GB691316A - Improvements relating to electric discharge lamps - Google Patents
Improvements relating to electric discharge lampsInfo
- Publication number
- GB691316A GB691316A GB800450A GB800450A GB691316A GB 691316 A GB691316 A GB 691316A GB 800450 A GB800450 A GB 800450A GB 800450 A GB800450 A GB 800450A GB 691316 A GB691316 A GB 691316A
- Authority
- GB
- United Kingdom
- Prior art keywords
- discharge
- lamp
- electrode
- march
- electrodes
- 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
Landscapes
- Discharge Lamp (AREA)
Abstract
691,316. Discharge lamps. BRITISH THOMSON-HOUSTON CO., Ltd., BEESON, E. J. G., and WEBB, A. A. March 6, 1951 [March 30, 1950], No. 8004/50. Drawings to Specification. Class 39(i). Each electrode of a discharge lamp has a tip in the form of a cone with a hemispherical end, said tips facing each other; the electrodes are of tungsten containing 3-5 per cent thoria, and may be massive, or slender rods. The lamp is of the compact source type with an electrode spacing of 3-5 mm., and is filled with a rare gas, e.g. xenon, possibly admixed with hydrogen, at ¢-2 atmospheres. With a xenon filling, the pressure is such that 2000 volts D.C. will not cause the discharge to strike until a pulse is applied to a starting electrode. The discharge may be continuous or an intermittent flash, and owing to the shape of the electrodes is localised at the tips, so that its path is always constant; thus the lamp can be accurately located relatively to an optical system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB800450A GB691316A (en) | 1950-03-30 | 1950-03-30 | Improvements relating to electric discharge lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB800450A GB691316A (en) | 1950-03-30 | 1950-03-30 | Improvements relating to electric discharge lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB691316A true GB691316A (en) | 1953-05-13 |
Family
ID=9843935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB800450A Expired GB691316A (en) | 1950-03-30 | 1950-03-30 | Improvements relating to electric discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB691316A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1122168B (en) * | 1960-07-08 | 1962-01-18 | Fruengel Frank Dr Ing | Spark discharge lamp with constant light emission, especially for visibility measurement and fog warning devices, and charger for your operation |
-
1950
- 1950-03-30 GB GB800450A patent/GB691316A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1122168B (en) * | 1960-07-08 | 1962-01-18 | Fruengel Frank Dr Ing | Spark discharge lamp with constant light emission, especially for visibility measurement and fog warning devices, and charger for your operation |
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