consisting of glass or ceramic material
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B37/00—Joining burned ceramic articles with other burned ceramic articles or other articles by heating
    • C04B37/003—Joining burned ceramic articles with other burned ceramic articles or other articles by heating by means of an interlayer consisting of a combination of materials selected from glass, or ceramic material with metals, metal oxides or metal salts
    • C04B37/005—Joining burned ceramic articles with other burned ceramic articles or other articles by heating by means of an interlayer consisting of a combination of materials selected from glass, or ceramic material with metals, metal oxides or metal salts consisting of glass or ceramic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/02—Aspects relating to interlayers, e.g. used to join ceramic articles with other articles by heating
    • C04B2237/10—Glass interlayers, e.g. frit or flux
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/30—Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
    • C04B2237/32—Ceramic
    • C04B2237/34—Oxidic
    • C04B2237/343—Alumina or aluminates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/30—Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
    • C04B2237/32—Ceramic
    • C04B2237/34—Oxidic
    • C04B2237/345—Refractory metal oxides
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/62—Forming laminates or joined articles comprising holes, channels or other types of openings
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/76—Forming laminates or joined articles comprising at least one member in the form other than a sheet or disc, e.g. two tubes or a tube and a sheet or disc
    • C04B2237/765—Forming laminates or joined articles comprising at least one member in the form other than a sheet or disc, e.g. two tubes or a tube and a sheet or disc at least one member being a tube
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/84—Joining of a first substrate with a second substrate at least partially inside the first substrate, where the bonding area is at the inside of the first substrate, e.g. one tube inside another tube
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/88—Joining of two substrates, where a substantial part of the joining material is present outside of the joint, leading to an outside joining of the joint

Definitions

  • a current supply member for an electrode assembly is sealed in each end of the envelope by means of a sealing element of densely sintered aluminum oxide which is sintered to the inner wall of the envelope and is provided with an aperture into which a cylindrical current lead-in supporting at one end an electrode assembly is secured in a gastight manner.
  • the current lead-in member is provided with a cover for the envelope which is sealed to the latter by a sealing glass having a melting point higher than 800 C. and lower than the melting point of the aluminum oxide or the current supply member.
  • the invention relates to electric gas discharge lamps having an envelope of the discharge space consisting of translucent densely sintered aluminum oxide and to a method of manufacturing such a lamp.
  • the wall of a gas discharge lamp must consist of a material which at the operating temperature during the whole lifetime of the lamp is resistant to the chemical action of the gas atmosphere in the discharge space. if the temperature during operation is high, and the gas atmosphere contains constituents of an aggressive nature, as is the case, for example, in high-pressure sodium vapor lamps in which the temperature during operation is between 700 C. and 1,500 O, materials such as normal glass or quartz glass, can no longer be used. Actually they are strongly attacked during operation and then show a considerable discoloration which deteriorates the light radiation. ln addition the attack reduces the mechanical resistance of the envelope so that the possibility of fracture of the lamp is increased. In order to check these drawbacks as much as possible it is known to manufacture the envelope of such lamps from translucent densely sintered aluminum oxide.
  • This is to be understood to mean a material which consists for at least 95 percent by weight of aluminum oxide and is formed by heating a mixture of mainly aluminum oxide and a temporary binder at a very high temperature after it has been given a shape in a manner conventionally used in the ceramic industry.
  • tungsten, molybdenum and niobium are to be considered for these lamps, for example, tungsten, molybdenum and niobium; in particular niobium is particularly suitable for use as a current lead-in member since its coefficient of expansion readily matches the coefficient of expansion of the densely sintered aluminum oxide.
  • the manufacture of the gastight seals remains a very difficult operating also in the case of a suitable choice of the metal for the current lead-in members, in particular niobium.
  • the main reason for this is the particularly high melting point of the aluminum oxide (higher than l,925 C.) and the fact that aluminum oxide has no melting range, such as glass or quartz glass. Therefore a variety of constructions for the gastight seals are already known.
  • One of the conventional means to improve the seals consists in using a tubular current supply member.
  • a tubular current supply member has a certain flexibility as a result of which small differences in coefficients of expansion can more easily be compensated for. It is difficult to secure such a tube directly in the envelope and therefore the tube in a known construction is provided, in a separate operation and in a gastight manner, in a plug of translucent densely sintered aluminum oxide, which plug is again secured in a gastight manner in the envelope which consists of the same material as the plug.
  • a cover of densely sintered aluminum oxide is used of a plug being placed in the envelope, said cover being secured in a gastight manner on the outside against an opening of the envelope.
  • a likewise tubular current supply member is provided with a rather thin radial flange having a large diameter and said flange is directly secured in an aperture of the envelope of the discharge lamp.
  • Such a seal is, of course, very flexible.
  • a variation of said seal is a construction in which the flange is not sealed in an aperture of the en velope, but on the outside against it.
  • connection glass between the component parts of the seal since without such a glass substantially no gastight connection can be obtained.
  • high requirements must be imposed on the glass in connection with the high temperatures and the aggressive atmosphere to which the compounds are exposed both during the manufacture and during operation of the lamps.
  • Lamps with the above constructions are satisfactory in practice, but as a result of the particularly difficult manufacture the percentage of rejects right after the manufacture is always very high. It is the object of the invention to improve this.
  • An electric gas discharge lamp comprises an envelope of the discharge space consisting of translucent densely sintered aluminum oxide and at least one current lead-in member secured in a gastight manner in the envelope, said envelope having a cylindrical part at the area of the current lead-in member which is characterized in that a sealing element which consists of translucent densely sintered aluminum oxide is arranged in the cylindrical part and is sintered in a gastight manner to the envelope.
  • This sealing element is provided with an aperture in which the current lead-in member is secured in a gastight manner by means of a sealing glass having a melting point higher than 800 C. and lower than the melting point of the translucent densely sintered aluminum oxide and of the metal of the current lead-in member.
  • the lamp further comprises a cover having an aperture for the current lead-in member and consists of translucent densely sintered aluminum oxide and bears against the end of the cylindrical part of the envelope and against the sealing element arranged therein.
  • This cover is secured in a gastight manner to the envelope, the sealing element and the current supply member by a sealing glass having a melting point higher than 800 C. and lower than the melting point of the translucent densely sintered aluminum oxide and of the metal of the current lead-in member.
