CA1239970A - Metal halide lamp with arc tube shield support - Google Patents
Metal halide lamp with arc tube shield supportInfo
- Publication number
- CA1239970A CA1239970A CA000497535A CA497535A CA1239970A CA 1239970 A CA1239970 A CA 1239970A CA 000497535 A CA000497535 A CA 000497535A CA 497535 A CA497535 A CA 497535A CA 1239970 A CA1239970 A CA 1239970A
- Authority
- CA
- Canada
- Prior art keywords
- arc tube
- frame means
- cylindrical member
- lamp
- improvement according
- Prior art date
- 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.)
- Expired
Links
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
- H01J61/827—Metal halide arc lamps
-
- 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
Abstract
METAL HALIDE LAMP WITH ARC TUBE SHIELD
ABSTRACT
An improved metal halide discharge lamp having an outer envelope wherein is disposed an arc tube, a cylindrical member that prevents shard dispersion upon fracture of the arc tube and frame means. The arc tube and cylindrical member are both supported within the lamp by the frame means. The frame means is comprised of a single wire member having a small circular portion, a helical portion and a substantially straight portion. The straight portion may have a small wire attached thereto, in order to secure the cylindrical member in place when the member positioned within the helical portion of the frame means. The arc tube is electrically coupled to the frame means and is concentric to the cylindrical member.
ABSTRACT
An improved metal halide discharge lamp having an outer envelope wherein is disposed an arc tube, a cylindrical member that prevents shard dispersion upon fracture of the arc tube and frame means. The arc tube and cylindrical member are both supported within the lamp by the frame means. The frame means is comprised of a single wire member having a small circular portion, a helical portion and a substantially straight portion. The straight portion may have a small wire attached thereto, in order to secure the cylindrical member in place when the member positioned within the helical portion of the frame means. The arc tube is electrically coupled to the frame means and is concentric to the cylindrical member.
Description
.
~3~
D-83-1-0~5 ~SETAL HI~L~D~ LAPIP ~ilITt3! ~;EIC TUB~ 8~I~L0 ~UIPPO~T
Tl~CEl~ICAL ~ LD - -The prsse~t i~v~lltion r~late~ t iDI ~eneral, to ~etal ~al~de di6c~large la~6 a~d ~ore par~ ula~ly ts ~etal h~lide dis~ha~g2 5 lamps conf i~ured to ~revent breakage of the 1 a~p ' 8 outer envelop~ by reduci~g 6hard di~per6io~ upo~ a~ arc tub~ ra~ture.
E~ACKGROUND OF TH~ INVENTION
The high pre~ure discharge lamps of the inve~ti~ operate ~y vapsrizi~g ~ercury a~d ~el~ted ~e~al halide~ and often a~e 10 8ill~p1y ~al1ed meta1 ha1i~e la~p~. ~igh watta~e ~etal halide lam~ ich a~hieve re1ative1y high ef f i~aey are k~o~n i~ the ~rt. ~owever, the6~ ~igh wattage 1a~p6 are too large or ge~eEa1 i11uminating pur~o6e~ in a ~ome or the li~.
Intermediate ~datta~e ~eta1 halide 1asi~p~ ~hi~h can be u6ed for 15 ~ome gel~eral i11u~inating purpo~e~ are k~ob~ bu~ their ef f icacy i~ lo~ whe~ eompared w;th lamp6 of 1arge ~ize~.
Through the recen~ ~ve10pl0e~t of ~iniaocu~e arc tube6, lamp design~r~ have bee~ ab1~ to achieve acceptab1e ef f icac;e6 in ~ma11er 8iZ!~e6 oiE ~eta1 ha1ide di~cha~ge 1amps to 3u~tify it~
~3~
D-83-1-0~5 ~SETAL HI~L~D~ LAPIP ~ilITt3! ~;EIC TUB~ 8~I~L0 ~UIPPO~T
Tl~CEl~ICAL ~ LD - -The prsse~t i~v~lltion r~late~ t iDI ~eneral, to ~etal ~al~de di6c~large la~6 a~d ~ore par~ ula~ly ts ~etal h~lide dis~ha~g2 5 lamps conf i~ured to ~revent breakage of the 1 a~p ' 8 outer envelop~ by reduci~g 6hard di~per6io~ upo~ a~ arc tub~ ra~ture.
E~ACKGROUND OF TH~ INVENTION
The high pre~ure discharge lamps of the inve~ti~ operate ~y vapsrizi~g ~ercury a~d ~el~ted ~e~al halide~ and often a~e 10 8ill~p1y ~al1ed meta1 ha1i~e la~p~. ~igh watta~e ~etal halide lam~ ich a~hieve re1ative1y high ef f i~aey are k~o~n i~ the ~rt. ~owever, the6~ ~igh wattage 1a~p6 are too large or ge~eEa1 i11uminating pur~o6e~ in a ~ome or the li~.
Intermediate ~datta~e ~eta1 halide 1asi~p~ ~hi~h can be u6ed for 15 ~ome gel~eral i11u~inating purpo~e~ are k~ob~ bu~ their ef f icacy i~ lo~ whe~ eompared w;th lamp6 of 1arge ~ize~.
Through the recen~ ~ve10pl0e~t of ~iniaocu~e arc tube6, lamp design~r~ have bee~ ab1~ to achieve acceptab1e ef f icac;e6 in ~ma11er 8iZ!~e6 oiE ~eta1 ha1ide di~cha~ge 1amps to 3u~tify it~
2~ use as a rep1aceme~t f or the ~tandard i~cande~cent lamp .
E30veYe~" t~le remote po~6ibil~ty of a mi~or dis~e~6io~ oî gliil ~hard6 resu1ti{lg from a frac~cuLe of ~he pressurized 1ight-sour~e cap~ule ~e.g., arc tube) ~ontairl~d within the la~p ls a ~ub6ta~tia1 i~pediment in the ~ath of deve10ping a 25 fea~ible rep1acement in the indu~tria1 or commercia1 ~alke~.
A1though occurrence of ~uch a îracture i6 rare, ~everthe1e~, , .. ~, ~23~
~ould pre~ent a ~Eety hazard to ~ ~r~0~ o~ ob~ect ~nl t1he YiC~ity of t~e la~p ~i.e., ~oo~ pE~para~ion~0 Thersore, it woul~ bs ~ abl~ to ~vi~e a ~i~pl~ hod that woul~ ~llo~d or t~2 ~a~ u~ o~ ~uch a lalinp ill a~ ~en 5 f ixture.. ~ ~rc ~ haE~e lallnp whi~ ub~ta~t~ally ~li~inate~
tlle problem o~ ~ard di~per~io~ uRol~ t~e ~r~cture of t~e light-E~oulee cap~ule would con~tiLtu~ an advaD,~eDnent ~n t~e art .
Me~hod6 have been ~ugge6ted to improve the abllity oiE
10 ~ung6ten halogen an~ arc di~cha~ge la~p~ to with~arl~ a f~cacture ~sf ~he inn~r light-~ource cap~ule. I~ orle ~xa~ple, the shard~ are re6tricted f ~o~ impacting ~ith the outer envelope throuslh tl~e U8~ of ~ crlinddvical body di~o~ed albou~
the arc tube, U.S. Pat~llt 4,281~274, i~ued July 28, 1981 to 15 ~3e~hard ~t al. The problern wi'ch ehe a~rangement de~cri~ed i~
Bechard ~t al i~ t~lat the ~t~ucture for aou!lting both the arc - ~~ tu~e and tihe particular ~ylindri~al body is comple~ and r~guir~ ~eldiEIg 6everal ~art~ to51ethar. ~hi~ leaa~ to increas~d eo6t and ma~ufacturing diîPicultiefi durillg ~he 20 process o~ ~a~i~g ~uch a lamp.
It i~ believedd herfi~fore, that an glec~ic la~ap ~b.at provi~e6 for a siD~ple and ineacpenhive ~eans or ~ounting a~ ar~
tube a~d preverlti~g shard dispersion upo~ a~ ar~ tube f ractllre, and ~ould al~o ~ver~ome the otlher di~adva~'cages as~ociated ~ith 25 the prior art devices mentioned abo-.re, ~ould CoEISti~ute a signif i~ant adva~er~ent in the art .
lDISCLOSllRE OF THE IN~NTICIN
, there~oreO a primary obj~ctive oiE thi~ inven~ioal ~o overcome the di~advaneage6 of the prior art deYice6 ~u~ a~
30 mentio~ed above.
'I ~
It ~ a~otber ob~@~t o t~is ~ve~io~ to ~rovide elec~r~c la~p ~hic~ ~ill ~u~st~nt4ally ~liainate th2 pos~ibility o~ ~nor ~ard al~per~iorl upo~ r~ctu~ of ~
pre~surized light-~ource cap~ule ~t ~ pl~l3 an~ pe~ re 5 to manuf~c~ure.
Another ob~ect of tll~s il~Yention i~ to ~rovide ~ea~ for ~up~orting a light-~ource capsule a:~d ~o~ta~ent s~ans about the ca~sule wh~ch will cau6e li~tle or ~o 10~8 oiE 1UD~ >U6 efficacy in lamps utiliæing such meanB.
11l accordance with one a~pect of the present inventiorl, theEe is provi 31ed a~ imp~oved metal hal~le discb.a~ge lamp of the type h~ving an outer envelope, a ~te~ ~ember located withir t~e outer envelope ~a~ing a pair of ele~t~i~al conductors extending ther~f Io~ alld a ~ame ~ean6 lo~a~ed ~it~in the outer 15 envelop2 an~ supported by one of the elec~ical co~ductor~.
~he la~np al60 include~ an arc tube, su~por~ced by a~d ele~trically ~oupled to the f~ame ~eans, havin~ a ~heluical fill in~luding a sod~u~ ~alide. Tlhe arc tube ha~ a pai~ of elec~rical l~ad~ ~ealed in~ ~nd pa~ g ~h~ough at lf~a8t one 20 end thereof ~v provid~ a pair oî electrode~ t~erein. P.
cylindrical ~embe~ i~ al~o in~luded in lthe la~p ~dhi~h i~
supported by t~e îra~e ~aeans and surround6 the ar~ tube. The impro~remeIlt in the la~p lies ~rith tihe f rame ~ea~s whi~h co~pri~es a 6ingle wire D~e~nber ~ having ~ particular 25 conf iguration. which ~upport6 the arc tube withi~ e lamp and fixedly z~aintain~ t~e cylind~ical ~ember about the arc tube.
The frame means e:~tend~ aloag a~l a~lCi6 6ubstan~ially parallel to the longitudi~al a~i~ of the lamp.
~Z39~70 D-8~ 065 B~ DE~ aIlP~I0~3 O~ 1~ D~NI~!t:
Th~ PIGUP.12 ~llustrate~ 0-a2 ~ o~i~en~ of tZtle ~et~ lide la~p ~ade ir~ a~co2~a~lce d~th t~e teaclli~gs of th~ lpre~e~
inve~t io~ .
BI~T ~ODE FO~ CARE~YING OUT THE~ NTION
For ~ better llnd~r~tanding o~ the prese~t ~ ~ventio~, toget~er ~dith otlher ~nd u~the~ ob~ect~, advanea~e~, a~d capabilitie~ ther~of, ~ef2re~ce i8 !aadg ~0 the fsllowl~g di~clo~ure aIId appended claim6 in ~on3unction w~th the above deE;clibed dra~;~g.
A~ u~ed h@reil~O t~e term "lighe-sou~ce ~ap6ule" denot~:
-- an arc tube of an arc di~charge lamp, or any li~ t emitting cap6ule withi~ the outer enYelope of the lam~ wher~ che lig~ ource cap6ule op~rates at a pre6~ure ot~er t~ar a~mo~;pheric and t~e ~06~;:ibililt,y oiE ~i~or ~hard di~pe~ion upo~
fracture of the ligh~-~ource cap6ule QXi8tS.
~eferring no~ lco the dra~ g ~ith greater parlcicularity, the FI~:UE~E show~ a metal Ihalide lamp 10 ~ade in ac~o~dance with the t2achin~s of tlhe pre~ent invention. ~etal kaalid* dischar~e lamp lO include~ all evacua~ed nu~er envelope 12, ~b,ieh i~
hermetically ~aaled t~ a gla6s stem meE~ber 14, and an e~cte~al base 16. Ba~e 16 i6 îormed for ea~y ~onnectio~ ~o a~l electrlcal ~ource and i6 affixed to the hermetically ~eal~d ~tem ~ember 14 and outer e~velope 12. A pair of electrical conduc~ors 18 and 20 are ~ealed i~to and pa~s through s~te~
nember 14 and are electri cally connected to ba~e 16, e~cternal of outer e~velope 12 ~ to provide accefis f or energiza~ion of dischalge lamp 10.
:~23~70 D-~3-1-û6~
Yacua~a ~u~er ~v~ 12 ~le~ al ~n~ or 20 ~ g~ sn~u~t~Y~ ~r~e s~2an~ 2~. Fram2 g3~an~ 22 ~xtena~ alo~ a~is $ub~ ti~1îy parallel ~o ~he long~tud~al a~is o~ c~arge laD~p 10 ~d 5 include~ a ~r~ular portio~ ol?~rae~r0 co~t~et ~ n upper~os~t ~or~ion 23 of ou'ce~ ~nvelop~ 1;tD ~al heli~al portio~ 25 and a sub6tant~ally ~traight p~rtio~ 26. Circular po~t~on 24, in conjunction with the uppers~o6t po~tion 23, and 8~ embe~
14 ~erve the au~l ~unction o~ ~aintaining ~rame ~ea~6 22 in pr~per align~e~ and ~e6i6~ing defor~atio~ due ~o e~ternal shoc~ to discharge lamp 10.
Di~po6ed ~ithin ou~er e~velope 12 18 a ~yl1~drical ~ember 36, whic~ may ~e i~ the or~ of a quar~2 ~leeve or shield.
~hic~ upport~d by fra~e ~eans 22. Al~o ~uppor~ed by ~Eame ~eans 22 ~nd contaîned within quartz ~hield ~6 i~ an arc tub~
28. Arc tube 2B ha8 a ~hemical ~ill includi~g a Rodiu~ ~al~d~
~nd electrodes 29 a~d 30 at o~e end t~e~eo. ~oreo~et, ~lectlode 29 i~ mechanically and el~c ~ieally con~ected to fra~e ~ean6 22 t~r~ugh an ~lectrical lead 32 whil2 elec~ode 30 î6 affi~d to a~ ~leetri~al lsad 34 ~hi~h pa6~ æ above a po~tion of ~ylindri~al ~ber 36 and ~æ ele~t~ically and ~echa~ically connected to electrical connector 18 by a con~ector ~ire 40. ~ire 40 i8 preferably ~ade of ~olybdenum.
Cylindrieal member 36 i6 lo~a~ed with~n and i8 ~upporeed by ~elic~l por~ion Z5 of f~ame mean6 22. Cylindrical ~ember 36 i~
~ecured in frame ~ean6 2~ by a b~d 21 and a s~all nickel wire 38 which i6 ~elded to the upper most pa~t o~ said strai~ht portio~ 26 of frame ~ea~s 22. A small ~iRk o~ bend i~ the upper~o~t part of ~traig~t portion Z6 ~ay be ~ubstituted ~or ~ire 3~ in ~ecuring cylindrical ~ember 36 in ~06i~io~.
The purpo6e of the ~re~ent inventio~ i6 ~0 provide a ~imple and i~e~pensive mean6 for ~ai~tai~i~g the cylindrical ~ember 0- 8 3 ~
~b~ut t~e ~rc tub~ a~d ~ou~t~ th~ ~c tube ~Lt~ ttl2 1~19p ou~c both 8 rQi~UC:~io~ ero~anca ~d ~ma~ o ~he oute~ ~velo~e. Ttlrae C03~ it~01~8 ~l~ld to be ~ ocaer to ~rr~ve ~t ~ ~olu'c~ on to ehe ~o~e~t~o~d p~oble~. ~r~ly~
5 th~ partlcular cyllna~ical ~s1a~er to b~ us¢~ ich 1~ a t~anæpar0n~ ~hi~la 02 quarlt~ ~ube~ haa ~o b~ 8acurely h@ld i~
place i~ ~uch B ma~ner 10 ghat ~ t ~d not co~e in ~o~ta~t with ~e arc tube . 8eco~dly. proper dli~tances h~d to be ~a~ ntailled bet~een tIle ~lec~ al cor~du~tors of ~ppo~ite elect~:ieal poteD.tial. ~hirdly, tltle a~c ~u~e and ~he cylindri~a~ ~ember had to be lleld s~curely in their proper ~o~itions during regular handling. A~y brea~h of th~ above ~onditio~ dould have reduced lamp perforDIance, ~lho~tened lamp lie alld ldould not have p~o~ided a perDlanent ~olutioll to preventi~g out2r envelope damage due ~o a~ aro ~ube f ~a~ture .
