GB1011439A - Improvements in or relating to electric discharge lamps - Google Patents
Improvements in or relating to electric discharge lampsInfo
- Publication number
- GB1011439A GB1011439A GB27188/64A GB2718864A GB1011439A GB 1011439 A GB1011439 A GB 1011439A GB 27188/64 A GB27188/64 A GB 27188/64A GB 2718864 A GB2718864 A GB 2718864A GB 1011439 A GB1011439 A GB 1011439A
- Authority
- GB
- United Kingdom
- Prior art keywords
- potassium
- envelope
- lamp
- glass
- vapour
- 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
- H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
- H01J61/18—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent
- H01J61/22—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent vapour of an alkali metal
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Discharge Lamp (AREA)
- Lasers (AREA)
Abstract
1,011,439. Metal-vapour lamps. GENERAL ELECTRIC CO. July 1, 1964 [July 1, 1963], No. 27188/64. Heading H1D. An electric discharge lamp comprises a tubular elongated envelope of material resistant to the attack of potassium vapour, two electrodes sealed respectively into opposite ends of the envelope, and an ionizable medium within the envelope and comprising potassium and an inert starting gas, the quantity of the potassium being such that in use of the lamp the potassium vapour pressure lies in the range of 30 to 540 torr. The ceramic envelope 2 of the lamp shown is of sintered transparent polycrystalline alumina 8.5 cm. long, 6 mm. in internal diameter and having a wall thickness of 0.8 mm. increased to 1.4 mm. at the ends. Metal, preferably niobium, exhaust tubes 5 and 6 are welded to niobium end closures 3 and 4 sealed by a glassy mixture comprising mainly aluminium and calcium oxides into the envelope. Electrodes 7 and 8 each comprise tungsten coils coated with activating material slipped or screwed on to rods or studs of thoriated tungsten crimped or welded into the exhaust tubes, one, 5, of which may be a dummy while the other, 6, has a filling aperture 9 and a pinched off cold weld 10. The starting gas may be argon or preferably xenon. The projecting length of the tube 6 may be predetermined to provide a desired potassium saturation vapour pressure. The potassium may be introduced by heating to bursting point a glass ampoule located in an exhaust manifold connected to the envelope, or by electrolysing potassium into a glass appendix from a molten bath of a potassium salt. The lamp may be operated continuously on D.C. or A.C. or may be pulsed, and is suitable as a pump for a laser of neodymium barium crown glass. Drawings of the percentage absorption of a neodymium glass and of the emission spectrum of the lamp are provided (Figs. 2 and 3, not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US29192263A | 1963-07-01 | 1963-07-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1011439A true GB1011439A (en) | 1965-12-01 |
Family
ID=23122447
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB27188/64A Expired GB1011439A (en) | 1963-07-01 | 1964-07-01 | Improvements in or relating to electric discharge lamps |
Country Status (2)
Country | Link |
---|---|
ES (1) | ES301568A1 (en) |
GB (1) | GB1011439A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1589691B1 (en) * | 1966-07-13 | 1972-05-04 | Deutschbein Otto Dipl Ing Dr | OPTICALLY EXCITED OPTICAL TRANSMITTER |
WO2007047173A2 (en) * | 2005-10-13 | 2007-04-26 | General Electric Company | High pressure alkali metal discharge lamp |
-
1964
- 1964-06-30 ES ES0301568A patent/ES301568A1/en not_active Expired
- 1964-07-01 GB GB27188/64A patent/GB1011439A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1589691B1 (en) * | 1966-07-13 | 1972-05-04 | Deutschbein Otto Dipl Ing Dr | OPTICALLY EXCITED OPTICAL TRANSMITTER |
WO2007047173A2 (en) * | 2005-10-13 | 2007-04-26 | General Electric Company | High pressure alkali metal discharge lamp |
WO2007047173A3 (en) * | 2005-10-13 | 2008-03-06 | Gen Electric | High pressure alkali metal discharge lamp |
Also Published As
Publication number | Publication date |
---|---|
ES301568A1 (en) | 1965-01-01 |
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