GB486394A - High pressure metallic vapour electric discharge lamp - Google Patents
High pressure metallic vapour electric discharge lampInfo
- Publication number
- GB486394A GB486394A GB29223/37A GB2922337A GB486394A GB 486394 A GB486394 A GB 486394A GB 29223/37 A GB29223/37 A GB 29223/37A GB 2922337 A GB2922337 A GB 2922337A GB 486394 A GB486394 A GB 486394A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mms
- activated
- rod
- helix
- oct
- 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
- H01J61/84—Lamps with discharge constricted by high pressure
- H01J61/86—Lamps with discharge constricted by high pressure with discharge additionally constricted by close spacing of electrodes, e.g. for optical projection
Abstract
486,394. Discharge lamps. VEREINIGTE GLUHLAMPEN UND ELEKTRICITATS AKT.-GES. Oct. 26, 1937, No. 29223. Convention date, Oct. 26, 1936. [Class 39 (i)] In a high-pressure metallic vapour lamp, the bulb has its greatest internal dimension less than 20 mms. and its smallest dimension greater than the distance between the electrodes, and at least one electrode has two parts, one of which is activated and is heated by the other part which is not activated but is heated by thermal conduction or radiation from the discharge. In the form shown, the spherical refractory glass bulb 1 has a diameter of 5-6 mms. and contains two electrodes spaced 2 mms. apart and each consisting of an activated tungsten rod 4 surrounded by a helix 3. The filling is a rare gas at 25 mms. pressure and mercury and the lamp dissipates 10 watts on 110 volts supply with an efficiency of 35-40 lumens / watt. In other forms of electrode, the activating material may be coated at the bottom of a metal cap, or on a rod surrounded by a metal cylinder or by a helix 11, Fig. 4, wound on a second coil 12 directly surrounding the rod 10.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE486394X | 1936-10-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB486394A true GB486394A (en) | 1938-06-02 |
Family
ID=6543441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB29223/37A Expired GB486394A (en) | 1936-10-26 | 1937-10-26 | High pressure metallic vapour electric discharge lamp |
Country Status (3)
| Country | Link |
|---|---|
| FR (1) | FR828257A (en) |
| GB (1) | GB486394A (en) |
| NL (1) | NL48212C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1086344B (en) * | 1956-07-13 | 1960-08-04 | Pat & Visseaux Claude | Cold hollow electrode for electric discharge lamps with a mercury vapor and gas atmosphere |
| GB2173943A (en) * | 1985-04-18 | 1986-10-22 | Noblelight Limited | Improvements in and relating to cathodes |
| GB2216332A (en) * | 1988-02-18 | 1989-10-04 | Gen Electric | Xenon discharge lamp |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE883782C (en) * | 1938-06-24 | 1953-07-20 | Westinghouse Electric Corp | High pressure electric discharge device |
-
0
- NL NL48212D patent/NL48212C/xx active
-
1937
- 1937-10-25 FR FR828257D patent/FR828257A/en not_active Expired
- 1937-10-26 GB GB29223/37A patent/GB486394A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1086344B (en) * | 1956-07-13 | 1960-08-04 | Pat & Visseaux Claude | Cold hollow electrode for electric discharge lamps with a mercury vapor and gas atmosphere |
| GB2173943A (en) * | 1985-04-18 | 1986-10-22 | Noblelight Limited | Improvements in and relating to cathodes |
| GB2216332A (en) * | 1988-02-18 | 1989-10-04 | Gen Electric | Xenon discharge lamp |
| GB2216332B (en) * | 1988-02-18 | 1992-09-23 | Gen Electric | Xenon lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| FR828257A (en) | 1938-05-13 |
| NL48212C (en) |
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