In ~e pre~e~t i~ve~tio~ the solutio~ to the aforemenl:ioned probleDn ~das ~ cyli~dri~al i~e1nb~r 36 positio~l d abou'c ar~ tube 28, iII t~e form of qlla~tz ~hield, i~ eo~unction v~th fraa~e a~ean~ 2~ wi~clhi~ outer envelope 12, 1~ gl~ ~ir~ lae~ber i~3 used to iEorm fra~e ~ean~ 22, t~ereby ~ inati~g the ~eed for sireldiny ltogether ~everal wires i~ order to ~or~ the f ~ame ~tructure t~a~ 6upports guartz ~hield 36 and aEc tube 28 it~elf . ~6 illu~it rated ~n the ~IBI~E, a~c tube 28 i8 parallel and ~ub6tantiall5,~ concentric to ~oth ~uartz ~hield 36 and helical por~tion 25 of ra~e ~earl6 22. Lead 32 i~ elect~ically cou~led to frame mean6 22 and lead 34 is electrically coupled to conductor lB, ~ n ~tem ~ember 14, by connector wire 40 .
In one particular em~odi~ent, a 40-watt lamp required the u~e of a quartz ~hield which had a ~dall thickne~s of ahout ~ne milli;~eter in order ~o Elrevent the di~per6ion of 6hard6 arl,d ulti~ate breakage oiE the outer emrelope . The f rame ~eans wa~
partially for~ed i~ a ltLelia~ in srder ~o allo~d t~e quartz ~hield 1~}~
E30veYe~" t~le remote po~6ibil~ty of a mi~or dis~e~6io~ oî gliil ~hard6 resu1ti{lg from a frac~cuLe of ~he pressurized 1ight-sour~e cap~ule ~e.g., arc tube) ~ontairl~d within the la~p ls a ~ub6ta~tia1 i~pediment in the ~ath of deve10ping a 25 fea~ible rep1acement in the indu~tria1 or commercia1 ~alke~.
A1though occurrence of ~uch a îracture i6 rare, ~everthe1e~, , .. ~, ~23~
~ould pre~ent a ~Eety hazard to ~ ~r~0~ o~ ob~ect ~nl t1he YiC~ity of t~e la~p ~i.e., ~oo~ pE~para~ion~0 Thersore, it woul~ bs ~ abl~ to ~vi~e a ~i~pl~ hod that woul~ ~llo~d or t~2 ~a~ u~ o~ ~uch a lalinp ill a~ ~en 5 f ixture.. ~ ~rc ~ haE~e lallnp whi~ ub~ta~t~ally ~li~inate~
tlle problem o~ ~ard di~per~io~ uRol~ t~e ~r~cture of t~e light-E~oulee cap~ule would con~tiLtu~ an advaD,~eDnent ~n t~e art .
Me~hod6 have been ~ugge6ted to improve the abllity oiE
10 ~ung6ten halogen an~ arc di~cha~ge la~p~ to with~arl~ a f~cacture ~sf ~he inn~r light-~ource cap~ule. I~ orle ~xa~ple, the shard~ are re6tricted f ~o~ impacting ~ith the outer envelope throuslh tl~e U8~ of ~ crlinddvical body di~o~ed albou~
the arc tube, U.S. Pat~llt 4,281~274, i~ued July 28, 1981 to 15 ~3e~hard ~t al. The problern wi'ch ehe a~rangement de~cri~ed i~
Bechard ~t al i~ t~lat the ~t~ucture for aou!lting both the arc - ~~ tu~e and tihe particular ~ylindri~al body is comple~ and r~guir~ ~eldiEIg 6everal ~art~ to51ethar. ~hi~ leaa~ to increas~d eo6t and ma~ufacturing diîPicultiefi durillg ~he 20 process o~ ~a~i~g ~uch a lamp.
It i~ believedd herfi~fore, that an glec~ic la~ap ~b.at provi~e6 for a siD~ple and ineacpenhive ~eans or ~ounting a~ ar~
tube a~d preverlti~g shard dispersion upo~ a~ ar~ tube f ractllre, and ~ould al~o ~ver~ome the otlher di~adva~'cages as~ociated ~ith 25 the prior art devices mentioned abo-.re, ~ould CoEISti~ute a signif i~ant adva~er~ent in the art .
lDISCLOSllRE OF THE IN~NTICIN
, there~oreO a primary obj~ctive oiE thi~ inven~ioal ~o overcome the di~advaneage6 of the prior art deYice6 ~u~ a~
30 mentio~ed above.
'I ~
It ~ a~otber ob~@~t o t~is ~ve~io~ to ~rovide elec~r~c la~p ~hic~ ~ill ~u~st~nt4ally ~liainate th2 pos~ibility o~ ~nor ~ard al~per~iorl upo~ r~ctu~ of ~
pre~surized light-~ource cap~ule ~t ~ pl~l3 an~ pe~ re 5 to manuf~c~ure.
Another ob~ect of tll~s il~Yention i~ to ~rovide ~ea~ for ~up~orting a light-~ource capsule a:~d ~o~ta~ent s~ans about the ca~sule wh~ch will cau6e li~tle or ~o 10~8 oiE 1UD~ >U6 efficacy in lamps utiliæing such meanB.
