JPH0762993B2 - Metal halide lamp - Google Patents
Metal halide lampInfo
- Publication number
- JPH0762993B2 JPH0762993B2 JP62234767A JP23476787A JPH0762993B2 JP H0762993 B2 JPH0762993 B2 JP H0762993B2 JP 62234767 A JP62234767 A JP 62234767A JP 23476787 A JP23476787 A JP 23476787A JP H0762993 B2 JPH0762993 B2 JP H0762993B2
- Authority
- JP
- Japan
- Prior art keywords
- arc tube
- lamp
- sealed
- metal halide
- sealing
- 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 - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
- H01J61/366—Seals for leading-in conductors
- H01J61/368—Pinched seals or analogous seals
-
- 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
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
- H01J9/32—Sealing leading-in conductors
- H01J9/323—Sealing leading-in conductors into a discharge lamp or a gas-filled discharge device
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
Description
【発明の詳細な説明】 〔発明の目的〕 （産業上の利用分野） 本発明は発光管が片封止形のメタルハライドランプに関
する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a metal halide lamp having a single-sealed arc tube.
（従来の技術） 屋外照明や工場照明等に使用される高輝度放電灯すなわ
ちHIDランプが、近年に至り店舗等の低天井の屋内照明
等にも使用されはじめている。特に、メタルハライドラ
ンプは高効率、高演色性の利点から、これを小形化して
上記目的に使用されるケースが多くなつている。このよ
うなランプの小形化に際しては、ランプ電力を小さくす
るとともに、寸法自体を小さくして器具も含めた小形化
が検討され、その一手段として片封止形の石英二重管形
ランプの開発が進められている。(Prior Art) High-intensity discharge lamps or HID lamps used for outdoor lighting, factory lighting, etc. have recently begun to be used for low-ceiling indoor lighting in stores and the like. In particular, metal halide lamps are often miniaturized and used for the above purpose because of their advantages of high efficiency and high color rendering. In order to reduce the size of such lamps, it is considered to reduce the lamp power and the size itself to reduce the size of the lamp, and the development of a single-sealed quartz double-tube lamp is one of the means. Is being promoted.
この形のランプは、発光管および外管が共にその封止部
が一個所だけの片封止形であること、ならびに外管も石
英ガラス製であるため耐熱性に優れ、したがつて、一層
ランプ全体を小形化することができる利点を有する。This type of lamp has excellent heat resistance because both the arc tube and the outer tube are single-sealed with only one sealing part and the outer tube is made of quartz glass. This has an advantage that the entire lamp can be miniaturized.
しかしながら、その反面、片封止形発光管の封止部は電
極間に形成されるアークと平行に位置するような形態と
なるため、従来の両端封止形の場合のように最冷部が形
成される封止部内面に対応する発光管外周面に保温膜を
設けることができなくなるという問題が発生する。However, on the other hand, since the sealing part of the single-sided arc tube is positioned parallel to the arc formed between the electrodes, the coldest part is the same as in the conventional double-sided sealed type. There arises a problem that the heat insulating film cannot be provided on the outer peripheral surface of the arc tube corresponding to the inner surface of the formed sealing portion.
この理由は、片封止形発光管の封止部に保温膜を設ける
と、アークから放射される光が保温膜によつて遮光され
やすく、高効率という本ランプの利点が損なわれるから
である。The reason for this is that if a heat insulating film is provided in the sealed portion of the single-sealed arc tube, the light emitted from the arc is easily blocked by the heat insulating film, and the advantage of this lamp of high efficiency is impaired. .
また、メタルハライドランプは、発光管内に金属ハロゲ
ン化物が封入されており、発光管内の金属ハロゲン化物
の蒸気圧の変化は、点灯時における発光効率を大きく左
右する。そして、発光管内の金属ハロゲン化物の蒸気圧
は、発光管の最冷部の温度によって決まる。したがっ
て、最冷部の温度が低くすぎると所定の蒸気圧が得られ
ないで、ランプの点灯しても金属ハロゲン化物が発光に
寄与しなくなって、発光効率が悪くなることになる。Further, in a metal halide lamp, a metal halide is enclosed in an arc tube, and a change in vapor pressure of the metal halide in the arc tube greatly affects luminous efficiency at the time of lighting. The vapor pressure of the metal halide in the arc tube is determined by the temperature of the coldest part of the arc tube. Therefore, if the temperature of the coldest part is too low, a predetermined vapor pressure cannot be obtained, and even if the lamp is turned on, the metal halide does not contribute to light emission, and the light emission efficiency deteriorates.
片封止形発光管は、発光管がアークに対して比較的小さ
いので、封止部が最冷部となりやすい。したがって、片
封止形発光管の場合、所望の発光効率が得るために、発
光管の放熱源である封止部からの熱損失を少なくして、
最冷部温度の低下を抑制することが両端封止形の発光管
よりもさらに必要となる。In the single-sealed arc tube, since the arc tube is relatively small with respect to the arc, the sealed part is likely to be the coldest part. Therefore, in the case of a single-sealed arc tube, in order to obtain a desired luminous efficiency, the heat loss from the sealing part which is the heat radiation source of the arc tube is reduced,
It is more necessary to suppress the decrease in the temperature of the coldest part than in the arc tube of the both ends sealed type.
（発明が解決しようとする課題） しかしながら、上記のように片封止形の発光管の封止部
に保温膜を形成することは、両端封止形の発光管に比べ
て光を遮光しやすくなる。(Problems to be Solved by the Invention) However, forming the heat insulating film in the sealing portion of the one-side sealed arc tube as described above makes it easier to shield light as compared with the both-end sealed arc tube. Become.
一方、放熱源となる封止部を小さくすれば、保温膜を形
成することなく、熱損失が少なくなり、最冷部温度の低
下を抑制できそうではある。しかしながら、片封止形の
発光管の封止部には、２本の電極軸および２本の電極軸
にそれぞれ接続される２枚の封着用金属箔がそれぞれ封
止されるため、封止部を小さくしすぎると、封止部に巣
が生じてリークし、封着用金属箔同士の接触による短絡
事故が発生し短寿命となる問題がある。On the other hand, if the sealed portion that serves as a heat radiation source is made small, it is likely that the heat loss will be reduced without forming a heat insulating film, and the temperature drop in the coldest portion can be suppressed. However, since the sealing portion of the single-sealed arc tube is sealed with the two electrode shafts and the two sealing metal foils connected to the two electrode shafts, respectively. If is too small, there is a problem that a nest is generated in the sealing portion and leaks, a short circuit accident occurs due to contact between the sealing metal foils, and the life is shortened.
本発明は上記問題を考慮してなされたもので、発光管を
片封止形にしながら発光管の最冷部温度を所望に維持し
て発光効率の低下を抑えることができ、かつランプ寿命
の長いメタルハライドランプを提供することを目的とす
る。The present invention has been made in consideration of the above problems, and it is possible to keep the temperature of the coldest part of the arc tube at a desired level while suppressing the deterioration of the luminous efficiency while keeping the arc tube in a single-sealed type, and to reduce the lamp life. The purpose is to provide a long metal halide lamp.
（問題点を解決するための手段） 本発明のメタルハライドランプは、一対の主電極を同一
封止部に設けた片封止形の発光管を、外管内に収容し、
発光管の封止部の表面積をＳ（cm2）、ランプの入力電
力をWL（ワット）としたとき、 1.9＋0.075WL≧Ｓ≧0.5＋0.033WL を満足するように構成される。(Means for Solving Problems) A metal halide lamp of the present invention has a single-sealed arc tube in which a pair of main electrodes are provided in the same sealed portion, and is housed in an outer tube.
When the surface area of the sealed portion of the arc tube is S (cm 2 ) and the input power of the lamp is WL (Watt), it is configured to satisfy 1.9 + 0.075WL ≧ S ≧ 0.5 + 0.033WL.
なお、申すまでもなく、封止部の表面積とは、放電空間
を形成する部分の面積を除いた、封止部の正面、左右両
側面、背面および底面の各面積の和をいう。Needless to say, the surface area of the sealing portion means the sum of the areas of the front surface, the left and right side surfaces, the back surface, and the bottom surface of the sealing portion, excluding the area of the portion forming the discharge space.
（作用） 本発明によれば、ランプの入力電力WLに応じて、発光管
の最冷部温度に大きな影響を与える発光管封止部の表面
積Ｓを1.9＋.0.075WL以下としたので、封止部の表面か
らの熱損失をできるだけ抑えられるから、上記最冷部温
度の低下を抑制し、発光特性の低下を抑えることができ
る。(Operation) According to the present invention, the surface area S of the arc tube sealing portion, which greatly affects the temperature of the coldest part of the arc tube, is set to 1.9 + .0.075 WL or less according to the input power WL of the lamp. Since the heat loss from the surface of the stop portion can be suppressed as much as possible, it is possible to suppress the decrease in the temperature of the coldest part and the deterioration of the light emission characteristics.
さらに、表面積Ｓを0.5＋0.033WL以上としたので、封止
部表面積Ｓを小さくするほど、封着用金属箔もまた小さ
くする必要を生じ、封止部ガラスとの接触面積が少なく
なつて封止部の内部に巣を生じ、リークが発生しやすく
なるとか、また封止部の偏平面の巾が狭くたり過ぎるた
め、各主電極に接続する封止部内の気密封着用の金属箔
が接触して短絡する等の不都合を回避できる。Furthermore, since the surface area S is set to 0.5 + 0.033 WL or more, the smaller the surface area S of the sealing portion, the smaller the metal foil for sealing needs to be made. A metal foil for airtightness in the sealing part connected to each main electrode may come into contact with it because the nests inside the part are likely to cause leaks and the flat surface of the sealing part is too narrow. It is possible to avoid inconveniences such as short circuit.
（実施例） 本発明の一実施例を説明する。第１図はランプ入力電力
150W級のメタルハライドランプの概略的構成説明図を示
す。（１）は石英ガラス製の外管で、一端側にのみ封止
部（1a）を形成した片封止形で、通常、封止部（1a）に
は口金（図示しない。）が装着され、また内部には石英
ガラス製の発光管（２）が収容されている。上記発光管
の内容積は約0.5ccで、その一端側にのみ封止部（2a）
が形成されている。（３）、（３）は例えばトリエーテ
ッドタングステンからなる軸径0.5mmの一対の主電極
で、各一端は、アークが形成可能に所定の電極間距離を
とって配設され、各他端側は同一の封止部（2a）に封着
され、金属箔（４）、（４）を介して発光管リード線
（５）、（５）に接続され、さらにこれ等発光管リード
線、（５）、（５）は外管封止部（1a）に気密に封着さ
れた金属箔（６）、（６）を介して外管リード線
（７）、（７）に接続されている。また、上記発光管
（２）内には所定量の始動用希ガス、水銀および金属ハ
ロゲン化物としてたとえばSnI2、T1I、InI、NaBrおよび
LiBrが封入されている。(Example) An example of the present invention will be described. Figure 1 shows the lamp input power
The schematic structure explanatory drawing of a 150 W class metal halide lamp is shown. (1) is an outer tube made of quartz glass, which is a single-sealing type in which a sealing portion (1a) is formed only on one end side, and a cap (not shown) is usually attached to the sealing portion (1a). In addition, an arc tube (2) made of quartz glass is housed inside. The inner volume of the arc tube is about 0.5cc, and the sealing part (2a) is only on one end side.
Are formed. (3) and (3) are a pair of main electrodes made of, for example, thoriated tungsten and having a shaft diameter of 0.5 mm. Each one end is arranged with a predetermined distance between the electrodes so that an arc can be formed, and each other end side. Are sealed to the same sealing portion (2a) and connected to the arc tube lead wires (5) and (5) through the metal foils (4) and (4). 5) and 5) are connected to outer tube lead wires (7) and (7) through metal foils (6) and (6) that are hermetically sealed to the outer tube sealing portion (1a). . In the arc tube (2), a predetermined amount of starting rare gas, mercury and metal halides such as SnI2, T1I, InI, NaBr and
LiBr is enclosed.
さらに、上記発光管封止部（2a）は，長さ2.0cm、巾1.7
cm、厚さ0.3cmである。したがって、封止部（2a）の表
面積Ｓは2.0×（1.7＋0.3＋1.7＋0.3）＝約8.5cm2にな
るように圧潰して成形されている。Furthermore, the arc tube sealing part (2a) has a length of 2.0 cm and a width of 1.7 cm.
cm, thickness 0.3 cm. Therefore, the surface area S of the sealing portion (2a) is crushed and molded so that the surface area S becomes 2.0 × (1.7 + 0.3 + 1.7 + 0.3) = about 8.5 cm 2 .
このような構成のランプは、点灯時に両主電極（３）、
（３）に生じるアークから発生する熱の損失の最も大き
な個所である発光管（２）の封止部（2a）が、ランプ入
力電力150Wに対してその表面積Ｓが8.5cm2と小さく設定
されているので、封止部（2a）の表面からの熱損失は抑
制される。したがつて、発光管最冷部温度の不所望の低
下は防止され、それによって発光特性は垂直点灯時で約
821m/Wを得ることができた。The lamp having such a structure has two main electrodes (3),
The surface area S of the sealing part (2a) of the arc tube (2), where the heat loss generated from the arc generated in (3) is the largest, is set as small as 8.5 cm 2 with respect to the lamp input power of 150 W. Therefore, heat loss from the surface of the sealing portion (2a) is suppressed. Therefore, the undesired decrease in the temperature of the coldest part of the arc tube is prevented, and as a result, the emission characteristics are approximately
We were able to get 821m / W.
上記実施例と同じランプ入力電力150W級のランプにつ
き、発光管封止部（2a）の表面積Ｓを種々変化させ、そ
れぞれの発光効率1m/Wについて測定した結果を第２図に
示す。図の横軸は上記Ｓ（cm2）であり、縦軸は発光効
率の相対値である。図から判るようにＳを13.15cm2以下
と小さくすると発光効率は飽和してほぼ一定値となる
が、13.15cm2を越えて大きくすると発光効率の低下が目
立つようになる。このようにＳを小さくすることは好ま
しい。しかしながら、あまりＳを小さくしようとする
と、圧潰封止による封止部形成工程における押圧力を小
さくしなければならず、このため封止都内に巣を生じて
リークが発生しやすくなったり、または封止部偏平面の
巾も狭くなつて封止部内の封着用金属箔（４）、（４）
が互に接触して短絡事故を生じて短寿命となることがあ
るので、Ｓは５・45cm2以上とすることが望ましい。FIG. 2 shows the results of measuring the luminous efficiency of 1 m / W for each of the lamps with the same lamp input power of 150 W as in the above example, while varying the surface area S of the arc tube sealing portion (2a). The horizontal axis of the figure is the above S (cm 2 ) and the vertical axis is the relative value of the luminous efficiency. As can be seen from the figure, when S is reduced to 13.15 cm 2 or less, the luminous efficiency is saturated and becomes a substantially constant value, but when S is increased beyond 13.15 cm 2 , the luminous efficiency is conspicuously deteriorated. It is preferable to reduce S in this way. However, if S is made too small, the pressing force in the sealing portion forming step by crushing and sealing must be reduced, which causes nests in the sealing city to easily cause a leak, or The width of the stop flat surface is also narrowed, and the metal foil for sealing in the sealing portion (4), (4)
It is desirable to set S to 5.45 cm 2 or more, as they may contact each other and cause a short circuit accident resulting in a short life.
したがって、Ｓを5.45〜13.15の範囲に規制すれば，発
光効率が優れ、かつ、長寿命の片封止形にメタルハライ
トランプが得られることが判った。Therefore, it has been found that if S is regulated within the range of 5.45 to 13.15, a single-sealed metal halide lamp having excellent luminous efficiency and long life can be obtained.
次に、上記150Wランプと同様の実験を、70W級、40W級の
各ランプについても実験した。この結果を第３図に示
す。第３図において横軸にはランプ入力電力WL（ワッ
ト）を，縦軸には封止部の表面積Ｓ（cm2）をとり、直
線Ａは各ランプにおいて、発光管の最冷部温度を維持し
て発光効率の低下を防止できるＳの最大表面積値を結ん
だものであり、直線Ｂは封止部に巣を生じたり、封着用
金属箔同士の接触による短絡事故等を防止して長寿命が
得られるＳの最小表面積値を結んだものである。したが
って、直線Ａと直線Ｂとで囲まれる斜線の領域内に発光
管封止部の表面積Ｓ（cm2）を設定すれば、Ｓに起因す
る発光効率の低下がなく、かつ長寿命の片封止形メタル
ハライドランプが得られることが判った。Next, the same experiment as the above 150 W lamp was conducted for each of the 70 W class and 40 W class lamps. The results are shown in FIG. In FIG. 3, the horizontal axis represents the lamp input power WL (Watt), and the vertical axis represents the surface area S (cm 2 ) of the sealing part. The straight line A indicates the temperature of the coldest part of the arc tube in each lamp. The maximum surface area value of S that can prevent the decrease of luminous efficiency is tied, and the straight line B prevents the occurrence of cavities in the sealing part and the short-circuit accident due to the contact between the metal foils for sealing, and the long life. Is obtained by connecting the minimum surface area values of S to obtain Therefore, when the surface area S (cm 2 ) of the arc tube sealing portion is set within the shaded area surrounded by the straight line A and the straight line B, the luminous efficiency is not reduced by S and the long-life single-sided seal is obtained. It was found that a static metal halide lamp could be obtained.
直線Ａは、 １・９＋０・075WL ……（１） で示され、また直線Ｂは、 0.5＋０・033WL ……（２） で示される。The straight line A is represented by 1.9 + 0 · 075WL (1), and the straight line B is represented by 0.5 + 0 · 033WL (2).
したがって、発光管封止部の表面積Ｓ（cm2）はランプ
の入力費力WL（ワット）に対して、 1.9＋0.075WL≧Ｓ≧0.5＋0.033WL ……（３） を満足すればよいことになる。Therefore, the surface area S (cm 2 ) of the arc tube sealing part should satisfy 1.9 + 0.075WL ≧ S ≧ 0.5 + 0.033WL (3) with respect to the input cost of the lamp WL (watt). Become.
本発明の構成によれば、片封止形の発光管でありなが
ら、保温膜を封止部に形成することなく、封止部表面か
らの熱損失を少なくして最冷部温度の低下を抑制できる
ので、保温膜による遮光の問題なしに発光効率の低下を
抑えられ、かつ長寿命のメタルハライドランプを得るこ
とができる。According to the configuration of the present invention, even though it is a single-sealed arc tube, the heat loss from the surface of the sealing portion is reduced and the temperature of the coldest portion is lowered without forming a heat insulating film in the sealing portion. Since this can be suppressed, it is possible to obtain a metal halide lamp that can suppress the decrease in luminous efficiency and have a long life without the problem of light shielding by the heat insulating film.
第１図は本発明の一実施例の概略的構成説明図、第２図
は150Wメタルハライドランプにおける発光効率（相対
値）と発光管封止部表面積との関孫を示す特性図、第３
図は種々の入力電力のランプにおいて最適特性が得られ
る発光管封止部表面積の領域を示す図である。 （１）……外管、（２）……発光管、（2a）……封止
部、（４）……主電極。FIG. 1 is a schematic configuration explanatory view of an embodiment of the present invention, and FIG. 2 is a characteristic diagram showing a relation between luminous efficiency (relative value) and surface area of an arc tube sealing portion in a 150 W metal halide lamp.
The figure is a diagram showing a region of the surface area of the arc tube sealing portion where optimum characteristics are obtained in a lamp having various input powers. (1) ... Outer tube, (2) ... Arc tube, (2a) ... Sealing part, (4) ... Main electrode.
Claims (1)
Ｓ（cm2）、ランプ入力電力をWL（ワット）としたと
き、 1.9＋0.075≧Ｓ≧0.5＋0.033WL の条件を満足する発光管と； 発光管内に封入された始動用希ガス、水銀および金属ハ
ロゲン化物と； 発光管内に一端が所定の電極間距離を形成して位置する
とともに、他端側が封止部に封止された一対の主電極
と； 発光管を収容した外管と； を具備していることを特徴とするメタルハライドラン
プ。1. When a sealing portion is provided at one end side, the surface area of the sealing portion is S (cm 2 ) and the lamp input power is WL (watt), 1.9 + 0.075 ≧ S ≧ 0.5 + 0.033WL Arc lamp that satisfies the conditions of ;; Noble gas for starting, mercury, and metal halide enclosed in the arc tube; one end is located in the arc tube with a predetermined distance between electrodes, and the other end is sealed A metal halide lamp comprising: a pair of main electrodes sealed in a portion; an outer tube accommodating an arc tube;
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62234767A JPH0762993B2 (en) | 1987-09-21 | 1987-09-21 | Metal halide lamp |
| CA000577758A CA1303662C (en) | 1987-09-21 | 1988-09-19 | One-side-sealed high intensity discharge lamp with a specific sealed portion |
| AU22388/88A AU587955B2 (en) | 1987-09-21 | 1988-09-19 | One-side-sealed type high intensity discharge lamp compensated for decrease in luminous efficiency and its manufacturing method |
| GB8822009A GB2210196B (en) | 1987-09-21 | 1988-09-20 | One-side-sealed type high intensity discharge lamp compensated for decrease in luminous efficiency and its manufacturing method |
| FR8812340A FR2620857B1 (en) | 1987-09-21 | 1988-09-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62234767A JPH0762993B2 (en) | 1987-09-21 | 1987-09-21 | Metal halide lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6481163A JPS6481163A (en) | 1989-03-27 |
| JPH0762993B2 true JPH0762993B2 (en) | 1995-07-05 |
Family
ID=16976041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62234767A Expired - Fee Related JPH0762993B2 (en) | 1987-09-21 | 1987-09-21 | Metal halide lamp |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPH0762993B2 (en) |
| AU (1) | AU587955B2 (en) |
| CA (1) | CA1303662C (en) |
| FR (1) | FR2620857B1 (en) |
| GB (1) | GB2210196B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU604126B2 (en) * | 1987-06-11 | 1990-12-06 | Kabushiki Kaisha Toshiba | High intensity discharge lamp of the one side sealed type capable of compensating for the change of luminous efficiency caused by its different lighting angles and manufacturing method of the same |
| US5138229A (en) * | 1989-09-20 | 1992-08-11 | Toshiba Lighting & Technology Corporation | Single-sealed metal vapor electric discharge lamp |
| US5117154A (en) * | 1990-12-31 | 1992-05-26 | Welch Allyn, Inc. | Metal halide discharge lamp with improved shank loading factor |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1313437A (en) * | 1962-01-23 | 1962-12-28 | Lampes Sa | Gas arc discharge lamp |
| FR1367483A (en) * | 1963-04-17 | 1964-07-24 | Pat & Visseaux Claude | Electric discharge lamp |
| DE2826733C2 (en) * | 1977-07-05 | 1982-07-29 | General Electric Co., Schenectady, N.Y. | High pressure metal halide discharge lamp |
| US4302699A (en) * | 1980-03-24 | 1981-11-24 | Gte Products Corporation | Low wattage metal halide arc discharge lamp having optimum efficacy |
| US4396857A (en) * | 1980-07-01 | 1983-08-02 | General Electric Company | Arc tube construction |
| JPS5740856A (en) * | 1980-08-22 | 1982-03-06 | Toshiba Corp | Metal halide lamp |
| US4454450A (en) * | 1981-06-29 | 1984-06-12 | Gte Products Corporation | Vertical running, high brightness, low wattage metal halide lamp |
| JPS5835858A (en) * | 1981-08-28 | 1983-03-02 | Toshiba Corp | Compact metal halide lamp |
| JPS5983337A (en) * | 1982-11-02 | 1984-05-14 | Toshiba Corp | Small metal halide lamp |
| US4636687A (en) * | 1984-03-27 | 1987-01-13 | Gte Products Corporation | Electrode alignment and capsule design for single-ended low wattage metal halide lamps |
| US4631446A (en) * | 1984-05-04 | 1986-12-23 | Gte Products Corporation | Single-ended high intensity discharge lamp |
| DE3425894A1 (en) * | 1984-07-13 | 1986-01-23 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München | ELECTRIC LAMP |
| AU604126B2 (en) * | 1987-06-11 | 1990-12-06 | Kabushiki Kaisha Toshiba | High intensity discharge lamp of the one side sealed type capable of compensating for the change of luminous efficiency caused by its different lighting angles and manufacturing method of the same |
| US4876483A (en) * | 1988-05-26 | 1989-10-24 | Gte Products Corporation | Arc lamp with surface arc resistant barrier |
-
1987
- 1987-09-21 JP JP62234767A patent/JPH0762993B2/en not_active Expired - Fee Related
-
1988
- 1988-09-19 AU AU22388/88A patent/AU587955B2/en not_active Ceased
- 1988-09-19 CA CA000577758A patent/CA1303662C/en not_active Expired - Lifetime
- 1988-09-20 GB GB8822009A patent/GB2210196B/en not_active Expired - Lifetime
- 1988-09-21 FR FR8812340A patent/FR2620857B1/fr not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| GB2210196B (en) | 1992-04-15 |
| FR2620857B1 (en) | 1993-12-31 |
| GB8822009D0 (en) | 1988-10-19 |
| AU587955B2 (en) | 1989-08-31 |
| CA1303662C (en) | 1992-06-16 |
| JPS6481163A (en) | 1989-03-27 |
| FR2620857A1 (en) | 1989-03-24 |
| GB2210196A (en) | 1989-06-01 |
| AU2238888A (en) | 1989-03-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |