GB910482A - Improvements relating to low pressure metal vapour electric discharge lamps - Google Patents
Improvements relating to low pressure metal vapour electric discharge lampsInfo
- Publication number
- GB910482A GB910482A GB624858A GB624858A GB910482A GB 910482 A GB910482 A GB 910482A GB 624858 A GB624858 A GB 624858A GB 624858 A GB624858 A GB 624858A GB 910482 A GB910482 A GB 910482A
- Authority
- GB
- United Kingdom
- Prior art keywords
- envelope
- discharge lamps
- low pressure
- electric discharge
- improvements relating
- 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
- H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
- H01J61/72—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a main light-emitting filling of easily vaporisable metal vapour, e.g. mercury
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
910,482. Low-pressure discharge lamps. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Feb. 24, 1959 [Feb. 26, 1958], No. 6248/58. Class 39 (1). The envelope of a low-pressure mercury vapour fluorescent discharge lamp is provided with outwardly - projecting circumferential grooves which provide cool regions for the condensation of the mercury vapour filling and provide a means for regulating the operating pressure, the grooves being located at oneeighth of the envelope length from each end of the envelope. The grooves can be formed by rotating an indenting finger within the envelope whilst it is heated in the region in which the groove is to be formed. According to the Provisional Specification the filling can be sodium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB624858A GB910482A (en) | 1958-02-26 | 1958-02-26 | Improvements relating to low pressure metal vapour electric discharge lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB624858A GB910482A (en) | 1958-02-26 | 1958-02-26 | Improvements relating to low pressure metal vapour electric discharge lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB910482A true GB910482A (en) | 1962-11-14 |
Family
ID=9811095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB624858A Expired GB910482A (en) | 1958-02-26 | 1958-02-26 | Improvements relating to low pressure metal vapour electric discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB910482A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2281148A (en) * | 1993-08-21 | 1995-02-22 | Samsung Display Devices Co Ltd | High intensity discharge lamp |
-
1958
- 1958-02-26 GB GB624858A patent/GB910482A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2281148A (en) * | 1993-08-21 | 1995-02-22 | Samsung Display Devices Co Ltd | High intensity discharge lamp |
| GB2281148B (en) * | 1993-08-21 | 1997-09-17 | Samsung Display Devices Co Ltd | High-intensity discharge lamp |
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