JPS6450359A - Extra-high pressure mercury lamp - Google Patents
Extra-high pressure mercury lampInfo
- Publication number
- JPS6450359A JPS6450359A JP62206282A JP20628287A JPS6450359A JP S6450359 A JPS6450359 A JP S6450359A JP 62206282 A JP62206282 A JP 62206282A JP 20628287 A JP20628287 A JP 20628287A JP S6450359 A JPS6450359 A JP S6450359A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- outer layer
- copper
- heat conductivity
- extra
- 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.)
- Pending
Links
Abstract
PURPOSE:To obtain an extra-high mercury lamp which is small in deterioration of an electrode, in particular, electrode on the electron emitting side and long in life by inserting a metal body high in heat conductivity into at least an electron emitting electrode main body along the longitudinal direction so as to make into two-layer structure. CONSTITUTION:A cathode 12 is so formed that it has diameter c=2mm and has two-layer structure where the outer layer 12A consists of tungsten (La2O3-W) which includes La2O3 by 2% and the inner layer 12B consists of metal which is higher in heat conductivity and lower in low melting point than the tungsten, for example, copper. This inner part 12B is formed by providing a through hole, in the center axis direction, in the outer layer 12A by a hollow processing method and casting copper into this through hole. An anode 13 is so formed that it has diameter d=4mm and two-layer structure where the outer layer 13A consists of Pure-W, and the inner layer 13B consists of metal which is higher in heat conductivity and lower in low melting point than the Pure-W, for example, copper. This inner layer 13B is formed also by casting copper into a through hole provided in the center axis direction of the outer layer 13A.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62206282A JPS6450359A (en) | 1987-08-21 | 1987-08-21 | Extra-high pressure mercury lamp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62206282A JPS6450359A (en) | 1987-08-21 | 1987-08-21 | Extra-high pressure mercury lamp |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6450359A true JPS6450359A (en) | 1989-02-27 |
Family
ID=16520732
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62206282A Pending JPS6450359A (en) | 1987-08-21 | 1987-08-21 | Extra-high pressure mercury lamp |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6450359A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0917180A1 (en) * | 1997-11-18 | 1999-05-19 | Matsushita Electronics Corporation | High pressure discharge lamp, lighting optical apparatus using the same as light source, and image display system |
WO2003075311A1 (en) * | 2002-03-05 | 2003-09-12 | Patent-Treuhandgesellschaft Für Elektrische Glühlampen Mbh | Mercury short arched lamp with a cathode containing lanthanum oxide |
JP2005519435A (en) * | 2002-03-05 | 2005-06-30 | パテント−トロイハント−ゲゼルシヤフト フユール エレクトリツシエ グリユーラムペン ミツト ベシユレンクテル ハフツング | Short arc type high pressure discharge lamp |
EP1729325A2 (en) | 2005-06-03 | 2006-12-06 | Ushiodenki Kabushiki Kaisha | Ultra-high pressure mercury lamp |
KR100685719B1 (en) * | 2002-04-26 | 2007-02-23 | 우시오덴키 가부시키가이샤 | Discharge lamp |
-
1987
- 1987-08-21 JP JP62206282A patent/JPS6450359A/en active Pending
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0917180A1 (en) * | 1997-11-18 | 1999-05-19 | Matsushita Electronics Corporation | High pressure discharge lamp, lighting optical apparatus using the same as light source, and image display system |
US6211616B1 (en) | 1997-11-18 | 2001-04-03 | Matsushita Electronics Corporation | High pressure discharge lamp, with tungsten electrode and lighting optical apparatus and image display system using the same |
USRE38807E1 (en) * | 1997-11-18 | 2005-10-04 | Matsushita Electric Industrial Co., Ltd. | High pressure discharge lamp, with tungsten electrode and lighting optical apparatus and image display system using the same |
WO2003075311A1 (en) * | 2002-03-05 | 2003-09-12 | Patent-Treuhandgesellschaft Für Elektrische Glühlampen Mbh | Mercury short arched lamp with a cathode containing lanthanum oxide |
JP2005519435A (en) * | 2002-03-05 | 2005-06-30 | パテント−トロイハント−ゲゼルシヤフト フユール エレクトリツシエ グリユーラムペン ミツト ベシユレンクテル ハフツング | Short arc type high pressure discharge lamp |
KR100685719B1 (en) * | 2002-04-26 | 2007-02-23 | 우시오덴키 가부시키가이샤 | Discharge lamp |
EP1729325A2 (en) | 2005-06-03 | 2006-12-06 | Ushiodenki Kabushiki Kaisha | Ultra-high pressure mercury lamp |
EP1729325A3 (en) * | 2005-06-03 | 2007-07-04 | Ushiodenki Kabushiki Kaisha | Ultra-high pressure mercury lamp |
US7649319B2 (en) | 2005-06-03 | 2010-01-19 | Ushiodenki Kabushiki Kaisha | Ultra-high pressure mercury lamp |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ATE114397T1 (en) | ELECTRODE FOR PLASMA ARC TORCH. | |
ATE547925T1 (en) | ELECTRODE WITH BRAZED SEPARATOR | |
KR970063318A (en) | Short Arc Discharge Lamp | |
KR890011668A (en) | Contact tip for arc welding | |
US3248586A (en) | Discharge lamp electrode | |
JPS6450359A (en) | Extra-high pressure mercury lamp | |
EP1047111A3 (en) | Short-arc discharge lamp | |
DE69604135D1 (en) | Short arc type mercury lamp and operating method thereof | |
GB1307417A (en) | Mercury-vapour discharge lamp | |
TW429390B (en) | Mercury-free metal-halide lamp | |
EP1065697A3 (en) | A fluorescent lamp and method for making electrode assemblies for fluorescent lamps | |
KR19980045917A (en) | Power saving impregnation cathode structure | |
GB2129609A (en) | Electrodes for laser exciter lamps | |
US1634201A (en) | Glow-discharge tube | |
GB1077228A (en) | Indirectly heated cathode | |
JP2561898B2 (en) | Discharge lamp | |
US2579109A (en) | Electrode structure for electric discharge devices | |
KR920007050A (en) | Cathode structure for electron tube and manufacturing method | |
US2118000A (en) | Gaseous electric discharge system | |
JPH11260313A (en) | Cathode for short arc discharge tube | |
JPH04106832A (en) | Lead pin and luminous tube | |
JPH02265159A (en) | Fluorescent lamp | |
RU2209483C2 (en) | Electron-and-ion source | |
JP2003178668A (en) | Lead-in wire for vessel and vessel | |
KR900002531Y1 (en) | The cathode structure using a electron tube |