JPS5485577A - Electric discharge lamp - Google Patents
Electric discharge lampInfo
- Publication number
- JPS5485577A JPS5485577A JP15384477A JP15384477A JPS5485577A JP S5485577 A JPS5485577 A JP S5485577A JP 15384477 A JP15384477 A JP 15384477A JP 15384477 A JP15384477 A JP 15384477A JP S5485577 A JPS5485577 A JP S5485577A
- Authority
- JP
- Japan
- Prior art keywords
- sealing
- foils
- electrode
- electrodes
- sealing foils
- 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
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
PURPOSE: To provide an electric discharge lamp, in which a hollow space is formed respectively around a junction between electrode and sealing foil, whereby bulb sealing operation is facilitated, and it is enabled to prevent breakage of sealing foils and occurrence of cracks at the sealing portions.
CONSTITUTION: At opposite end of glass container 1 made of quarz glass, a pair of rod-like tungsten electrodes 2 opposed to each other and having a diameter of about 2 mm are connected respectively to one end of sealing foils 3 of molybdenum having a thickness of about 25μ. Lead wire 7 is connected to the other end of respective sealing foils 3. A hollow space 5 is formed around respective junction 4 between electrode 2 and sealing foil 3, and a portion of electrode 2 is held tightly in place at neck portion 6 of a substantially spherical glass container. When heating the neck portions 6 and adjusting the distance between opposite electrodes 2, 2 to a predetermined value by shifting the position of electrodes 2, there is no fear of causing breakage of sealing foils 3, since hollow spaces 6, 6 are formed and quarz glass is not fused to the sealing foils.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15384477A JPS5485577A (en) | 1977-12-20 | 1977-12-20 | Electric discharge lamp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15384477A JPS5485577A (en) | 1977-12-20 | 1977-12-20 | Electric discharge lamp |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5485577A true JPS5485577A (en) | 1979-07-07 |
Family
ID=15571324
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15384477A Pending JPS5485577A (en) | 1977-12-20 | 1977-12-20 | Electric discharge lamp |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5485577A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0818804A2 (en) * | 1996-07-10 | 1998-01-14 | Koito Manufacturing Co., Ltd | ARC tube for discharge lamp device |
-
1977
- 1977-12-20 JP JP15384477A patent/JPS5485577A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0818804A2 (en) * | 1996-07-10 | 1998-01-14 | Koito Manufacturing Co., Ltd | ARC tube for discharge lamp device |
EP0818804A3 (en) * | 1996-07-10 | 1998-03-18 | Koito Manufacturing Co., Ltd | ARC tube for discharge lamp device |
US5877591A (en) * | 1996-07-10 | 1999-03-02 | Koito Manufacturing Co., Ltd. | Arc tube for discharge lamp device |
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