GB599489A - Improvements in and relating to electric discharge lamps - Google Patents
Improvements in and relating to electric discharge lampsInfo
- Publication number
- GB599489A GB599489A GB1933943A GB1933943A GB599489A GB 599489 A GB599489 A GB 599489A GB 1933943 A GB1933943 A GB 1933943A GB 1933943 A GB1933943 A GB 1933943A GB 599489 A GB599489 A GB 599489A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- envelope
- pressure
- seals
- welded
- 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
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract 2
- 229910052753 mercury Inorganic materials 0.000 abstract 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N argon Substances [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 abstract 1
- 229910052786 argon Inorganic materials 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 238000007872 degassing Methods 0.000 abstract 1
- 239000005350 fused silica glass Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 229910052743 krypton Inorganic materials 0.000 abstract 1
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton(0) Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 abstract 1
- 229910052750 molybdenum Inorganic materials 0.000 abstract 1
- 239000011733 molybdenum Substances 0.000 abstract 1
- 229910052904 quartz Inorganic materials 0.000 abstract 1
- 239000010453 quartz Substances 0.000 abstract 1
- 239000003870 refractory metal Substances 0.000 abstract 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract 1
- 229910052721 tungsten Inorganic materials 0.000 abstract 1
- 239000010937 tungsten Substances 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
- 229910052724 xenon Inorganic materials 0.000 abstract 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon(0) Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
- H01J61/822—High-pressure mercury lamps
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
599,489. Discharge lamps. BRITISH THOMSON-HOUSTON CO., Ltd. (General Electric Co.). Nov. 19, 1943, No. 19339. [Class 39 (i)] [Also in Group XXXV] High-pressure mercury vapour lamp has an envelope 10 of fused quartz of cylindrical form, with the ends rounded off on curves of radius greater than the diameter of the internal bore of the envelope with an intermediate arc of less radius than the bore. The electrodes 12 are of unactivated refractory metal, such as tungsten, being formed by a close winding of heavy wire about the lead-in wires 17 to which they are welded, and are positioned substantially in contact with the ends of the envelope. The filling is mercury 15 giving an unsaturated vapour pressure of 5-10 atmospheres, with a rare gas filling-argon, krypton, xenon, &c., at 20-100 m.m. Hg. pressure. The seals are of molybdenum ribbon 18, reinforced at the ends by strips of the same metal, welded to lead wires 17, 19. The tube is made from quartz tubing of uniform diameter which is collapsed about the seals after the usual degassing and evacuation processes. Cooling is by a low-pressure air current from a jet 27 - directed at the middle part of the lamp, which may be mounted at the focus of a reflector, Fig. 3, (not shown). The operating circuit comprises an auto-transformer and ballast resistance 31 across the terminals of the lamp ; a shunt 35 with a normally closed self-closing switch 34 is opened by the magnet coil 33 when the lamp is switched on to provide the necessary voltage surge for starting. Specifications 503,112, 507,445 and 530,176 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US460913A US2353668A (en) | 1942-10-05 | 1942-10-05 | Electric discharge device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB599489A true GB599489A (en) | 1948-03-15 |
Family
ID=1734641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1933943A Expired GB599489A (en) | 1942-10-05 | 1943-11-19 | Improvements in and relating to electric discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB599489A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1278607B (en) * | 1965-06-10 | 1968-09-26 | Patra Patent Treuhand | Double bulb discharge lamp |
| DE3319021A1 (en) * | 1982-05-28 | 1983-12-01 | The General Electric Co. p.l.c., London | AIR BULBS AND DISCHARGE LAMPS |
-
1943
- 1943-11-19 GB GB1933943A patent/GB599489A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1278607B (en) * | 1965-06-10 | 1968-09-26 | Patra Patent Treuhand | Double bulb discharge lamp |
| DE3319021A1 (en) * | 1982-05-28 | 1983-12-01 | The General Electric Co. p.l.c., London | AIR BULBS AND DISCHARGE LAMPS |
| GB2122024A (en) * | 1982-05-28 | 1984-01-04 | Gen Electric Co Plc | Lamp stems |
| US4682071A (en) * | 1982-05-28 | 1987-07-21 | The General Electric Company, P.L.C. | Lamps and ribbon seals |
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