GB868921A - Improvements relating to electric discharge incandescent lamps - Google Patents
Improvements relating to electric discharge incandescent lampsInfo
- Publication number
- GB868921A GB868921A GB2688856A GB2688856A GB868921A GB 868921 A GB868921 A GB 868921A GB 2688856 A GB2688856 A GB 2688856A GB 2688856 A GB2688856 A GB 2688856A GB 868921 A GB868921 A GB 868921A
- Authority
- GB
- United Kingdom
- Prior art keywords
- discharge
- sept
- electrodes
- electric discharge
- incandescence
- 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
- H01J61/30—Vessels; Containers
- H01J61/33—Special shape of cross-section, e.g. for producing cool spot
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
868,921. Discharge lamps. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Sept. 3, 1957 [Sept. 3, 1956], No. 26888/56. Drawings to Specification. Class 39(1). In a light source, the heat developed by an arc discharge between two electrodes in a metal vapour and/or a rare gas, is used to heat to incandescence, i.e. a temperature of above 1600‹C, the inner wall of a capillary tube, i.e a tube having a bore not greater than 0.5 mm, of silica or crystalline magnesia, which materials possess an absorption band in the ultra-violet region which moves towards and into the visible region at the high temperature required to produce incandescence. The capillary tube constitutes part of the sealed envelope containing the discharge and has enlarged ends in which the electrodes are located. The envelope may contain argon at a pressure of 20 mms of Hg. Specifications 476,774 and 522,106 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2688856A GB868921A (en) | 1956-09-03 | 1956-09-03 | Improvements relating to electric discharge incandescent lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2688856A GB868921A (en) | 1956-09-03 | 1956-09-03 | Improvements relating to electric discharge incandescent lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB868921A true GB868921A (en) | 1961-05-25 |
Family
ID=10250773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2688856A Expired GB868921A (en) | 1956-09-03 | 1956-09-03 | Improvements relating to electric discharge incandescent lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB868921A (en) |
-
1956
- 1956-09-03 GB GB2688856A patent/GB868921A/en not_active Expired
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