  • the cover of densely sintered translucent aluminum oxide which according to the invention is secured to the cylindrical part of the envelope and the sealing element with a sealing glass provides a particularly large certainty that no leakage can occur, particularly not along the current lead-in member. Because also between the cover and the envelope and between the cover and the sealing element a thin glass layer is present, an even more reliable gastight seal is obtained. lt desired, an extra glass rim may be arranged in the corner joint between the current lead-in member and the cover. This glass rim in fact is arranged on the outside of the whole construction and consequently cannot be attacked by the aggressive atmosphere in the discharge space.
  • the sealing glass with which the various parts are secured together must have a melting point above 800 C. because lamps according to the invention are often loaded so high that the temperature of the lamp increases to above 700 C. This is the case in particular when a high-pressure discharge is produced in the discharge space in an atmosphere which contains at least an alkyl metal, mercury and at least a rare gas.
  • the invention may be used in particular in so-called high-pressure sodium vapor lamps in which the alkali metal is sodium and the rare gas is xenon.
  • the current lead-in member at least that portion which is secured in a gastight manner in the sealing member and in the cover, preferably consists of the metal niobium.
  • the cover projects beyond the cylindrical part and a rim of sealing glass is provided in the corner joint formed between these two parts.
  • an evacuated outer envelope or an outer envelope filled with an inert gas, for example, argon, within which the envelope of the actual discharge container is arranged may be used in lamps according to the invention.
  • This outer bulb serves as a heat insulator as is the case in the low pressure sodium lamps.
  • the current lead-in member consists of a tube which is open on the side remote from the discharge space a pinlike supporting member is arranged with some clearance in the tubular current lead-in member and is rigidly secured to the outer bulb.
  • the pinlike supporting member is arranged with some clearance in the tubular current lead-in member, the actual discharge space can easily extend without forces being exerted on the current lead-in member which might result in breakage of the seal and/or the current lead-in member. Since the electric connection between the current lead-in member and the pinlike supporting member sometimes leaves much to be desired as a result of the clearance between said two parts, according to a particular embodiment of a lamp according to the invention a flexible electrically conductive connection is provided between the current lead-in member on the one hand and a pole wire which is provided in the outer bulb, for example, in a pinch thereof on the other hand.
  • FIG. 1 shows an elevation of an embodiment of an electric gas discharge lamp according to the invention showing the general construction
  • FIG. 2 is a detailed view of the construction of the gastight connection of the sealing element, the cover and the current lead-in member;
  • FIG. 3 shows a variation of the construction of Figure 2
  • FIG. 4 shows an assembly of a current lead-in member and a cover as it is used in a method of manufacturing a gas discharge lamp according to the invention
  • FIG. 5 shows an apparatus for manufacturing a gas discharge lamp according to the invention, and in particular for manufacturing the gastight seals
  • FIG. 6 shows a variation of the construction shown in Figure 1.
  • reference numeral 1 denotes the envelope of a discharge space 2, in which a gas discharge can be generated in an atmosphere which consists, for example, of sodium vapor, mercury vapor and a rare gas, for example, xenon.
  • the envelope 1 consists of translucent densely sintered aluminum oxide.
  • the electrodes 3 and 4 which are constructed in known manner and comprise inter alia a tungsten coil are arranged at the ends of the discharge space 2.
  • the electrodes 3 and 4 are secured to current supply members 5 and 6 which consist of niobium tubes.
  • 7 and 8 denote two sealing elements which likewise consist of translucent densely sintered aluminum oxide; they are secured in the envelope 1 by sintering.
  • the discharge tube 1 is arranged within an outer bulb 11 which consists, for example, of hard glass.
  • Said outer bulb comprises a pinch 12in which two supporting wires 13 and 14 are secured which likewise serve as current lead-in members for the electrodes 4 and 3, respectively.
  • 15 and 16 denote two striplike connection members which connect the electrodes 3 and 4, respectively, to the supporting wires 14 and 13, respectively.
  • a quartz tube 17 is arranged around the supporting wire 14 for protection.
  • 18 and 19 denote two gcttering rings which maintain the vacuum in the outer bulb 11.
  • FIG. 2 shows on an enlarged scale the construction of the upper end of the gas discharge tube 1 shown in Figure 1.
  • corresponding components bear the same reference numerals as in Figure 1.
  • the thick black lines 20 denote that the sealing element 7 of translucent densely sintered aluminum oxide is sintered in the envelope 1 which consists of the same material.
  • 21 denotes a sealing glass with which, as shown in the Figure, the current lead-in member 6 is secured both to the cover 9 and to the sealing element 7.
  • This sealing glass is also arranged between the cover 9 on the one hand and the envelope 1 and the sealing element 7 on the other hand.
  • the actual electrode consists of an element 22 secured in the current lead-in member 6, and consisting, for example of molybdenum. This element is secured, for example, in known manner with titanium, to the tube 6 which may consist of niobium.
  • the extremity of the element 22 is constructed as a pin and is connected to a tungsten pin 23. 24 denotes a tungsten coil which is coiled around the pinlike part and the pin. This tungsten coil may be coated, if desired, with a material which readily emits electrons.
  • the variation of the seal shown in Figure 3 comprises the same elements as in Figure 2 and these are referred to by the same reference numerals.
  • the cover 9 has a larger diameter than the envelope 1.
  • a glass rim 28 can be formed in the corner joint between the cover 9 and the envelope 1 which is an extra guarantee for a ready gastight seal.
  • the envelop 1 is first provided with the sealing elements 7 and 8. These sealing elements comprise an aperture in which the current lead-in member is to be secured.
  • This is preferably carried out as follows.
  • An assembly as shown in Figure 4 is manufactured consisting of the tubular current lead-in member 6 with the electrode 22, 23, 24 secured thereto.
  • the cover of translucent densely sintered aluminum oxide 9 is placed around the tube 6.
  • rings 25 and 26, respectively, of a vitreous or glassforming material are arranged, having a composition essentially consisting of aluminum oxide, calcium oxide, barium oxide, silicon oxide, magnesium oxide and strontium oxide.
  • 27 denotes a narrow strip or wire, for example, of molybdenum, which is secured to the current lead-in member 6.
  • FIG. 5 shows an apparatus with which the seals of a gas discharge lamp according to the invention can be made.
  • This apparatus consists of a bell 30 which is connected to a base by means of packings 31..
  • the bell 30 contains an inner tube 32 which at its upper side is provided with an aperture.
  • a metal block 36 which can be cooled by water is arranged in the tube 32. This water can be supplied at 37 and can be conducted away at 38.
  • a collar 39 of quartz having four tungsten pins 40 is arranged around the block 36. These pins 40 in turn support with their upper sides a cylinder 41 consisting of graphite.
  • a high frequency heating coil 42 is arranged around the bell 30 near the graphite cylinder 41.
  • the manufacture of the gastight seal of the envelope 43 consisting of translucent densely sintered aluminum oxide is carried out as follows.
  • Starting material is the envelope 43 in which the sealing elements 44 and 45, respectively, are already sintered and on which the assembly shown in Figure 4 is placed at one end.
  • the whole is placed in the metal block 36.
  • the tube 32 is then provided followed by the pin 35, the intermediate member 33 and the spring 34.
  • the bell 30 is then provided as a result of which the pin 35 simultaneously presses the assembly shown in Figure 4.
  • the cooling water is supplied at 37 and the whole space inside the bell 30 and the envelope 43 is filled with an inert gas, for example, argon.
  • an inert gas for example, argon.
  • the graphite cylinder 41 is then heated by means of a high frequency coil 42, until the rings 48 of glass-forming material melts and the cover 49 and the current lead-in member 50 are connected in a gastight manner to the envelope 43 and the sealing element 44. After cooling, the bell 30 and the inner tube 32 may be removed. The envelope 43 with the manufactured seal may then be removed.
  • the required quantity of mercury may be provided in the envelope. This need not be effected in an inert atmosphere.
  • the introduction of alkali metal must be carried out in an inert atmosphere.
  • the same apparatus may be used for that purpose.
  • the procedure in this case is as follows.
  • the envelope which is sealed at one end is introduced into the block 36.
  • the tube 32 is then provided after which through the supply 46 an inert gas, for example, argon is supplied.
  • the outlet 47 is closed.
  • the gas fills the whole space inside the tube 32 and it is ensured that the envelope 43 also is filled with this gas.
  • the inert gas flows out of the tube 32 at the upper end.
  • the required quantity of alkali metal for example, sodium
  • the assembly shown in FIG. 4 is then arranged on the envelope.
  • the flow of inert gas continues.
  • the pressure device 33, 34, 35 and the bell 30 are then provided.
  • the supply 46 is closed, and the whole space inside the bell 30 is evacuated through 47.
  • the rare gas, for example, xenon, which is necessary in the finished tube is then supplied through 46.
  • the second seal is then made in a similar manner as the first seal by heating.
  • a pin 61 is provided in the uppermost tubular current lead-in member 60 and is secured in the outer bulb at 62.
  • This pin 61 fits the tubular member 60 with some clearance.
  • the pin 61 and the tube 60 slide relative to one another.
  • the current lead-in to the member 60 takes place through the flexible wire 64 at one end is connected to said member and at the other end is connected to the pole wire 66 sealed in the pinch
  • What is claimed is:
  • An electric gas discharge lamp having an envelope enclosing a discharge space and consisting of translucent densely sintered aluminum oxide, and at least one current lead-in member secured in a gastight manner in the envelope, said envelope having a cylindrical part at the area of the current leadin member, a sealing element consisting of translucent densely sintered aluminum oxide disposed within the cylindrical part and sintered to the envelop in a gastight manner, said element having an aperture in which the current lead-in member is secured in a gastight manner by means of a sealing glass having a melting point higher than 800 C., and lower than the melting point of the translucent densely sintered aluminum oxide and of the metal of the current lead-in member, said lamp further comprising a cover having an aperture for the current lead-in member and consisting of a translucent densely sintered aluminum oxide and bearing against the end of the cylindrical part of the envelope and against the sealing element arranged therein, said cover being secured in a gastight manner to the envelope, the sealing element and the current lead-in member by a scaling glass having
  • An electric gas discharge lamp as claimed in claim 1 in which the envelope of the discharge space is arranged within an outer bulb and at least one tubular current lead-in member which is open on the side remote from the discharge space, a pinlike supporting member being arranged some clearance in the tubular current lead-in member, the supporting member being rigidly secured to the outer bulb.
  • An electric gas discharge lamp as claimed in claim I wherein the lead-in member is tubular having a closed end in the discharge space.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
US711763A 1967-03-31 1968-03-08 Electric discharge lamp comprising container of densely sintered aluminum oxide Expired - Lifetime US3609437A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL676704681A NL154865B (nl) 1967-03-31 1967-03-31 Elektrische gasontladingslamp met een omhulling van dichtgesinterd aluminiumoxyde en werkwijze voor het vervaardigen van een dergelijke gasontladingslamp.

Publications (1)

Publication Number Publication Date
US3609437A true US3609437A (en) 1971-09-28

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ID=19799727

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US711763A Expired - Lifetime US3609437A (en) 1967-03-31 1968-03-08 Electric discharge lamp comprising container of densely sintered aluminum oxide
US00063964A Expired - Lifetime US3726582A (en) 1967-03-31 1970-07-20 Electric discharge lamp comprising container of densely sintered aluminum oxide

Family Applications After (1)

Application Number Title Priority Date Filing Date
US00063964A Expired - Lifetime US3726582A (en) 1967-03-31 1970-07-20 Electric discharge lamp comprising container of densely sintered aluminum oxide

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US (2) US3609437A (de)
JP (1) JPS6213792B1 (de)
AT (1) AT279734B (de)
BE (1) BE713016A (de)
CH (1) CH483117A (de)
DK (1) DK139050B (de)
ES (1) ES352137A1 (de)
FR (1) FR1557527A (de)
GB (1) GB1205871A (de)
NL (1) NL154865B (de)
NO (1) NO124400B (de)
SE (1) SE333607B (de)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845343A (en) * 1973-05-02 1974-10-29 Gen Electric Inside bulb coating for ultraviolet lamp
US3855494A (en) * 1973-08-29 1974-12-17 Westinghouse Electric Corp Ceramic arc lamp construction
US3895248A (en) * 1969-03-11 1975-07-15 Philips Corp Gas discharge device with glow discharge igniting structure
US3967871A (en) * 1972-06-23 1976-07-06 Egyesult Izzolampa Es Villamossagi Resvenytarsasag Process for manufacturing tubeless vacuum electric discharge lamps
US3992642A (en) * 1975-12-15 1976-11-16 Mcvey Charles I Ceramic envelope plug and lead wire and seal
US3996487A (en) * 1975-05-14 1976-12-07 Westinghouse Electric Corporation Ceramic discharge lamp with reduced heat drain
US4034252A (en) * 1975-12-15 1977-07-05 General Electric Company Ceramic lamp seal and control of sealing frit distribution
US4122042A (en) * 1976-08-05 1978-10-24 U.S. Philips Corporation Composite body useful in gas discharge lamp
JPS53166577U (de) * 1978-04-27 1978-12-27
US4160186A (en) * 1977-01-06 1979-07-03 Egysult Izzolampa Es Villamossagi Reszvenytarsasag Closure structure of electric discharge tubes
US4198586A (en) * 1977-04-15 1980-04-15 U.S. Philips Corporation High pressure metal vapor discharge lamp and seal structure therefor
US4277715A (en) * 1976-11-02 1981-07-07 U.S. Philips Corporation Electric gas discharge lamp
US4281274A (en) * 1979-08-01 1981-07-28 General Electric Co. Discharge lamp having vitreous shield
JPS5739116A (en) * 1980-08-18 1982-03-04 Matsushita Electric Ind Co Ltd Jig for heat treatment
DE3111278A1 (de) * 1980-06-20 1982-03-04 Egyesült Izzólámpa és Villamossági Részvénytársaság, 1340 Budapest Hochdruck-natriumlampe mit aluminiumoxyd-entladungsroehre und verfahren zu ihrer herstellung
US4382205A (en) * 1980-09-02 1983-05-03 General Electric Company Metal vapor arc lamp having thermal link diminishable in heat conduction
US4539511A (en) * 1981-09-04 1985-09-03 Thorn Emi Plc High pressure discharge lamps with means for reducing rectification
US4774431A (en) * 1986-09-29 1988-09-27 North American Philips Lighting Corp. Arc tube wire support
US4804889A (en) * 1987-12-18 1989-02-14 Gte Products Corporation Electrode feedthrough assembly for arc discharge lamp
US5288255A (en) * 1990-10-31 1994-02-22 North American Philips Corporation Method of manufacturing a high-pressure discharge lamp with end seal evaporation barrier
EP1378001A1 (de) * 2001-02-23 2004-01-07 Osram Sylvania Inc. Keramische bogenröhre mit hohem puffergasdruck und verfahren und vorrichtung zu ihrer herstellung
US20040083761A1 (en) * 2002-10-31 2004-05-06 Cooper Timothy J. Sealing lighting device component assembly with solder glass preform by using induction heating
US20040083760A1 (en) * 2002-10-31 2004-05-06 Canale Joseph E. Sealing lighting device component assembly with solder glass preform by using infrared radiation

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NL7003667A (de) * 1970-03-14 1971-09-16
JPS4893180A (de) * 1972-03-08 1973-12-03
US3866280A (en) * 1973-12-26 1975-02-18 Gte Sylvania Inc Method of manufacturing high pressure sodium arc discharge lamp
NL178108C (nl) * 1978-04-10 1986-10-16 Philips Nv Elektrische gasontladingslamp.
NL8200783A (nl) * 1982-02-26 1983-09-16 Philips Nv Hogedrukontladingslamp.
US4988318A (en) * 1983-03-10 1991-01-29 Gte Products Corporation Unsaturated vapor high pressure sodium lamp arc tube fabrication process
CA1246136A (en) * 1983-03-10 1988-12-06 Philip J. White Arc tube fabrication process
US5026311A (en) * 1983-03-10 1991-06-25 Gte Products Corporation Arc tube fabrication process
CA1241365A (en) * 1983-03-10 1988-08-30 John A. Scholz Unsaturated vapor high pressure sodium lamp arc tube fabrication process
EP0187401A1 (de) * 1984-12-18 1986-07-16 Koninklijke Philips Electronics N.V. Hochdruckentladungslampe
US4868457A (en) * 1985-01-14 1989-09-19 General Electric Company Ceramic lamp end closure and inlead structure
HU196531B (en) * 1986-09-29 1988-11-28 Philips Nv High-pressure discharge lamp with wire-suspended discharge tube
US4702717A (en) * 1987-01-30 1987-10-27 Gte Products Corporation Method of making electric lamp with internal conductive reflector
DE4037721C2 (de) * 1990-11-27 2003-02-13 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Verfahren zur Herstellung einer Natriumhochdrucklampe sowie dafür geeignete Vorrichtung
US6641449B2 (en) * 2001-04-24 2003-11-04 Osram Sylvania Inc. High pressure lamp bulb and method of induction sealing
GB2383486B (en) * 2001-12-19 2005-02-16 Microwave Solutions Ltd Detector device

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DE1257964B (de) * 1965-03-11 1968-01-04 Patra Patent Treuhand Elektrische Lampe, insbesondere Alkalimetalldampfentladungslampe, mit einem Gefaess aus transparentem Aluminiumoxyd
US3363134A (en) * 1965-12-08 1968-01-09 Gen Electric Arc discharge lamp having polycrystalline ceramic arc tube
US3453477A (en) * 1967-02-16 1969-07-01 Gen Electric Alumina-ceramic sodium vapor lamp

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US3895248A (en) * 1969-03-11 1975-07-15 Philips Corp Gas discharge device with glow discharge igniting structure
US3967871A (en) * 1972-06-23 1976-07-06 Egyesult Izzolampa Es Villamossagi Resvenytarsasag Process for manufacturing tubeless vacuum electric discharge lamps
US3845343A (en) * 1973-05-02 1974-10-29 Gen Electric Inside bulb coating for ultraviolet lamp
US3855494A (en) * 1973-08-29 1974-12-17 Westinghouse Electric Corp Ceramic arc lamp construction
JPS5055176A (de) * 1973-08-29 1975-05-15
US3996487A (en) * 1975-05-14 1976-12-07 Westinghouse Electric Corporation Ceramic discharge lamp with reduced heat drain
US3992642A (en) * 1975-12-15 1976-11-16 Mcvey Charles I Ceramic envelope plug and lead wire and seal
US4034252A (en) * 1975-12-15 1977-07-05 General Electric Company Ceramic lamp seal and control of sealing frit distribution
US4122042A (en) * 1976-08-05 1978-10-24 U.S. Philips Corporation Composite body useful in gas discharge lamp
US4277715A (en) * 1976-11-02 1981-07-07 U.S. Philips Corporation Electric gas discharge lamp
US4160186A (en) * 1977-01-06 1979-07-03 Egysult Izzolampa Es Villamossagi Reszvenytarsasag Closure structure of electric discharge tubes
US4198586A (en) * 1977-04-15 1980-04-15 U.S. Philips Corporation High pressure metal vapor discharge lamp and seal structure therefor
JPS53166577U (de) * 1978-04-27 1978-12-27
US4281274A (en) * 1979-08-01 1981-07-28 General Electric Co. Discharge lamp having vitreous shield
DE3111278A1 (de) * 1980-06-20 1982-03-04 Egyesült Izzólámpa és Villamossági Részvénytársaság, 1340 Budapest Hochdruck-natriumlampe mit aluminiumoxyd-entladungsroehre und verfahren zu ihrer herstellung
JPS5739116A (en) * 1980-08-18 1982-03-04 Matsushita Electric Ind Co Ltd Jig for heat treatment
US4382205A (en) * 1980-09-02 1983-05-03 General Electric Company Metal vapor arc lamp having thermal link diminishable in heat conduction
US4539511A (en) * 1981-09-04 1985-09-03 Thorn Emi Plc High pressure discharge lamps with means for reducing rectification
US4774431A (en) * 1986-09-29 1988-09-27 North American Philips Lighting Corp. Arc tube wire support
US4804889A (en) * 1987-12-18 1989-02-14 Gte Products Corporation Electrode feedthrough assembly for arc discharge lamp
US5288255A (en) * 1990-10-31 1994-02-22 North American Philips Corporation Method of manufacturing a high-pressure discharge lamp with end seal evaporation barrier
EP1378001A1 (de) * 2001-02-23 2004-01-07 Osram Sylvania Inc. Keramische bogenröhre mit hohem puffergasdruck und verfahren und vorrichtung zu ihrer herstellung
EP1378001A4 (de) * 2001-02-23 2006-08-30 Osram Sylvania Inc Keramische bogenröhre mit hohem puffergasdruck und verfahren und vorrichtung zu ihrer herstellung
US20040083761A1 (en) * 2002-10-31 2004-05-06 Cooper Timothy J. Sealing lighting device component assembly with solder glass preform by using induction heating
US20040083760A1 (en) * 2002-10-31 2004-05-06 Canale Joseph E. Sealing lighting device component assembly with solder glass preform by using infrared radiation
US6976372B2 (en) * 2002-10-31 2005-12-20 Corning Incorporated Sealing lighting device component assembly with solder glass preform by using induction heating
US7040121B2 (en) * 2002-10-31 2006-05-09 Corning Incorporated Sealing lighting device component assembly with solder glass preform by using infrared radiation

Also Published As

Publication number Publication date
DE1639086B2 (de) 1975-10-23
GB1205871A (en) 1970-09-23
AT279734B (de) 1970-03-10
JPS6213792B1 (de) 1987-03-28
US3726582A (en) 1973-04-10
FR1557527A (de) 1969-02-14
DE1639086A1 (de) 1970-05-27
BE713016A (de) 1968-09-30
NO124400B (de) 1972-04-10
ES352137A1 (es) 1970-04-16
DK139050B (da) 1978-12-04
NL6704681A (de) 1968-10-01
SE333607B (de) 1971-03-22
DK139050C (de) 1979-05-14
NL154865B (nl) 1977-10-17
CH483117A (de) 1969-12-15

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