GB619721A - Improvements in or relating to low-pressure electric discharge lamps - Google Patents
Improvements in or relating to low-pressure electric discharge lampsInfo
- Publication number
- GB619721A GB619721A GB3750046A GB3750046A GB619721A GB 619721 A GB619721 A GB 619721A GB 3750046 A GB3750046 A GB 3750046A GB 3750046 A GB3750046 A GB 3750046A GB 619721 A GB619721 A GB 619721A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tubes
- discharge
- discharge lamps
- common electrode
- 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
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
- H01J61/10—Shields, screens, or guides for influencing the discharge
- H01J61/103—Shields, screens or guides arranged to extend the discharge path
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
619,721. Discharge lamps. GENERAL ELECTRIC CO., Ltd., JENKINS, H. G., and MILES, E. E. Dec. 20, 1946, No. 37500. [Class 39 (i)] A positive column discharge lamp of the activated hot-cathode type has within the envelope 1, Fig. 1, a pair of straight glass tubes 2 and 3 each closed at the same end. Within each closed end is an electrode 4, 5, and by connecting them to an A.C. source 9, 10 a U- shaped discharge 11 is produced. The arrangement may be " doubled by having four tubes, Fig. 2 (not shown), or three, in which case two discharge paths have a common electrode. Fig. 3 shows a modification with the discharge taking place between electrodes 17, 18, 19, 20, all connected together and a common electrode 21 facing the open ends of the tubes. Figs. 4 and 5 (not shown) illustrate an embodiment in which the tubes are grouped in a bundle instead of side by side as in Fig. 3. The tubes may have a luminescent coating, and the outer envelope may be translucent. A suitable filling is mercury vapour and argon. According to the Provisional Specification the invention is also applicable to cold-cathode tubes. Specification 465,135 and U.S.A. Specifications 1,984,215 and 2,255,431 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3750046A GB619721A (en) | 1946-12-20 | 1946-12-20 | Improvements in or relating to low-pressure electric discharge lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3750046A GB619721A (en) | 1946-12-20 | 1946-12-20 | Improvements in or relating to low-pressure electric discharge lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB619721A true GB619721A (en) | 1949-03-14 |
Family
ID=10396933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3750046A Expired GB619721A (en) | 1946-12-20 | 1946-12-20 | Improvements in or relating to low-pressure electric discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB619721A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0000842A1 (en) * | 1977-08-10 | 1979-02-21 | Hitachi, Ltd. | Low pressure metal vapour discharge lamp |
| GB2145873A (en) * | 1983-07-18 | 1985-04-03 | Matsushita Electric Works Ltd | Tri-colour fluorescent lamp |
| GB2167895A (en) * | 1984-12-03 | 1986-06-04 | Matsushita Electric Works Ltd | Colored fluorescent lamp assembly |
| GB2198580A (en) * | 1986-10-31 | 1988-06-15 | Toshiba Kk | Fluorescent lamp generating different colour light beams |
| FR2648617A1 (en) * | 1989-06-17 | 1990-12-21 | Toshiba Lighting Technology Co | FLUORESCENT LAMP |
-
1946
- 1946-12-20 GB GB3750046A patent/GB619721A/en not_active Expired
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0000842A1 (en) * | 1977-08-10 | 1979-02-21 | Hitachi, Ltd. | Low pressure metal vapour discharge lamp |
| EP0037589A2 (en) * | 1977-08-10 | 1981-10-14 | Hitachi, Ltd. | Low pressure metal vapour discharge lamp |
| EP0037589A3 (en) * | 1977-08-10 | 1981-12-30 | Hitachi, Ltd. | Low pressure metal vapour discharge lamp |
| GB2145873A (en) * | 1983-07-18 | 1985-04-03 | Matsushita Electric Works Ltd | Tri-colour fluorescent lamp |
| GB2167895A (en) * | 1984-12-03 | 1986-06-04 | Matsushita Electric Works Ltd | Colored fluorescent lamp assembly |
| GB2167895B (en) * | 1984-12-03 | 1989-06-01 | Matsushita Electric Works Ltd | Colored fluorescent lamp assembly |
| GB2198580A (en) * | 1986-10-31 | 1988-06-15 | Toshiba Kk | Fluorescent lamp generating different colour light beams |
| US4835440A (en) * | 1986-10-31 | 1989-05-30 | Kabushiki Kaisha Toshiba | Fluorescent lamp generating different color light beams |
| GB2198580B (en) * | 1986-10-31 | 1990-05-02 | Toshiba Kk | Fluorescent lamp generating different colour light beams |
| FR2648617A1 (en) * | 1989-06-17 | 1990-12-21 | Toshiba Lighting Technology Co | FLUORESCENT LAMP |
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