GB1477487A - High pressure sodium-vapour discharge lamp - Google Patents
High pressure sodium-vapour discharge lampInfo
- Publication number
- GB1477487A GB1477487A GB2339674A GB2339674A GB1477487A GB 1477487 A GB1477487 A GB 1477487A GB 2339674 A GB2339674 A GB 2339674A GB 2339674 A GB2339674 A GB 2339674A GB 1477487 A GB1477487 A GB 1477487A
- Authority
- GB
- United Kingdom
- Prior art keywords
- envelope
- electrodes
- electrode
- vapour
- alumina
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
1477487 Metal vapour lamps ITT INDUSTRIES Inc 24 May 1974 [25 May 1973 21 Nov 1973] 23396/74 Heading H1D In a high-pressure sodium-vapour discharge lamp one or more auxiliary electrodes is so arranged within the envelope as to bridge, nearly completely, the sustained operation discharge space between the main electrodes, thus defining an auxiliary discharge space with at least one of the main electrodes which is very much smaller than the sustained discharge space. As shown in Fig. 1, a starting electrode 4 is connected to one main electrode 3 and extends to a short distance from the other main electrode 2. The electrodes lie within the inner alumina envelope 13, which is in turn enclosed by a glass envelope 14. Leads are sealed into the alumina envelope 13 by concentric metal tubes made of alumina, titanium, vanadium and niobium. Envelope 13 may be filled with Hg and Na vapour, and a starting gas such as A, Xe, or a mixture of inert gases. Envelope 14 is evacuated. Electrode 4 may be of helical form, and may form gaps with both electrodes' Fig. 3, not shown), and may be formed as a conductive strip layer deposited on the inside of envelope 13.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7319084A FR2231107A1 (en) | 1973-05-25 | 1973-05-25 | Sodium vapour high-pressure discharge lamp - having internal auxiliary electrode for short ignition discharge path |
| FR7341377A FR2251912A1 (en) | 1973-11-21 | 1973-11-21 | Sodium vapour high-pressure discharge lamp - having internal auxiliary electrode for short ignition discharge path |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1477487A true GB1477487A (en) | 1977-06-22 |
Family
ID=26217736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2339674A Expired GB1477487A (en) | 1973-05-25 | 1974-05-24 | High pressure sodium-vapour discharge lamp |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE2424294A1 (en) |
| GB (1) | GB1477487A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1641023A2 (en) * | 2004-09-27 | 2006-03-29 | Osram-Sylvania Inc. | Ignition aid for high intensity discharge lamp |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4037129A (en) * | 1976-03-10 | 1977-07-19 | Gte Sylvania Incorporated | High pressure sodium vapor lamp having low starting voltage |
| US4939417A (en) * | 1988-12-20 | 1990-07-03 | Gte Products Corporation | High pressure discharge lamp with incandescent filament for starting |
-
1974
- 1974-05-18 DE DE19742424294 patent/DE2424294A1/en not_active Withdrawn
- 1974-05-24 GB GB2339674A patent/GB1477487A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1641023A2 (en) * | 2004-09-27 | 2006-03-29 | Osram-Sylvania Inc. | Ignition aid for high intensity discharge lamp |
| EP1641023A3 (en) * | 2004-09-27 | 2007-03-14 | Osram-Sylvania Inc. | Ignition aid for high intensity discharge lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2424294A1 (en) | 1974-12-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |