JPS5460777A - Fluorescent lamp - Google Patents
Fluorescent lampInfo
- Publication number
- JPS5460777A JPS5460777A JP12692077A JP12692077A JPS5460777A JP S5460777 A JPS5460777 A JP S5460777A JP 12692077 A JP12692077 A JP 12692077A JP 12692077 A JP12692077 A JP 12692077A JP S5460777 A JPS5460777 A JP S5460777A
- Authority
- JP
- Japan
- Prior art keywords
- exhaustion
- seconds
- electrodes
- barium
- fluorescent 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.)
- Granted
Links
Landscapes
- Discharge Lamp (AREA)
Abstract
PURPOSE: To provide a fluorescent lamp wherein an electron radiating substance essentially composed of barium carbonate, strontium carbonate, and calcium carbonate is subjected to pylolytic activation by dividing the same into the former stage part and the latter stage part of the heating and degassing steps of the fluorescent body, thereby to reduce the quantity of barium.
CONSTITUTION: An electron radiating substance essentially composed of ternary carbonates in which molar ratio of barium, strontium and calcium is applied to double coil filaments in the quantity of about 60 mg. The electrodes thus applied with the electron radiating substance are sealed to both ends of a 40W lamp tube. The thus prepared fluorescent lamp is fitted to an exhaustion device, and the exhaustion of the lamp tube is started through a heating furnace to carry out the exhaustion of gas within the fluorescent body. Five seconds after the start of exhaustion and five seconds before leaving the furnace, a current is carried to the filament coils, thereby to carry out pylolytic activation treatments of said coils for 15 seconds and 8 seconds, respectively, to form the electrodes into oxidide electrodes.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12692077A JPS5837942B2 (en) | 1977-10-21 | 1977-10-21 | fluorescent lamp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12692077A JPS5837942B2 (en) | 1977-10-21 | 1977-10-21 | fluorescent lamp |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5460777A true JPS5460777A (en) | 1979-05-16 |
JPS5837942B2 JPS5837942B2 (en) | 1983-08-19 |
Family
ID=14947165
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12692077A Expired JPS5837942B2 (en) | 1977-10-21 | 1977-10-21 | fluorescent lamp |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5837942B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS645909A (en) * | 1987-06-29 | 1989-01-10 | Sakai Chemical Industry Co | Carbonate of alkaline-earth metal |
EP0592915A1 (en) * | 1992-10-15 | 1994-04-20 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Low-pressure discharge lamp and process for producing a low-pressure discharge lamp |
-
1977
- 1977-10-21 JP JP12692077A patent/JPS5837942B2/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS645909A (en) * | 1987-06-29 | 1989-01-10 | Sakai Chemical Industry Co | Carbonate of alkaline-earth metal |
EP0592915A1 (en) * | 1992-10-15 | 1994-04-20 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Low-pressure discharge lamp and process for producing a low-pressure discharge lamp |
US5614784A (en) * | 1992-10-15 | 1997-03-25 | Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh | Discharge lamp, particularly cold-start fluorescent lamp, and method of its manufacture |
Also Published As
Publication number | Publication date |
---|---|
JPS5837942B2 (en) | 1983-08-19 |
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