GB448340A - Improvements in and relating to electric discharge lamps - Google Patents
Improvements in and relating to electric discharge lampsInfo
- Publication number
- GB448340A GB448340A GB3496134A GB3496134A GB448340A GB 448340 A GB448340 A GB 448340A GB 3496134 A GB3496134 A GB 3496134A GB 3496134 A GB3496134 A GB 3496134A GB 448340 A GB448340 A GB 448340A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sodium
- closed
- lamp
- discharge lamps
- caps
- 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
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
Abstract
448,340. Discharge lamps. BRITISH THOMSON - HOUSTON CO., Ltd., Crown House, Aldwych, London, and DAVIES, L. J., 147, Murray Road, and SCOTT, W. J., 16, Oval Road, both in Rugby. Dec. 5, 1934, No. 34961. [Class 39 (i)] A sodium lamp is provided with an outer envelope 5, Fig. 1, of ordinary glass and with an inner envelope 1, which is made of material not attacked by sodium and is closed at its ends by tightly fitting moulded caps 2, preferably of ceramic or vitreous material, in which the leading-in wires are secured. The inner envelope may be reinforced by wire or mesh or by a glaze on the internal surface thereof, and the caps may be tapered or spigotted and may be ground. Both envelopes may be exhausted simultaneously by the provision of a capillary tube 6 and subsequently, neon is introduced and a capule 7 heated by means of a high-frequency coil to release sodium vapour. Condensed sodium will block the tubes 6 during operation. In another form, a single-ended tube 10, Fig. 2, is closed by a cap 11 and is surrounded by a vacuum jacket. The joint will be sealed by condensed sodium vapour. Glass wool 12 reduces the thermal radiation from the lamp to the pinch.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3496134A GB448340A (en) | 1934-12-05 | 1934-12-05 | Improvements in and relating to electric discharge lamps |
| FR798719D FR798719A (en) | 1934-12-05 | 1935-12-05 | Improvements to discharge lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3496134A GB448340A (en) | 1934-12-05 | 1934-12-05 | Improvements in and relating to electric discharge lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB448340A true GB448340A (en) | 1936-06-05 |
Family
ID=10372139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3496134A Expired GB448340A (en) | 1934-12-05 | 1934-12-05 | Improvements in and relating to electric discharge lamps |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR798719A (en) |
| GB (1) | GB448340A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4754199A (en) * | 1987-03-04 | 1988-06-28 | Parker William P | Self contained gas discharge display device |
-
1934
- 1934-12-05 GB GB3496134A patent/GB448340A/en not_active Expired
-
1935
- 1935-12-05 FR FR798719D patent/FR798719A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR798719A (en) | 1936-05-25 |
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