11l accordance with one a~pect of the present inventiorl, theEe is provi 31ed a~ imp~oved metal hal~le discb.a~ge lamp of the type h~ving an outer envelope, a ~te~ ~ember located withir t~e outer envelope ~a~ing a pair of ele~t~i~al conductors extending ther~f Io~ alld a ~ame ~ean6 lo~a~ed ~it~in the outer 15 envelop2 an~ supported by one of the elec~ical co~ductor~.
~he la~np al60 include~ an arc tube, su~por~ced by a~d ele~trically ~oupled to the f~ame ~eans, havin~ a ~heluical fill in~luding a sod~u~ ~alide. Tlhe arc tube ha~ a pai~ of elec~rical l~ad~ ~ealed in~ ~nd pa~ g ~h~ough at lf~a8t one 20 end thereof ~v provid~ a pair oî electrode~ t~erein. P.
cylindrical ~embe~ i~ al~o in~luded in lthe la~p ~dhi~h i~
supported by t~e îra~e ~aeans and surround6 the ar~ tube. The impro~remeIlt in the la~p lies ~rith tihe f rame ~ea~s whi~h co~pri~es a 6ingle wire D~e~nber ~ having ~ particular 25 conf iguration. which ~upport6 the arc tube withi~ e lamp and fixedly z~aintain~ t~e cylind~ical ~ember about the arc tube.
The frame means e:~tend~ aloag a~l a~lCi6 6ubstan~ially parallel to the longitudi~al a~i~ of the lamp.
~Z39~70 D-8~ 065 B~ DE~ aIlP~I0~3 O~ 1~ D~NI~!t:
Th~ PIGUP.12 ~llustrate~ 0-a2 ~ o~i~en~ of tZtle ~et~ lide la~p ~ade ir~ a~co2~a~lce d~th t~e teaclli~gs of th~ lpre~e~
inve~t io~ .
BI~T ~ODE FO~ CARE~YING OUT THE~ NTION
For ~ better llnd~r~tanding o~ the prese~t ~ ~ventio~, toget~er ~dith otlher ~nd u~the~ ob~ect~, advanea~e~, a~d capabilitie~ ther~of, ~ef2re~ce i8 !aadg ~0 the fsllowl~g di~clo~ure aIId appended claim6 in ~on3unction w~th the above deE;clibed dra~;~g.
A~ u~ed h@reil~O t~e term "lighe-sou~ce ~ap6ule" denot~:
-- an arc tube of an arc di~charge lamp, or any li~ t emitting cap6ule withi~ the outer enYelope of the lam~ wher~ che lig~ ource cap6ule op~rates at a pre6~ure ot~er t~ar a~mo~;pheric and t~e ~06~;:ibililt,y oiE ~i~or ~hard di~pe~ion upo~
fracture of the ligh~-~ource cap6ule QXi8tS.
~eferring no~ lco the dra~ g ~ith greater parlcicularity, the FI~:UE~E show~ a metal Ihalide lamp 10 ~ade in ac~o~dance with the t2achin~s of tlhe pre~ent invention. ~etal kaalid* dischar~e lamp lO include~ all evacua~ed nu~er envelope 12, ~b,ieh i~
hermetically ~aaled t~ a gla6s stem meE~ber 14, and an e~cte~al base 16. Ba~e 16 i6 îormed for ea~y ~onnectio~ ~o a~l electrlcal ~ource and i6 affixed to the hermetically ~eal~d ~tem ~ember 14 and outer e~velope 12. A pair of electrical conduc~ors 18 and 20 are ~ealed i~to and pa~s through s~te~
nember 14 and are electri cally connected to ba~e 16, e~cternal of outer e~velope 12 ~ to provide accefis f or energiza~ion of dischalge lamp 10.
:~23~70 D-~3-1-û6~
Yacua~a ~u~er ~v~ 12 ~le~ al ~n~ or 20 ~ g~ sn~u~t~Y~ ~r~e s~2an~ 2~. Fram2 g3~an~ 22 ~xtena~ alo~ a~is $ub~ ti~1îy parallel ~o ~he long~tud~al a~is o~ c~arge laD~p 10 ~d 5 include~ a ~r~ular portio~ ol?~rae~r0 co~t~et ~ n upper~os~t ~or~ion 23 of ou'ce~ ~nvelop~ 1;tD ~al heli~al portio~ 25 and a sub6tant~ally ~traight p~rtio~ 26. Circular po~t~on 24, in conjunction with the uppers~o6t po~tion 23, and 8~ embe~
14 ~erve the au~l ~unction o~ ~aintaining ~rame ~ea~6 22 in pr~per align~e~ and ~e6i6~ing defor~atio~ due ~o e~ternal shoc~ to discharge lamp 10.
Di~po6ed ~ithin ou~er e~velope 12 18 a ~yl1~drical ~ember 36, whic~ may ~e i~ the or~ of a quar~2 ~leeve or shield.
~hic~ upport~d by fra~e ~eans 22. Al~o ~uppor~ed by ~Eame ~eans 22 ~nd contaîned within quartz ~hield ~6 i~ an arc tub~
28. Arc tube 2B ha8 a ~hemical ~ill includi~g a Rodiu~ ~al~d~
~nd electrodes 29 a~d 30 at o~e end t~e~eo. ~oreo~et, ~lectlode 29 i~ mechanically and el~c ~ieally con~ected to fra~e ~ean6 22 t~r~ugh an ~lectrical lead 32 whil2 elec~ode 30 î6 affi~d to a~ ~leetri~al lsad 34 ~hi~h pa6~ æ above a po~tion of ~ylindri~al ~ber 36 and ~æ ele~t~ically and ~echa~ically connected to electrical connector 18 by a con~ector ~ire 40. ~ire 40 i8 preferably ~ade of ~olybdenum.
Cylindrieal member 36 i6 lo~a~ed with~n and i8 ~upporeed by ~elic~l por~ion Z5 of f~ame mean6 22. Cylindrical ~ember 36 i~
~ecured in frame ~ean6 2~ by a b~d 21 and a s~all nickel wire 38 which i6 ~elded to the upper most pa~t o~ said strai~ht portio~ 26 of frame ~ea~s 22. A small ~iRk o~ bend i~ the upper~o~t part of ~traig~t portion Z6 ~ay be ~ubstituted ~or ~ire 3~ in ~ecuring cylindrical ~ember 36 in ~06i~io~.
The purpo6e of the ~re~ent inventio~ i6 ~0 provide a ~imple and i~e~pensive mean6 for ~ai~tai~i~g the cylindrical ~ember 0- 8 3 ~
~b~ut t~e ~rc tub~ a~d ~ou~t~ th~ ~c tube ~Lt~ ttl2 1~19p ou~c both 8 rQi~UC:~io~ ero~anca ~d ~ma~ o ~he oute~ ~velo~e. Ttlrae C03~ it~01~8 ~l~ld to be ~ ocaer to ~rr~ve ~t ~ ~olu'c~ on to ehe ~o~e~t~o~d p~oble~. ~r~ly~
5 th~ partlcular cyllna~ical ~s1a~er to b~ us¢~ ich 1~ a t~anæpar0n~ ~hi~la 02 quarlt~ ~ube~ haa ~o b~ 8acurely h@ld i~
place i~ ~uch B ma~ner 10 ghat ~ t ~d not co~e in ~o~ta~t with ~e arc tube . 8eco~dly. proper dli~tances h~d to be ~a~ ntailled bet~een tIle ~lec~ al cor~du~tors of ~ppo~ite elect~:ieal poteD.tial. ~hirdly, tltle a~c ~u~e and ~he cylindri~a~ ~ember had to be lleld s~curely in their proper ~o~itions during regular handling. A~y brea~h of th~ above ~onditio~ dould have reduced lamp perforDIance, ~lho~tened lamp lie alld ldould not have p~o~ided a perDlanent ~olutioll to preventi~g out2r envelope damage due ~o a~ aro ~ube f ~a~ture .
In ~e pre~e~t i~ve~tio~ the solutio~ to the aforemenl:ioned probleDn ~das ~ cyli~dri~al i~e1nb~r 36 positio~l d abou'c ar~ tube 28, iII t~e form of qlla~tz ~hield, i~ eo~unction v~th fraa~e a~ean~ 2~ wi~clhi~ outer envelope 12, 1~ gl~ ~ir~ lae~ber i~3 used to iEorm fra~e ~ean~ 22, t~ereby ~ inati~g the ~eed for sireldiny ltogether ~everal wires i~ order to ~or~ the f ~ame ~tructure t~a~ 6upports guartz ~hield 36 and aEc tube 28 it~elf . ~6 illu~it rated ~n the ~IBI~E, a~c tube 28 i8 parallel and ~ub6tantiall5,~ concentric to ~oth ~uartz ~hield 36 and helical por~tion 25 of ra~e ~earl6 22. Lead 32 i~ elect~ically cou~led to frame mean6 22 and lead 34 is electrically coupled to conductor lB, ~ n ~tem ~ember 14, by connector wire 40 .
In one particular em~odi~ent, a 40-watt lamp required the u~e of a quartz ~hield which had a ~dall thickne~s of ahout ~ne milli;~eter in order ~o Elrevent the di~per6ion of 6hard6 arl,d ulti~ate breakage oiE the outer emrelope . The f rame ~eans wa~
partially for~ed i~ a ltLelia~ in srder ~o allo~d t~e quartz ~hield 1~}~
3 ~ 5 ts be ~ r~e~ gce~ly ~n~ l?U8~19 U~ ~0 eouc~ ~e ~0~d â~ ~ba ~ra~e ~ea~s (~ t~e ~IGU~. T~e l~t~ of lc~l@ ~ IIIe ~aean~
was about 95 ~ net~r~ ~). The ~lical poFt~o~ ~ra~ ~bout 30 ~ le~th ~ had ~n avera~e a~asle~I o abou~
5 add~tioll, t~e lea~th oî the quart~ ~hield ~as ~bout 3~ ~ a~
t~ ~iala~tar wa~ abvut 1~ un.
I~ laboratory te~t~ of the 40-~att ~aetal halide la~p, purposely ~nduce~ f ractures o arc tube 20i~ the la~p~ proved that quartz ~hi~ld 36, ~ th the ol~e milli~eter ~dall th~skne~s, 10 ~a~ suf f icient to preve~t glas~ ~hards f rom damaging outer ~n~relope 12. Cyli~drical ~e~be~ 36 ~ay al~ be ~ade of other ~aterial6 suitable for with~tallding shard i~pact (i.e., 3hard gla6~). Additional tes~i~g $howe~ tllat the u~e of quartz tubing and the ~el~al fra~ne had a n~gligible effec~ on lamp 15 perfo~ance and lamp life. Other 6i~ilar ~ype lamp6 ~a~ be made ~axd-di~per~ion-~roof by ~arying the diametel of the helical ~rame a~d the t~icJcnes~ of t~e qua~tz ~hield.
Thll6~ ~here ha~ been ~ho~ and de~c~ibed an ~ roved ~etal halide lamp that provide~ f2a~e ~ean~ ther~i~ for ~ounti~g a 20 ar~ tube and f i~edly ~aai~ai~ g a cyli~drical ~e~ber about t~
arc tube ~hish will prevent ~hard di~er~ion upo~ a fca~tule o the a~c tl~be ~t6elf. ~qore parti~ularly, frame ~eans is provided in the for~n of a single wire lae~ber, whi~h i~ par211el to tlle lo~gitudinal axis o~E the la~p, t~at ~ill ~e~ve to ~5 ~;up~ort the arc tube and the cyl~dri~al ~ember about t~e arc tube, ~he~eby ~i~pl~Eying and lowering the ~o~t o~ alaking ~uch a lamp.
~ hile thele have been sho~n ~hat are at pre~ent ~co be the ~referred e~bodiD~ent6 of t~e i~vention, it ~ill be apparen~ ~o 30 tho~e 6killed i~ t~e ~rt t~lat variou6 change6 ar~d ~difications ~an be made ~e~ein ~rit~out depar~ing ~rom the ~ope of ehe ~nvention as def ined in the appended claim6 .
was about 95 ~ net~r~ ~). The ~lical poFt~o~ ~ra~ ~bout 30 ~ le~th ~ had ~n avera~e a~asle~I o abou~
5 add~tioll, t~e lea~th oî the quart~ ~hield ~as ~bout 3~ ~ a~
t~ ~iala~tar wa~ abvut 1~ un.
I~ laboratory te~t~ of the 40-~att ~aetal halide la~p, purposely ~nduce~ f ractures o arc tube 20i~ the la~p~ proved that quartz ~hi~ld 36, ~ th the ol~e milli~eter ~dall th~skne~s, 10 ~a~ suf f icient to preve~t glas~ ~hards f rom damaging outer ~n~relope 12. Cyli~drical ~e~be~ 36 ~ay al~ be ~ade of other ~aterial6 suitable for with~tallding shard i~pact (i.e., 3hard gla6~). Additional tes~i~g $howe~ tllat the u~e of quartz tubing and the ~el~al fra~ne had a n~gligible effec~ on lamp 15 perfo~ance and lamp life. Other 6i~ilar ~ype lamp6 ~a~ be made ~axd-di~per~ion-~roof by ~arying the diametel of the helical ~rame a~d the t~icJcnes~ of t~e qua~tz ~hield.
Thll6~ ~here ha~ been ~ho~ and de~c~ibed an ~ roved ~etal halide lamp that provide~ f2a~e ~ean~ ther~i~ for ~ounti~g a 20 ar~ tube and f i~edly ~aai~ai~ g a cyli~drical ~e~ber about t~
arc tube ~hish will prevent ~hard di~er~ion upo~ a fca~tule o the a~c tl~be ~t6elf. ~qore parti~ularly, frame ~eans is provided in the for~n of a single wire lae~ber, whi~h i~ par211el to tlle lo~gitudinal axis o~E the la~p, t~at ~ill ~e~ve to ~5 ~;up~ort the arc tube and the cyl~dri~al ~ember about t~e arc tube, ~he~eby ~i~pl~Eying and lowering the ~o~t o~ alaking ~uch a lamp.
~ hile thele have been sho~n ~hat are at pre~ent ~co be the ~referred e~bodiD~ent6 of t~e i~vention, it ~ill be apparen~ ~o 30 tho~e 6killed i~ t~e ~rt t~lat variou6 change6 ar~d ~difications ~an be made ~e~ein ~rit~out depar~ing ~rom the ~ope of ehe ~nvention as def ined in the appended claim6 .
Claims (9)
1. An improved metal halide discharge lamp of the type having an outer envelope, a stem member located within said outer envelope having a pair of electrical conductors extending therefrom, frame means located within said outer envelope and supported by one of said electrical conductors, and arc tube supported by and electrically coupled to said frame means having a chemical fill including a sodium halide, said arc tube having a pair of electrical leads sealed into and passing through at least one end thereof to provide a pair of electrodes therein and a cylindrical member supported by said frame means and surrounding said arc tube, the improvement wherein said frame means comprises:
a single wire member, having a particular configuration, which supports said arc tube within said lamp and fixedly maintains said cylindrical member about said arc tube, said frame means extending along an axis substantially parallel to the longitudinal axis of said lamp.
a single wire member, having a particular configuration, which supports said arc tube within said lamp and fixedly maintains said cylindrical member about said arc tube, said frame means extending along an axis substantially parallel to the longitudinal axis of said lamp.
2. The improvement according to Claim 1 wherein said particular configuration of said frame means comprises a small circular portion, a helical portion and a substantially straight portion, said circular portion being in operative contact with said outer envelope and said straight portion having means for securing said cylindrical member is position.
3. The improvement according to Claim 2 wherein said means for securing said cylindrical member includes a small wire welded to said straight portion of said frame means.
4. The improvement according to Claim 1 wherein said cylindrical member is a quartz sleeve that prevents shard dispersion upon a fracture of said arc tube.
5. The improvement according to Claim 4 wherein said quartz shield has a wall thickness of about 1 millimeter for a 40-watt lamp.
6. The improvement according to Claim 4 wherein said arc tube is parallel and substantially concentric to said quartz shield and said helical portion of said frame means, one of said electrical leads of said arc tube is electrically coupled to said frame means and other of said electrically leads is electrically coupled to an electrical conductor in said stem member by a connector wire.
7. The improvement according to Claim 3 wherein said small wire is made of nickel.
8. The improvement according to Claim 6 wherein said connector wire is made of molybdenum.
9. The improvement according to Claim 1 wherein said cylindrical member is hardglass sleeve.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US68734184A | 1984-12-28 | 1984-12-28 | |
| US687,341 | 1984-12-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1239970A true CA1239970A (en) | 1988-08-02 |
Family
ID=24760071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000497535A Expired CA1239970A (en) | 1984-12-28 | 1985-12-12 | Metal halide lamp with arc tube shield support |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0186899B1 (en) |
| JP (1) | JPS61161647A (en) |
| CA (1) | CA1239970A (en) |
| DE (1) | DE3583665D1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5532543A (en) * | 1991-12-23 | 1996-07-02 | Philips Electronics North America Corporation | High density discharge lamp with pinched-on containment shield |
| EP0549056B1 (en) * | 1991-12-23 | 1996-05-22 | Koninklijke Philips Electronics N.V. | Electric discharge lamp |
| DE4317252C1 (en) * | 1993-05-24 | 1994-05-05 | Blv Licht & Vakuumtechnik | Gas discharge lamp - has breakage protection provided by grid incorporated in transparent envelope enclosing discharge vessel |
| US5493167A (en) * | 1994-05-03 | 1996-02-20 | General Electric Company | Lamp assembly with shroud employing insulator support stops |
| US6153968A (en) * | 1998-10-02 | 2000-11-28 | Philips Electronics North America Corp. | Metal halide lamp with stem mounted support frame for arc tube shield |
| US6329742B1 (en) * | 1999-06-02 | 2001-12-11 | Philips Electronics North America Corp. | Metal halide lamp with metal frame supporting a protective sleeve |
| US6291933B1 (en) * | 1999-09-24 | 2001-09-18 | Philips Electronics North America Corporation | Metal halide lamp with ARC tube secured to frame by clips passing through protective sleeve |
| US6741013B2 (en) * | 2000-12-13 | 2004-05-25 | General Electric Company | Shrouded electric lamp having functionally distinguishable center supports |
| US6844676B2 (en) | 2001-10-01 | 2005-01-18 | Koninklijke Philips Electronics N.V. | Ceramic HID lamp with special frame wire for stabilizing the arc |
| US7852004B2 (en) * | 2007-06-06 | 2010-12-14 | General Electric Company | Ignition aid and fitting shroud for discharge lamp |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB489925A (en) * | 1937-05-21 | 1938-08-05 | British Thomson Houston Co Ltd | Improvements in and relating to electric discharge lamps |
| GB737913A (en) * | 1951-06-01 | 1955-10-05 | Gen Electric Co Ltd | Improvements in or relating to high pressure mercury vapour electric discharge lamps |
| US3218495A (en) * | 1962-12-06 | 1965-11-16 | Westinghouse Electric Corp | Arc tube mount and component therefor |
| US3250934A (en) * | 1963-11-22 | 1966-05-10 | Sylvania Electric Prod | Electric discharge device having heat conserving shields and sleeve |
| US4281274A (en) * | 1979-08-01 | 1981-07-28 | General Electric Co. | Discharge lamp having vitreous shield |
| US4625141A (en) * | 1984-10-29 | 1986-11-25 | Gte Products Corporation | Low wattage metal halide discharge lamp electrically biased to reduce sodium loss |
-
1985
- 1985-12-12 CA CA000497535A patent/CA1239970A/en not_active Expired
- 1985-12-23 EP EP19850116518 patent/EP0186899B1/en not_active Expired
- 1985-12-23 DE DE8585116518T patent/DE3583665D1/en not_active Expired - Fee Related
- 1985-12-25 JP JP29094285A patent/JPS61161647A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0186899A2 (en) | 1986-07-09 |
| DE3583665D1 (en) | 1991-09-05 |
| EP0186899B1 (en) | 1991-07-31 |
| JPS61161647A (en) | 1986-07-22 |
| EP0186899A3 (en) | 1988-10-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1239970A (en) | Metal halide lamp with arc tube shield support | |
| CN100573805C (en) | Metal halide lamp and the lighting device that has used this lamp | |
| US6741013B2 (en) | Shrouded electric lamp having functionally distinguishable center supports | |
| EP1033742B1 (en) | Arc tube, mounting member and electric lamp assembly | |
| JP2007273336A (en) | Fluorescent lamp | |
| US4707636A (en) | High pressure sodium vapor lamp with PCA arc tube and end closures | |
| EP2187428A1 (en) | Metal halide lamp | |
| US4704093A (en) | High pressure sodium vapor lamp with improved ceramic arc tube | |
| US3855494A (en) | Ceramic arc lamp construction | |
| EP0180199B1 (en) | Low wattage metal halide discharge lamp | |
| US5019743A (en) | Mount structure for double ended lamp | |
| DE19722601A1 (en) | Electric lamp system e.g. for metal halide arc discharge lamp | |
| JPH09167599A (en) | Double-tube type incandescent lamp | |
| JPH08106882A (en) | Lamp provided with improvement mount for light source capsule | |
| JPS6329940B2 (en) | ||
| US3409790A (en) | Arc tube mounting | |
| US6858976B2 (en) | Spring-clip for hid lamp | |
| US20060175948A1 (en) | Shroud holder for quartz and ceramic arc tubes | |
| US7839066B2 (en) | Strengthened arc discharge lamp | |
| US6737791B2 (en) | Snap-on spring clip for ceramic hid lamp | |
| US8519605B2 (en) | Metal vapor discharge lamp and lighting apparatus | |
| GB1594976A (en) | High pressure electric discharge lamps | |
| EP1772888A2 (en) | Arc tube and shroud holder | |
| US20070080620A1 (en) | Arc tube and shroud holder | |
| CA1246132A (en) | Electrode positioning in metal halide lamps |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |