JPS5532339A - Manufacturing luminous tube for high pressure alkali metal vapour discharge lamp - Google Patents
Manufacturing luminous tube for high pressure alkali metal vapour discharge lampInfo
- Publication number
- JPS5532339A JPS5532339A JP10509878A JP10509878A JPS5532339A JP S5532339 A JPS5532339 A JP S5532339A JP 10509878 A JP10509878 A JP 10509878A JP 10509878 A JP10509878 A JP 10509878A JP S5532339 A JPS5532339 A JP S5532339A
- Authority
- JP
- Japan
- Prior art keywords
- grinding
- tube
- particles
- alumina
- ceramic tube
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
PURPOSE:To provide a durable discharge lamp of high transmittance by preventing cracking of ceramic tube sealing part by grinding both ends of a light transmittable alumina ceramic tube made of alumina particles of a specific size by abrasive particles of a specific size. CONSTITUTION:A luminous tube is prepared by grinding the internal and/or external surface of both ends of a light transmittable alumina ceramic tube 2 made of alumina particles of mean diameter over 80mu by abrasive particles of diameters less than 70mu. For example, the internal surface of both ends of an alumina ceramic tube 2 which is prepared from alumina particles of a larger mean particle size and thus provided with improved transmittance is ground by conical grinding face 13 of a grinding tool 12 having diamond grinding particles smaller than 70mu to form ground face 14, thus cracks and microcracks produced in cutting the tube are removed so that faulty sealing due to cracks is prevented providing durable discharge tube of a high transmittance.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10509878A JPS5532339A (en) | 1978-08-29 | 1978-08-29 | Manufacturing luminous tube for high pressure alkali metal vapour discharge lamp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10509878A JPS5532339A (en) | 1978-08-29 | 1978-08-29 | Manufacturing luminous tube for high pressure alkali metal vapour discharge lamp |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5532339A true JPS5532339A (en) | 1980-03-07 |
Family
ID=14398415
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10509878A Pending JPS5532339A (en) | 1978-08-29 | 1978-08-29 | Manufacturing luminous tube for high pressure alkali metal vapour discharge lamp |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5532339A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0333455A2 (en) * | 1988-03-16 | 1989-09-20 | Ngk Insulators, Ltd. | Ceramic envelope device for high-pressure discharge lamp, and method for producing the same |
-
1978
- 1978-08-29 JP JP10509878A patent/JPS5532339A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0333455A2 (en) * | 1988-03-16 | 1989-09-20 | Ngk Insulators, Ltd. | Ceramic envelope device for high-pressure discharge lamp, and method for producing the same |
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