GB1441471A - Electric discharge lamps - Google Patents
Electric discharge lampsInfo
- Publication number
- GB1441471A GB1441471A GB172474A GB172474A GB1441471A GB 1441471 A GB1441471 A GB 1441471A GB 172474 A GB172474 A GB 172474A GB 172474 A GB172474 A GB 172474A GB 1441471 A GB1441471 A GB 1441471A
- Authority
- GB
- United Kingdom
- Prior art keywords
- halide
- scandium
- metal
- envelope
- coating
- 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
- 229910052751 metal Inorganic materials 0.000 abstract 5
- 239000002184 metal Substances 0.000 abstract 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 3
- 239000011248 coating agent Substances 0.000 abstract 3
- 238000000576 coating method Methods 0.000 abstract 3
- 150000004820 halides Chemical class 0.000 abstract 3
- 229910052706 scandium Inorganic materials 0.000 abstract 3
- FVAUCKIRQBBSSJ-UHFFFAOYSA-M sodium iodide Chemical compound [Na+].[I-] FVAUCKIRQBBSSJ-UHFFFAOYSA-M 0.000 abstract 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 abstract 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract 2
- 229910052753 mercury Inorganic materials 0.000 abstract 2
- 239000001301 oxygen Substances 0.000 abstract 2
- 229910052760 oxygen Inorganic materials 0.000 abstract 2
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 abstract 2
- HUIHCQPFSRNMNM-UHFFFAOYSA-K scandium(3+);triiodide Chemical compound [Sc+3].[I-].[I-].[I-] HUIHCQPFSRNMNM-UHFFFAOYSA-K 0.000 abstract 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 abstract 1
- 239000003570 air Substances 0.000 abstract 1
- 229910052786 argon Inorganic materials 0.000 abstract 1
- 238000000354 decomposition reaction Methods 0.000 abstract 1
- 239000005350 fused silica glass Substances 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 abstract 1
- 238000011065 in-situ storage Methods 0.000 abstract 1
- 239000011261 inert gas Substances 0.000 abstract 1
- 229910052746 lanthanum Inorganic materials 0.000 abstract 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 abstract 1
- 229910001507 metal halide Inorganic materials 0.000 abstract 1
- 150000005309 metal halides Chemical class 0.000 abstract 1
- 239000002923 metal particle Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 230000001590 oxidative effect Effects 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 229910052761 rare earth metal Inorganic materials 0.000 abstract 1
- 150000002910 rare earth metals Chemical class 0.000 abstract 1
- -1 scandium halide Chemical class 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000009518 sodium iodide Nutrition 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 229910052727 yttrium Inorganic materials 0.000 abstract 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 abstract 1
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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Discharge Lamp (AREA)
Abstract
1441471 Metal vapour discharge lamps GENERAL ELECTRIC CO Ltd 14 Jan 1975 [14 Jan 1974] 01724/74 Heading H1D A discharge lamp having a fused silica envelope and a filling including mercury, a scandium halide and possibly another metal halide (neither halide being a fluoride) and the pressure being greater than one atmosphere, has on the interior surface of the envelope a coating of at least one of the oxides of scandium, yttrium, lanthanum and the rare earth metals, the coating at least partially penetrating the surface of the silica. The oxide can be applied by forming a metal film which is then oxidized in situ prior to filling the envelope. The metal film in such a process can result from decomposition of a halide of the metal, e.g. a monohalide produced by passing a higher halide over particles of the metal, the monohalide being introduced, possibly with hydrogen, at a temperature of 900‹ to 1100‹ C., the metal film so formed being heated at 1000‹ to 1200‹ C. in an oxidizing atmosphere such as air, oxygen or inert gas with oxygen or water vapour. A typical filling is 20 mg. sodium iodide, 10 mg. scandium tri-iodide, 12 mg. mercury and argon at 20 torr at room temperature in an envelope having a diameter of 18 mm. and an arc length of 90 mm. To form the oxide coating such a lamp requires 4 mg. scandium and 12 mg. scandium tri-iodide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB172474A GB1441471A (en) | 1974-01-14 | 1974-01-14 | Electric discharge lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB172474A GB1441471A (en) | 1974-01-14 | 1974-01-14 | Electric discharge lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1441471A true GB1441471A (en) | 1976-06-30 |
Family
ID=9726903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB172474A Expired GB1441471A (en) | 1974-01-14 | 1974-01-14 | Electric discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1441471A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2124019A (en) * | 1982-07-09 | 1984-02-08 | Philips Nv | Low-pressure mercury vapour discharge lamp |
| GB2191888A (en) * | 1986-06-05 | 1987-12-23 | Ushio Electric Inc | Fused silica envelope for discharge lamp |
| EP0583122A1 (en) * | 1992-08-07 | 1994-02-16 | General Electric Company | ARC tube and ARC discharge lamp |
-
1974
- 1974-01-14 GB GB172474A patent/GB1441471A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2124019A (en) * | 1982-07-09 | 1984-02-08 | Philips Nv | Low-pressure mercury vapour discharge lamp |
| GB2191888A (en) * | 1986-06-05 | 1987-12-23 | Ushio Electric Inc | Fused silica envelope for discharge lamp |
| EP0583122A1 (en) * | 1992-08-07 | 1994-02-16 | General Electric Company | ARC tube and ARC discharge lamp |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4047067A (en) | Sodium halide discharge lamp with an alumina silicate barrier zone in fused silica envelope | |
| US3586898A (en) | Aluminum chloride discharge lamp | |
| GB1282805A (en) | High pressure mercury vapour discharge lamp with a metal halide additive | |
| GB1252829A (en) | ||
| GB1168460A (en) | High pressure electric discharge device | |
| GB1527903A (en) | High pressure metal halide lamps | |
| GB1330045A (en) | Small-sized fluorescent lamp | |
| GB1138913A (en) | Metal vapor discharge lamp | |
| GB1441471A (en) | Electric discharge lamps | |
| GB1130204A (en) | Improvements in or relating to electric discharge lamps | |
| JPS579048A (en) | Metal vapor discharge lamp | |
| GB1211176A (en) | High-pressure sodium vapor lamp | |
| US3385645A (en) | Method of dosing the arc tube of a mercury-additive lamp | |
| GB1330958A (en) | High-pressure sodium vapour discharge lamp | |
| US3821585A (en) | Tungsten halogen incandescent lamp with group iva metal getter and method of manufacture | |
| GB1522330A (en) | Discharge lamp | |
| GB1484469A (en) | Metal iodide vapour discharge lamp | |
| GB1502612A (en) | Discharge lamps containing an inert gas and a metal halid | |
| GB1444023A (en) | Electric discharge lamps | |
| GB1423981A (en) | Discharge lamp | |
| GB1311644A (en) | Jacketet alkali metal halide vapour lamp with getter | |
| GB1067923A (en) | High pressure electric discharge lamps | |
| GB1166311A (en) | Improvements in or relating to Methods of Manufacturing Getters. | |
| GB1205844A (en) | Improvements in photochemically useful arc lamps | |
| JPS5591560A (en) | Metal halide lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |