GB1243000A - Low-pressure sodium vapour discharge lamp - Google Patents
Low-pressure sodium vapour discharge lampInfo
- Publication number
- GB1243000A GB1243000A GB26828/70A GB2682870A GB1243000A GB 1243000 A GB1243000 A GB 1243000A GB 26828/70 A GB26828/70 A GB 26828/70A GB 2682870 A GB2682870 A GB 2682870A GB 1243000 A GB1243000 A GB 1243000A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bulges
- electrodes
- wall
- discharge
- nearest
- 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
- H01J61/74—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a main light-emitting filling of difficult vaporisable metal vapour, e.g. sodium
-
- 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
- H01J61/34—Double-wall vessels or containers
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
1,243,000. Discharge lamps. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 3 June, 1970 [28 Feb., 1970], No. 26828/70. Heading H1D. A low-pressure Na vapour discharge lamp with U-shaped discharge tube 1 has electrodes 4, 5 at both ends, the tube wall has bulges a to g and is surrounded by an outer envelope 6 (e.g. of glass) wherein #/T#0À5, # being the overall volume of all bulges, e.g. a to d, whose distance to the nearest electrode is 10 to 35% of half the length of the discharge path (e.g. 96 cms.) and T the overall volume of all the bulges. This construction ensures the retention of more sodium near the electrodes in the bulges. A transparent heat reflecting layer 10 e.g. indium oxide, may extend over part of the length of the lamp between the outer wall of the discharge tube and the inner wall of the outer envelope and is preferably present only in areas whose distance to the nearest electrode is larger than the electrode to nearest bulge distance. In the drawing, bulges a and b are then cooler and Na transfer delayed. Relatively larger bulges near the electrodes are exemplified.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7002894.A NL165885C (en) | 1970-02-28 | 1970-02-28 | LOW PRESSURE SODIUM VAPOR DISCHARGE LAMP. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1243000A true GB1243000A (en) | 1971-08-18 |
Family
ID=19809463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB26828/70A Expired GB1243000A (en) | 1970-02-28 | 1970-06-03 | Low-pressure sodium vapour discharge lamp |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3646378A (en) |
| JP (1) | JPS4942396B1 (en) |
| BE (1) | BE749235A (en) |
| DE (1) | DE2027265C3 (en) |
| FR (1) | FR2080287A5 (en) |
| GB (1) | GB1243000A (en) |
| NL (1) | NL165885C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4794308A (en) * | 1970-08-06 | 1988-12-27 | Owens-Illinois Television Products Inc. | Multiple gaseous discharge display/memory panel having improved operating life |
| US4731560A (en) * | 1970-08-06 | 1988-03-15 | Owens-Illinois Television Products, Inc. | Multiple gaseous discharge display/memory panel having improved operating life |
| US4028578A (en) * | 1973-02-16 | 1977-06-07 | Owens-Illinois, Inc. | Gas discharge dielectric containing a source of boron, gallium, indium, or thallium |
| US4080545A (en) * | 1976-12-27 | 1978-03-21 | Xerox Corporation | Sodium vapor lamp with emission aperture |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB817100A (en) * | 1955-12-22 | 1959-07-22 | Gen Electric Co Ltd | Improvements in or relating to electric discharge lamps |
| FR1158700A (en) * | 1955-10-18 | 1958-06-18 | Philips Nv | Discharge tube, especially in sodium vapor and gas filled |
-
1970
- 1970-02-28 NL NL7002894.A patent/NL165885C/en not_active IP Right Cessation
- 1970-04-20 BE BE749235D patent/BE749235A/en unknown
- 1970-04-23 FR FR7014805A patent/FR2080287A5/fr not_active Expired
- 1970-06-03 DE DE2027265A patent/DE2027265C3/en not_active Expired
- 1970-06-03 GB GB26828/70A patent/GB1243000A/en not_active Expired
- 1970-06-09 JP JP45049234A patent/JPS4942396B1/ja active Pending
- 1970-06-22 US US48045A patent/US3646378A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE2027265C3 (en) | 1978-12-14 |
| JPS4942396B1 (en) | 1974-11-14 |
| DE2027265A1 (en) | 1971-12-02 |
| NL165885B (en) | 1980-12-15 |
| BE749235A (en) | 1970-10-20 |
| FR2080287A5 (en) | 1971-11-12 |
| US3646378A (en) | 1972-02-29 |
| NL7002894A (en) | 1971-08-31 |
| DE2027265B2 (en) | 1978-04-20 |
| NL165885C (en) | 1981-05-15 |
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