GB1522036A - High pressure electric discharge lamps - Google Patents
High pressure electric discharge lampsInfo
- Publication number
- GB1522036A GB1522036A GB4669975A GB4669975A GB1522036A GB 1522036 A GB1522036 A GB 1522036A GB 4669975 A GB4669975 A GB 4669975A GB 4669975 A GB4669975 A GB 4669975A GB 1522036 A GB1522036 A GB 1522036A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- envelope
- axis
- electrode
- discharge
- 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
- H01J61/06—Main electrodes
- H01J61/073—Main electrodes for high-pressure discharge lamps
- H01J61/0732—Main electrodes for high-pressure discharge lamps characterised by the construction of the electrode
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
1522036 Metal vapour lamps GENERAL ELECTRIC CO Ltd 11 Nov 1976 [12 Nov 1975] 46699/75 Heading H1D In a h.p. discharge lamp with Hg, rare gas and one or more volatile metal halides, working at a total pressure of at least one atmosphere, with a tubular discharge envelope, e.g. of fixed silica, running horizontally, to improve temperature distribution and arc stability a W wire electrode at each end supported by a sealed-in lead 3, e.g. a Mo foil pinch, comprises outer 5, central 6, and inner 7 section with the outer 5 attached to the lead 3, the central section 6 running inclined to the axis towards some part of the cylindrical wall, and the inner section 7 extending into the discharge envelope so that it lies between the said part of the cylindrical wall and the axis, and the discharge path between the free ends lies parallel to the axis. Any of the sections of each electrode may include or be formed of a coil of wire 8 or the three sections may each be straight with a coil supported on one of them; an emissive material may be contained in a coil or coiled part of the electrode, in which case an outer coil may surround it. The lamp mounting should ensure that the inner ends of the electrodes lie at the lowermost position in the envelope. The end pinch seals of the electrodes should preferably be above the axis to avoid liquid halide attack on the sealed leads; an auxiliary electrode may also be fitted in the same pinch. A suitable lamp contains Hg, Xe or Ar, NaI, ScI 3 , and may be mounted in a glass outer envelope, which may contain N 2 and may be coated with an IR reflective coating of, e.g. SnO 2 or In 2 O 3 .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4669975A GB1522036A (en) | 1976-11-11 | 1976-11-11 | High pressure electric discharge lamps |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4669975A GB1522036A (en) | 1976-11-11 | 1976-11-11 | High pressure electric discharge lamps |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1522036A true GB1522036A (en) | 1978-08-23 |
Family
ID=10442250
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4669975A Expired GB1522036A (en) | 1976-11-11 | 1976-11-11 | High pressure electric discharge lamps |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1522036A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5055740A (en) * | 1987-02-25 | 1991-10-08 | Venture Lighting Interntional, Inc. | Horizontal burning metal halide lamp |
WO2016118989A1 (en) * | 2015-01-27 | 2016-08-04 | Plansee Se | Scattered-ray grid |
-
1976
- 1976-11-11 GB GB4669975A patent/GB1522036A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5055740A (en) * | 1987-02-25 | 1991-10-08 | Venture Lighting Interntional, Inc. | Horizontal burning metal halide lamp |
WO2016118989A1 (en) * | 2015-01-27 | 2016-08-04 | Plansee Se | Scattered-ray grid |
JP2018508765A (en) * | 2015-01-27 | 2018-03-29 | プランゼー エスエー | Scattered grid |
US10706984B2 (en) | 2015-01-27 | 2020-07-07 | Plansee Se | Anti-scatter grid |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |