EP0942456A2 - Quecksilber- und Bleilose Natrium-Hochdruckentladungslampe - Google Patents

Quecksilber- und Bleilose Natrium-Hochdruckentladungslampe Download PDF

Info

Publication number: EP0942456A2
Authority: EP; European Patent Office
Prior art keywords: lamp; arc tube; lead; outer envelope; free
Prior art date: 1998-03-12
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Granted

Application number

EP99103825A

Other languages

English (en)

French (fr)

Other versions

EP0942456A3 (de

EP0942456B1 (de

Inventor

Robert B. Dolan

John L. Plumb

Elliot F. Wyner

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Osram Sylvania Inc

Original Assignee

Osram Sylvania Inc

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1998-03-12

Filing date

1999-02-27

Publication date

1999-09-15

1999-02-03 Priority claimed from US09/244,252 external-priority patent/US6268696B1/en

1999-02-27 Application filed by Osram Sylvania Inc filed Critical Osram Sylvania Inc

1999-09-15 Publication of EP0942456A2 publication Critical patent/EP0942456A2/de

1999-09-29 Publication of EP0942456A3 publication Critical patent/EP0942456A3/de

2004-08-04 Application granted granted Critical

2004-08-04 Publication of EP0942456B1 publication Critical patent/EP0942456B1/de

2019-02-27 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 title claims abstract description 12
239000011734 sodium Substances 0.000 title claims abstract description 12
229910052708 sodium Inorganic materials 0.000 title claims abstract description 12
QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 title description 4
229910052753 mercury Inorganic materials 0.000 title description 4
239000011521 glass Substances 0.000 claims abstract description 8
238000003466 welding Methods 0.000 claims abstract description 4
229910052724 xenon Inorganic materials 0.000 claims abstract description 4
FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims abstract description 4
PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 7
MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 6
VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
239000005388 borosilicate glass Substances 0.000 claims description 4
KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 3
CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 claims description 3
229910000422 cerium(IV) oxide Inorganic materials 0.000 claims description 3
JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 claims description 3
229910011255 B2O3 Inorganic materials 0.000 claims description 2
FUJCRWPEOMXPAD-UHFFFAOYSA-N Li2O Inorganic materials [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 claims description 2
229910052681 coesite Inorganic materials 0.000 claims description 2
229910052593 corundum Inorganic materials 0.000 claims description 2
229910052906 cristobalite Inorganic materials 0.000 claims description 2
XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 claims description 2
239000000203 mixture Substances 0.000 claims description 2
229920006395 saturated elastomer Polymers 0.000 claims description 2
239000000377 silicon dioxide Substances 0.000 claims description 2
229910052682 stishovite Inorganic materials 0.000 claims description 2
229910052905 tridymite Inorganic materials 0.000 claims description 2
229910001845 yogo sapphire Inorganic materials 0.000 claims description 2
NOTVAPJNGZMVSD-UHFFFAOYSA-N potassium monoxide Inorganic materials [K]O[K] NOTVAPJNGZMVSD-UHFFFAOYSA-N 0.000 claims 1
CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 claims 1
CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
229910052785 arsenic Inorganic materials 0.000 description 3
RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 3
229910052758 niobium Inorganic materials 0.000 description 3
239000010955 niobium Substances 0.000 description 3
GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 3
229910000679 solder Inorganic materials 0.000 description 3
239000000919 ceramic Substances 0.000 description 2
239000004020 conductor Substances 0.000 description 2
239000000395 magnesium oxide Substances 0.000 description 2
OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
240000007472 Leucaena leucocephala Species 0.000 description 1
235000010643 Leucaena leucocephala Nutrition 0.000 description 1
239000005354 aluminosilicate glass Substances 0.000 description 1
230000015556 catabolic process Effects 0.000 description 1
238000002788 crimping Methods 0.000 description 1
230000005684 electric field Effects 0.000 description 1
230000007613 environmental effect Effects 0.000 description 1
231100001261 hazardous Toxicity 0.000 description 1
230000004048 modification Effects 0.000 description 1
238000012986 modification Methods 0.000 description 1
239000010453 quartz Substances 0.000 description 1
WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1

Images

Classifications

- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
- H01J61/825—High-pressure sodium lamps
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
- H01J5/50—Means forming part of the tube or lamps for the purpose of providing electrical connection to it
- H01J5/54—Means forming part of the tube or lamps for the purpose of providing electrical connection to it supported by a separate part, e.g. base
- H01J5/62—Connection of wires protruding from the vessel to connectors carried by the separate part
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
- H01J61/18—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent
- H01J61/22—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent vapour of an alkali metal
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
- H01J61/302—Vessels; Containers characterised by the material of the vessel
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
- H01J61/34—Double-wall vessels or containers

Definitions

This invention relates to discharge lamps and more particularly to high pressure sodium lamps. Still more particularly, it relates to such lamps that are environmentally disposable.
Discharge lamps generally include a discharge chamber of quartz or alumina supported within an envelope of borosilicate or aluminosilicate glass. Disposal of these lamps at the end of life has been deemed an environmental hazard because the outer envelope glass includes lead and arsenic and the discharge chamber includes mercury. Further, the electrically conductive base may have the in-leads for the lamp attached thereto by a lead-based solder. The lead, arsenic and mercury are presumed to be hazardous to animal and human health.
Yet another object of the invention is the enhancement of lamp disposal.
a long-life, environmentally disposable high pressure sodium lamp comprising: an arc tube capable of withstanding internal wall temperatures of 1250 to 1300°C and having electrodes sealed therein and being designed for operation at a given wattage; a discharge space within the arc tube and an arc generating and sustaining medium within the discharge space, the medium being mercury-free and containing sodium in an amount of about 0.02 mg to 0.06 mg/watt of designed operation, and xenon at a pressure of 100 to 200 Torr; mounting means supporting the arc tube within a glass outer envelope, the glass outer envelope being lead-tree and arsenic-free; and an electrically conductive base closing the outer envelope and containing lead-in wires affixed to the electrodes, the lead-in wires being attached to the base by welding.
Lamps so constructed may be safely and legally disposed of in conventional land fills.
the single figure illustrates a lamp embodying the invention.
a reentrant stem press 8 has a pair of relatively heavy lead-in conductors 10 and 12 extending through the stem 8 and having outer ends of conductors 10 and 12 connected to the screw shell 17 and eyelet 18 by welding, thus eliminating the need for lead-bearing solder.
the lamp 100 has an inner envelope or arc tube 14 centrally located within the outer envelope 6.
the arc tube 14 is comprised of a length of light transmitting ceramic formed of polycrystalline alumina ceramic that is translucent.
the arc tube 14 contains a charge of an arc generating and sustaining medium which is mercury-free and contains sodium in a amount of 0.02 to 0.06 mg/watt of designed lamp operation (for lamps of 70 to 150 watt operation), and 100 to 200 Torr of xenon, preferably, 140 to 160 Torr.
the amount of sodium present is enough to operate the lamp in a saturated mode for the 24,000 hour life.
the upper end of the arc tube 14 is closed by a alumina ceramic plug 20 through which a niobium in-lead 26 projects and which supports an upper electrode (not shown) within the arc tube 14.
the lower end of arc tube 14 has a closure which comprises a ceramic plug 21 through which extends a thin-walled niobium tube 26.
the niobium tube 26 serves as an in-lead for arc tube 14.
the shank of the lower electrode (not shown) of arc tube 14 projects into tube 26 and may be locked in place by crimping the tube 26 about the lower electrode at location 25.
the arc tube 14 has a tungsten wire 50 coiled thereabout.
the wire 50 is connected to one of the electrodes by a thermal switch 52 and is placed between the electrodes where the lowest breakdown voltage is achieved. The thermal switch opens when the lamp is warm so as to minimize electric fields across the tube wall
the arc tube 14 is of primary interest to the invention and has a arc chamber 40 defined by walls 42.
the arc tube comprises magnesia in an amount of about 0.020 to 0.050 wgt. percent; zirconia in an amount of about 0.018 wgt. percent, and about 0.035 wgt. percent yttria; balance alumina.
Such an arc tube is capable of operating with internal wall temperatures of 1250 to 1300°C and is shown in U.S. Patent No. 5,682,082, which is assigned to the assignee of the instant invention.
the outer envelope 6 is lead-free ad arsenic-free and preferably is a borosilicate glass having a composition of 13.5 to 16.8 wt. % B 2 O 3 , 2.0 to 4.0 wt % Al 2 O 3 , 2.0 to 5 wt. % Na 2 O, 1.3 to 4.0 wt. % K 2 0, from 0 to 0.30 wt. % Li 2 O, 0 to 1.0 wt. % CaO, 0 to 1.0 wt. % MgO, 0.05 to 0.17 wt. % Fe 2 O 3 , 0.005 to 0.06 wt. % CeO 2 , and the balance SiO 2 .
the amounts of Fe 2 O 3 and CeO 2 comprise no greater than 0.19 wt. % and the sum of the amounts of Na 2 O, K 2 O and LiO 2 comprise no greater that 7.5 wt. %.
Such a glass is shown, for example in S.N. 09/085,989, filed 05/28/98 and assigned to the assignee of the present invention.
the lamp has a 24,000 hour life.

Landscapes

Vessels And Coating Films For Discharge Lamps (AREA)
Discharge Lamp (AREA)

EP99103825A 1998-03-12 1999-02-27 Quecksilber- und Bleilose Natrium-Hochdruckentladungslampe Expired - Lifetime EP0942456B1 (de)

Applications Claiming Priority (4)

Application Number	Priority Date	Filing Date	Title
US7769898P	1998-03-12	1998-03-12
US77698P		1998-03-12
US09/244,252 US6268696B1 (en)	1999-02-03	1999-02-03	Mercury and lead free high pressure sodium lamp
US244252		1999-02-03

Publications (3)

Publication Number	Publication Date
EP0942456A2 true EP0942456A2 (de)	1999-09-15
EP0942456A3 EP0942456A3 (de)	1999-09-29
EP0942456B1 EP0942456B1 (de)	2004-08-04

Family

ID=26759571

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP99103825A Expired - Lifetime EP0942456B1 (de)	1998-03-12	1999-02-27	Quecksilber- und Bleilose Natrium-Hochdruckentladungslampe

Country Status (5)

Country	Link
EP (1)	EP0942456B1 (de)
JP (1)	JPH11288692A (de)
CA (1)	CA2261380A1 (de)
DE (1)	DE69919056T2 (de)
HU (1)	HU222332B1 (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5682082A (en)	1996-07-29	1997-10-28	Osram Sylvania Inc.	Translucent polycrystalline alumina and method of making same
US8598998B2 (en)	2012-03-26	2013-12-03	Volacom Ad	Animal collision avoidance system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPH07272680A (ja) *	1994-03-31	1995-10-20	Toshiba Lighting & Technol Corp	セラミックス放電灯、放電灯点灯装置および照明器具
US5814944A (en) *	1996-01-22	1998-09-29	Matsushita Electric Works, Ltd.	High pressure sodium vapor lamp with high color rendering
US6118216A (en) *	1997-06-02	2000-09-12	Osram Sylvania Inc.	Lead and arsenic free borosilicate glass and lamp containing same

1999
- 1999-02-08 CA CA002261380A patent/CA2261380A1/en not_active Abandoned
- 1999-02-27 EP EP99103825A patent/EP0942456B1/de not_active Expired - Lifetime
- 1999-02-27 DE DE69919056T patent/DE69919056T2/de not_active Expired - Lifetime
- 1999-03-09 HU HU9900559A patent/HU222332B1/hu not_active IP Right Cessation
- 1999-03-11 JP JP11064920A patent/JPH11288692A/ja active Pending

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5682082A (en)	1996-07-29	1997-10-28	Osram Sylvania Inc.	Translucent polycrystalline alumina and method of making same
US8598998B2 (en)	2012-03-26	2013-12-03	Volacom Ad	Animal collision avoidance system

Also Published As

Publication number	Publication date
DE69919056T2 (de)	2004-12-30
JPH11288692A (ja)	1999-10-19
HU9900559D0 (en)	1999-05-28
CA2261380A1 (en)	1999-09-12
HUP9900559A2 (hu)	1999-10-28
EP0942456A3 (de)	1999-09-29
HU222332B1 (hu)	2003-06-28
DE69919056D1 (de)	2004-09-09
HUP9900559A3 (en)	2001-04-28
EP0942456B1 (de)	2004-08-04

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