JPS6224900B2 - - Google Patents
Info
- Publication number
- JPS6224900B2 JPS6224900B2 JP55093189A JP9318980A JPS6224900B2 JP S6224900 B2 JPS6224900 B2 JP S6224900B2 JP 55093189 A JP55093189 A JP 55093189A JP 9318980 A JP9318980 A JP 9318980A JP S6224900 B2 JPS6224900 B2 JP S6224900B2
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- outer coil
- pressure sodium
- arc tube
- lamp
- 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
- 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 claims description 19
- 229910052708 sodium Inorganic materials 0.000 claims description 19
- 239000011734 sodium Substances 0.000 claims description 19
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 239000000941 radioactive substance Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 description 9
- 239000007772 electrode material Substances 0.000 description 4
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 229910052788 barium Inorganic materials 0.000 description 3
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 3
- 229910052753 mercury Inorganic materials 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 239000003870 refractory metal Substances 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052724 xenon Inorganic materials 0.000 description 2
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 2
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 1
- 229910052776 Thorium Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 239000012857 radioactive material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002195 soluble material Substances 0.000 description 1
- WLTSUBTXQJEURO-UHFFFAOYSA-N thorium tungsten Chemical compound [W].[Th] WLTSUBTXQJEURO-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/24—Means for obtaining or maintaining the desired pressure within the vessel
- H01J61/26—Means for absorbing or adsorbing gas, e.g. by gettering; Means for preventing blackening of the envelope
Landscapes
- Discharge Lamp (AREA)
Description
【発明の詳細な説明】
本発明は高圧ナトリウムランプにかかり、動程
中における管電圧の上昇が少なく、長寿命のラン
プを提供しようとするものである。DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a high-pressure sodium lamp, and an object thereof is to provide a lamp with a long life and a small increase in tube voltage during stroke.
高圧ナトリウムランプは、高圧水銀ランプなど
に比べて約２倍のランプ効率がえられ、エネルギ
ー節約上大きな利点を有している。 High-pressure sodium lamps have about twice the lamp efficiency as high-pressure mercury lamps, and have a great advantage in energy saving.
しかしながら、かかる高圧ナトリウムランプは
動程中にランプ電圧が上昇し、最終的にランプを
消えに至るという大きな問題がある。このランプ
電圧の上昇は主として次のような原因によるもの
である。すなわち、電極物質が飛散、蒸発して電
極近傍の発光管管壁が黒化する結果、発光管の最
冷点温度が上昇する。このため、飽和蒸気圧形放
電ランプである高圧ナトリウムランプでは、管内
蒸気圧が上昇してランプ電圧の上昇をまねくこと
による。 However, such high pressure sodium lamps have a major problem in that the lamp voltage increases during the stroke, eventually leading to the lamp extinguishing. This increase in lamp voltage is mainly due to the following causes. That is, the electrode material scatters and evaporates, causing the wall of the arc tube near the electrode to turn black, resulting in an increase in the temperature of the coldest point of the arc tube. For this reason, in high-pressure sodium lamps that are saturated vapor pressure discharge lamps, the vapor pressure inside the tube increases, leading to an increase in lamp voltage.
この電極物質の飛散、蒸発は電極構造および電
子放射性物質によるところが大きいが、発光管内
に残留せる不純ガスの量によつても左右される。 This scattering and evaporation of the electrode material largely depends on the electrode structure and the electron radioactive material, but it also depends on the amount of impure gas remaining in the arc tube.
本発明はかかる不純ガスを極力抑制することに
より、電極物質の飛散、蒸発を少なくし、長寿命
の高圧ナトリウムランプを実現することを目的と
する。 An object of the present invention is to reduce the scattering and evaporation of electrode materials by suppressing such impure gases as much as possible, thereby realizing a long-life high-pressure sodium lamp.
以下、本発明の一実施例について、図面を用い
て説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第１図は高圧ナトリウムランプの発光管の断面
構造であって、１は多結晶アルミナまたは単結晶
アルミナからなる透光性の発光管で、その両端部
にはエンドキヤツプ２，３がセメント（図示せ
ず）により気密に封着されている。さらにエンド
キヤツプ２，３を通してニオブ管からなる導入体
４，５がセメント（図示せず）により気密に封着
されている。導入体４，５の先端には後述するよ
うな電極６，７が付設されている。発光管１内に
はナトリウム３〜20mgと、点灯中に蒸発して緩衝
ガスとなる水銀10〜70mgもしくはカドミウム15〜
80mg、始動補助用希ガスとしてのキセノンまたは
ネオンを主体としたペニングガス10〜400Torrが
封入されている。電極６，７は、第２図ａ，ｂに
拡大して示すように、タングステンまたはトリウ
ムタングステンよりなる電極心棒８に、タンタル
などのゲツタ作用を有する難溶性金属線からなる
コイル９を導入体側で２〜４巻密着させて巻回
し、中央部位で電極心棒８から一定の間隔を保つ
て巻回して、電極心俸８と外側コイル９との間に
空間を形成したものである。なお、電極心棒８の
先端は外側コイル９の先端より１〜４mm突出して
いる。また、外側コイル９の内面と電極心棒８と
の間に形成された空間には、あらかじめバリウ
ム、アルミニウム、カルシウムなどの酸化物、ま
たはバリウム、カルシウム、トリウムなどの酸化
物からなる電子放射性物質を付着せしめたタンタ
ルなどの、ゲツタ作用を有する難溶性金属細線よ
りなる３重の内側コイル１０が完全に挿入されて
いる。そして、外側コイル９の先端部を内側に折
曲げて、電極心棒８と外側コイル９との間の開口
部分をふさぎ、電子放射性物質が放電中に極力さ
らさないようにする。これは、同時に挿入した内
側コイル１０を保持する役目をはたす。 Figure 1 shows the cross-sectional structure of the arc tube of a high-pressure sodium lamp. 1 is a translucent arc tube made of polycrystalline alumina or single crystal alumina, and end caps 2 and 3 are attached to cement (Fig. (not shown). Furthermore, introducers 4 and 5 made of niobium tubes are passed through the end caps 2 and 3 and hermetically sealed with cement (not shown). Electrodes 6 and 7 as described later are attached to the tips of the introducers 4 and 5. The arc tube 1 contains 3 to 20 mg of sodium and 10 to 70 mg of mercury or 15 to 70 mg of cadmium, which evaporates during lighting and becomes a buffer gas.
It contains 80 mg and 10 to 400 Torr of Penning gas, mainly consisting of xenon or neon, as a rare gas for starting aid. As shown enlarged in FIGS. 2a and 2b, the electrodes 6 and 7 have an electrode core 8 made of tungsten or thorium tungsten, and a coil 9 made of a refractory metal wire such as tantalum having a getter action on the introduction body side. Two to four turns are wound in close contact with each other, and are wound at a constant distance from the electrode core 8 at the center to form a space between the electrode core 8 and the outer coil 9. Note that the tip of the electrode mandrel 8 protrudes from the tip of the outer coil 9 by 1 to 4 mm. Further, in the space formed between the inner surface of the outer coil 9 and the electrode mandrel 8, an electron radioactive substance made of an oxide such as barium, aluminum, or calcium, or an oxide such as barium, calcium, or thorium is adhered in advance. A triple inner coil 10 made of thin wires of a sparingly soluble metal with a getter action, such as tantalum, is completely inserted. Then, the tip of the outer coil 9 is bent inward to close the opening between the electrode mandrel 8 and the outer coil 9 to prevent exposure of the electron radioactive substance during discharge as much as possible. This serves to hold the inner coil 10 inserted at the same time.
なお、ゲツタ作用を有する難溶性金属は外側コ
イル９または内側コイル１０の少なくとも一方に
使用すればよい。 Incidentally, a hardly soluble metal having a getter effect may be used for at least one of the outer coil 9 and the inner coil 10.
また、電極心棒は内側コイルの先端より引込ん
だものでもよい。 Further, the electrode mandrel may be retracted from the tip of the inner coil.
以上のような構成によれば、電極の外側コイル
９および内側コイル１０のうち少なくとも一方に
ゲツタ作用を有する難溶性金属を用いているの
で、発光管１内に残留していた不純ガスがこの金
属に吸着され、これによって電極物質の飛散、蒸
発が抑制される結果、ランプ電圧の上昇も抑制さ
れて長寿命の高圧ナトリウムランプが得られる。 According to the configuration described above, since at least one of the outer coil 9 and the inner coil 10 of the electrode is made of a refractory metal having a getter effect, the impurity gas remaining in the arc tube 1 is absorbed by this metal. This suppresses the scattering and evaporation of the electrode material, thereby suppressing the rise in lamp voltage, resulting in a long-life high-pressure sodium lamp.
次に、本発明の具体的な例について説明する。 Next, a specific example of the present invention will be described.
内径7.5mm、全長116mmの多結晶アルミナ管を発
光管１とし、同管内にナトリウム4.3mg、水銀
15.7mgおよびキセノンガス350Torrを封入した。
電極の電極心棒８は直径1.2mmのタングステン線
よりなる。また外側コイル９は直径0.6mmのタン
タル線で構成されていて、電極心棒８に密着して
巻付けた部分が３巻であり、電極心棒８との間に
形成する部分は最小半径が2.7mmで18巻よりな
る。なお、電極心棒８の先端は外側コイル９の先
端より２mm突出させておいた。内側コイル１０
は、直径40μｍのタンタルの細線よりなる３重コ
イルである。バリウム、カルシウム、ナトリウム
などの酸化物からなる電子放射性物質を、内側コ
イル１０の空隙および表面上に付着せしめたの
ち、この内側コイル１０を電極心棒８と外側コイ
ル９との間に形成した空間に完全に挿入し、外側
コイル９の先端部を折り曲げて、電極心棒８と外
側コイル９との間の開口部分を一部おおい、電子
放射性物質を放電中にさらさないようにした。 Arc tube 1 is a polycrystalline alumina tube with an inner diameter of 7.5 mm and a total length of 116 mm, and 4.3 mg of sodium and mercury are contained in the tube.
15.7 mg and 350 Torr of xenon gas were sealed.
The electrode core 8 of the electrode is made of a tungsten wire with a diameter of 1.2 mm. The outer coil 9 is made of tantalum wire with a diameter of 0.6 mm, and the part wound closely around the electrode mandrel 8 has three turns, and the part formed between it and the electrode mandrel 8 has a minimum radius of 2.7 mm. It consists of 18 volumes. Note that the tip of the electrode mandrel 8 was made to protrude 2 mm from the tip of the outer coil 9. inner coil 10
is a triple coil made of fine tantalum wire with a diameter of 40 μm. After depositing an electron radioactive substance made of oxides such as barium, calcium, and sodium on the void and surface of the inner coil 10, the inner coil 10 is inserted into the space formed between the electrode mandrel 8 and the outer coil 9. After it was completely inserted, the tip of the outer coil 9 was bent to partially cover the opening between the electrode mandrel 8 and the outer coil 9, so as not to expose the electron radioactive substance during discharge.
かかる高圧ナトリウムランプを360Wで点灯し
て試験したところ、20000時間の点灯後もランプ
電圧の上昇が平均4Vと小さく、また発光管管端
部内壁に生じる黒化も、ゲツタ作用を有しない難
溶性金属を使用した電極を備えた従来の高圧ナト
リウムランプのそれよりも小さかった。 When we tested this high-pressure sodium lamp by lighting it at 360W, we found that even after 20,000 hours of lighting, the rise in lamp voltage was as small as 4V on average.Also, the blackening that occurred on the inner wall of the end of the arc tube was caused by a poorly soluble material that did not have a bulging effect. It was smaller than that of conventional high-pressure sodium lamps with metal electrodes.
以上説明したように、本発明は、両端部に電極
を有する透光性発光管内に、ナトリウム、緩衝ガ
ス用金属および始動用希ガスを封有してなる高圧
ナトリウムランプにおいて、前記電極が電極心棒
を取り巻き電子放射性物質を付着せしめた内側基
体と、前記内側基体を取り巻く外側コイルとから
なり、前記内側基体および前記外側コイルのうち
少なくとも一方がゲツタ作用を有する金属を用い
ることにより、動程中のランプ電圧上昇の少ない
長寿命の高圧ナトリウムランプを得ることができ
る。 As explained above, the present invention provides a high-pressure sodium lamp in which sodium, a buffer gas metal, and a starting rare gas are sealed in a translucent arc tube having electrodes at both ends. an inner base to which an electron radioactive substance is attached, and an outer coil surrounding the inner base, and at least one of the inner base and the outer coil is made of a metal having a getter action, so that A long-life high-pressure sodium lamp with little increase in lamp voltage can be obtained.
第１図は本発明の高圧ナトリウムランプの発光
管の一例を示す縦断面図、第２図ａ，ｂはそれぞ
れ同電極の一例を示す側面図および一部切欠断面
正面図である。
１……発光管、２，３……エンドキヤツプ、
４，５……導電体、６，７……電極、８……電極
心棒、９……外側コイル、１０……内側基体。
FIG. 1 is a longitudinal sectional view showing an example of the arc tube of the high-pressure sodium lamp of the present invention, and FIGS. 2a and 2b are a side view and a partially cutaway sectional front view, respectively, showing an example of the same electrode. 1... Arc tube, 2, 3... End cap,
4, 5... Conductor, 6, 7... Electrode, 8... Electrode mandrel, 9... Outer coil, 10... Inner base.
Claims (1)
トリウム、緩衝ガス用金属および始動補助用希ガ
スを封入してなる高圧ナトリウムランプにおい
て、前記電極が、電極心棒を取り巻き電子放射性
物質を付着せしめた内側基体と、前記内側基体を
取り巻く外側コイルとからなり、前記内側基体お
よび前記外側コイルのうち少なくとも一方がゲツ
タ作用を有する金属からなることを特徴とする高
圧ナトリウムランプ。1. A high-pressure sodium lamp in which sodium, a metal for buffer gas, and a rare gas for starting aid are sealed in a permeable arc tube having electrodes at both ends, in which the electrodes surround an electrode core and have an electron radioactive substance attached thereto. A high-pressure sodium lamp comprising an inner base body and an outer coil surrounding the inner base body, wherein at least one of the inner base body and the outer coil is made of a metal having a getter action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9318980A JPS5717554A (en) | 1980-07-07 | 1980-07-07 | High pressure sodium lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9318980A JPS5717554A (en) | 1980-07-07 | 1980-07-07 | High pressure sodium lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5717554A JPS5717554A (en) | 1982-01-29 |
| JPS6224900B2 true JPS6224900B2 (en) | 1987-05-30 |
Family
ID=14075625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9318980A Granted JPS5717554A (en) | 1980-07-07 | 1980-07-07 | High pressure sodium lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5717554A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5649187A (en) * | 1979-09-26 | 1981-05-02 | Shigeru Murakoshi | Sewing machine with meandering controller |
| JPS57166193A (en) * | 1981-04-03 | 1982-10-13 | Shigeru Murakoshi | Sewing machine with controller for position of sewing |
| US4620129A (en) * | 1985-04-29 | 1986-10-28 | General Electric Company | Gettered high pressure sodium lamp |
| JP2551223Y2 (en) * | 1991-11-21 | 1997-10-22 | 矢野 弘 | Sewing machine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53101874A (en) * | 1977-02-18 | 1978-09-05 | Hitachi Ltd | High pressure sodium lamp |
-
1980
- 1980-07-07 JP JP9318980A patent/JPS5717554A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53101874A (en) * | 1977-02-18 | 1978-09-05 | Hitachi Ltd | High pressure sodium lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5717554A (en) | 1982-01-29 |
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