GB550375A - Improvements in and relating to vapour lamps - Google Patents
Improvements in and relating to vapour lampsInfo
- Publication number
- GB550375A GB550375A GB13966/41A GB1396641A GB550375A GB 550375 A GB550375 A GB 550375A GB 13966/41 A GB13966/41 A GB 13966/41A GB 1396641 A GB1396641 A GB 1396641A GB 550375 A GB550375 A GB 550375A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bulb
- envelope
- cathode
- vapour
- mercury
- 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
- H01J61/24—Means for obtaining or maintaining the desired pressure within the vessel
- H01J61/28—Means for producing, introducing, or replenishing gas or vapour during operation of the lamp
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
550,375. Metal-vapour lamps. BRITISH THOMSON-HOUSTON CO., Ltd. Oct. 30, 1941, No. 13966. Convention date, Nov. 2, 1940. [Class 39 (i)] Mercury vapour discharge lamps comprise an envelope 2 having a bulb portion 6 in which are disposed the electrodes 10; 3 and a mercury pool 11, and an extended portion 5 sufficiently spaced from the bulb portion to be at a lower temperature and provide a condensation chamber for the mercury vapour, clear of the light emitting portion of the bulb. The envelope may be of glass or quartz, and the stem 12 may be positioned in the portion 5. The anode 3 is in the form of a tungsten rod with a bead 7 disposed immediately under the cathode, and its' lead has preferably a loop 8 to increase its length. The cathode which is provided with a shield 9, consists of three layers of fine tungsten wire wound alternately in opposite directions on a thicker wire, the whole then being coiled and activated by dipping in molten barium hydroxide or otherwise coated.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US364019A US2326346A (en) | 1940-11-02 | 1940-11-02 | Vapor lamp for sound recording |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB550375A true GB550375A (en) | 1943-01-05 |
Family
ID=23432687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13966/41A Expired GB550375A (en) | 1940-11-02 | 1941-10-30 | Improvements in and relating to vapour lamps |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2326346A (en) |
| FR (1) | FR877123A (en) |
| GB (1) | GB550375A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2532463A (en) * | 1949-03-23 | 1950-12-05 | Hanovia Chemical & Mfg Co | Temperature calibrated metal vapor discharge lamp |
-
1940
- 1940-11-02 US US364019A patent/US2326346A/en not_active Expired - Lifetime
-
1941
- 1941-10-30 GB GB13966/41A patent/GB550375A/en not_active Expired
- 1941-11-21 FR FR877123D patent/FR877123A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR877123A (en) | 1942-11-27 |
| US2326346A (en) | 1943-08-10 |
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