GB921162A - Improvements in or relating to methods of manufacturing sodium-vapour discharge tubes - Google Patents
Improvements in or relating to methods of manufacturing sodium-vapour discharge tubesInfo
- Publication number
- GB921162A GB921162A GB4126959A GB4126959A GB921162A GB 921162 A GB921162 A GB 921162A GB 4126959 A GB4126959 A GB 4126959A GB 4126959 A GB4126959 A GB 4126959A GB 921162 A GB921162 A GB 921162A
- Authority
- GB
- United Kingdom
- Prior art keywords
- argon
- filling
- discharge
- pressure
- 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.)
- Expired
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
- H01J9/38—Exhausting, degassing, filling, or cleaning vessels
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Discharge Lamp (AREA)
Abstract
921,162. Discharge apparatus. PHILIPS ELECTRICAL INDUSTRIES Ltd. Dec. 4, 1959 [Dec. 9, 1958], No. 41269/59. Class 39 (1). [Also in Group XXIII] In a sodium vapour discharge device having also a filling of neon at, e.g., 13 mm. pressure, and a small proportion of argon the tube is pretreated by filling it with argon, passing a discharge and subsequently providing the filling of Na, Ne and A. The argon is 0.1-1%, e.g. 0.5% of the volume of the neon. The pretreating discharge which is carried out at 0.1-0.15 mms. pressure, saturates the tube wall with argon so that the argon pressure is maintained and the ignition voltage remains at a sufficient level below the starting voltage. The tube is U shaped and is of lime glass with an internal layer of Na resistant glass, i.e. 10-30%, e.g. 24%, B 2 O 3 , 0-15%, e.g. 6%, K 2 O, 20-60% CaO and BaO, e.g. 10%, 38% respectively, 10-40%, e.g. 22% Al 2 O 3 , and is housed in an evacuated cylindrical bulb. It has thermionic electrodes.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL234051 | 1958-12-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB921162A true GB921162A (en) | 1963-03-13 |
Family
ID=19751467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4126959A Expired GB921162A (en) | 1958-12-09 | 1959-12-04 | Improvements in or relating to methods of manufacturing sodium-vapour discharge tubes |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE1106866B (en) |
| FR (1) | FR1244615A (en) |
| GB (1) | GB921162A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL293911A (en) * | 1963-06-11 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2044350A (en) * | 1934-04-13 | 1936-06-16 | Electrons Inc | Gaseous discharge tube and method of manufacture |
-
1959
- 1959-12-04 GB GB4126959A patent/GB921162A/en not_active Expired
- 1959-12-05 DE DEN17606A patent/DE1106866B/en active Pending
- 1959-12-07 FR FR812336A patent/FR1244615A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1244615A (en) | 1960-10-28 |
| DE1106866B (en) | 1961-05-18 |
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