JPS56134465A - Cathode for short-arc electric-discharge lamp - Google Patents
Cathode for short-arc electric-discharge lampInfo
- Publication number
- JPS56134465A JPS56134465A JP3695980A JP3695980A JPS56134465A JP S56134465 A JPS56134465 A JP S56134465A JP 3695980 A JP3695980 A JP 3695980A JP 3695980 A JP3695980 A JP 3695980A JP S56134465 A JPS56134465 A JP S56134465A
- Authority
- JP
- Japan
- Prior art keywords
- cathode
- cone
- chip
- short
- pointed
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
- H01J61/06—Main electrodes
- H01J61/073—Main electrodes for high-pressure discharge lamps
- H01J61/0732—Main electrodes for high-pressure discharge lamps characterised by the construction of the electrode
Landscapes
- Discharge Lamp (AREA)
Abstract
PURPOSE:To prevent the fluctuation of the brilliant area of a cathode after a long use of the cathode, by fixing a chip, which protrudes from the center of the pointed surface of a cone, to the cone which is unified with the body of the cathode. CONSTITUTION:A flat poited-end surface 6, which is perpendicular to a center axis X, is formed at the end of a cone 2 which adjoins a columnar body 1. A chip 7, which protrudes outward from the pointed-end surface 6 along the center axis X, is fixed to the center of the surface 6. Since single crystal developing area is restricted to the chip 7 during the use of a cathode, the arc-producing area of the cathode is restricted to the chip 7 protruding from the pointed-end surface 6 of the cone 2.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3695980A JPS56134465A (en) | 1980-03-25 | 1980-03-25 | Cathode for short-arc electric-discharge lamp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3695980A JPS56134465A (en) | 1980-03-25 | 1980-03-25 | Cathode for short-arc electric-discharge lamp |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56134465A true JPS56134465A (en) | 1981-10-21 |
Family
ID=12484276
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3695980A Pending JPS56134465A (en) | 1980-03-25 | 1980-03-25 | Cathode for short-arc electric-discharge lamp |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56134465A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003257364A (en) * | 2002-03-05 | 2003-09-12 | Ushio Inc | Short arc mercury lamp |
US6720731B2 (en) | 2001-08-30 | 2004-04-13 | Ushiodenki Kabushiki Kaisha | Mercury discharge lamp of the short arc type |
US6768263B2 (en) | 2001-10-30 | 2004-07-27 | Ushio Denki Kabushiki Kaisya | Short arc type mercury lamp |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5146441A (en) * | 1974-10-18 | 1976-04-20 | Nichiden Kikai Kk |
-
1980
- 1980-03-25 JP JP3695980A patent/JPS56134465A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5146441A (en) * | 1974-10-18 | 1976-04-20 | Nichiden Kikai Kk |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6720731B2 (en) | 2001-08-30 | 2004-04-13 | Ushiodenki Kabushiki Kaisha | Mercury discharge lamp of the short arc type |
US6768263B2 (en) | 2001-10-30 | 2004-07-27 | Ushio Denki Kabushiki Kaisya | Short arc type mercury lamp |
JP2003257364A (en) * | 2002-03-05 | 2003-09-12 | Ushio Inc | Short arc mercury lamp |
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