GB1187100A - Improvements in or relating to Electric Discharge Lamps. - Google Patents
Improvements in or relating to Electric Discharge Lamps.Info
- Publication number
- GB1187100A GB1187100A GB4658967A GB4658967A GB1187100A GB 1187100 A GB1187100 A GB 1187100A GB 4658967 A GB4658967 A GB 4658967A GB 4658967 A GB4658967 A GB 4658967A GB 1187100 A GB1187100 A GB 1187100A
- Authority
- GB
- United Kingdom
- Prior art keywords
- boron
- aluminium
- vapour
- envelope
- monobromide
- 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
- H01J61/35—Vessels; Containers provided with coatings on the walls thereof; Selection of materials for the coatings
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
1,187,100. Coated lamp bulbs. GENERAL ELECTRIC & ENGLISH ELECTRIC COMPANIES Ltd. 23 Sept., 1968 [12 Oct., 1967], No. 46589/67. Heading B2K. [Also in Divisions C1 and H1] An electric discharge lamp comprises a fused silica envelope including having a transparent protective coating on the envelope interior consisting of aluminium oxide or boric oxide which has penetrated at least partially into the silica surface. The coating may be formed by heating the envelope surface to 800 to 1200‹C while exposed to a moisture free aluminium or boron halide vapour, alone or with hydrogen, or to a boron hydride vapour, the subsequent aluminium or boron deposition on the envelope surface producing discolouration thereof. The surface may then be heated in an oxidising atmosphere (e.g. air, oxygen or water vapour-inert gas (e.g. Ar) or N 2 mixture) to at least 800‹C until the discolouration is removed. The Al may be liberated from the vapour due to disproportionation (of aluminium monobromide for example), due to thermal dissociation (e.g. dissociation of boron halide, aluminium monobromide and boron tribromide at 1000‹C and boron from diborase vapour at 500‹C) or due to reduction (e.g. aluminium or boron trihalide with hydrogen).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4658967A GB1187100A (en) | 1967-10-12 | 1967-10-12 | Improvements in or relating to Electric Discharge Lamps. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4658967A GB1187100A (en) | 1967-10-12 | 1967-10-12 | Improvements in or relating to Electric Discharge Lamps. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1187100A true GB1187100A (en) | 1970-04-08 |
Family
ID=10441850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4658967A Expired GB1187100A (en) | 1967-10-12 | 1967-10-12 | Improvements in or relating to Electric Discharge Lamps. |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1187100A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2284861A1 (en) * | 2008-05-05 | 2011-02-16 | Yancheng Haomali Lighting Science & Technology Co., Ltd. | Compound hid electric arc tube |
-
1967
- 1967-10-12 GB GB4658967A patent/GB1187100A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2284861A1 (en) * | 2008-05-05 | 2011-02-16 | Yancheng Haomali Lighting Science & Technology Co., Ltd. | Compound hid electric arc tube |
| EP2284861A4 (en) * | 2008-05-05 | 2011-10-26 | Yancheng Haomai Lighting Science & Technology Co Ltd | Compound hid electric arc tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |