GB1164293A - Improvements in or relating to Electric Discharge Lamps. - Google Patents
Improvements in or relating to Electric Discharge Lamps.Info
- Publication number
- GB1164293A GB1164293A GB863067A GB863067A GB1164293A GB 1164293 A GB1164293 A GB 1164293A GB 863067 A GB863067 A GB 863067A GB 863067 A GB863067 A GB 863067A GB 1164293 A GB1164293 A GB 1164293A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrode
- shield
- envelope
- lamp
- seal
- 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
- H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
- H01J61/361—Seals between parts of vessel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
- H01J5/20—Seals between parts of vessels
- H01J5/22—Vacuum-tight joints between parts of vessel
- H01J5/26—Vacuum-tight joints between parts of vessel between insulating and conductive parts of vessel
-
- 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
- H01J61/045—Thermic screens or reflectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0033—Vacuum connection techniques applicable to discharge tubes and lamps
- H01J2893/0037—Solid sealing members other than lamp bases
- H01J2893/0041—Direct connection between insulating and metal elements, in particular via glass material
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
1,164,293. Metal-vapour lamps. GENERAL ELECTRIC & ENGLISH ELECTRIC COMPANIES Ltd. 7 July, 1967 [14 July, 1966; 23 Feb., 1967], Nos. 31723/66 and 8630/67. Heading H1D. In a lamp as described in Specification 1,065,023 having an envelope 1 of material having an alumina content exceeding 85% by weight to which a niobium closure member 3 supporting an electrode 7 is sealed by a layer 5 consisting of at least one of the metals Ti, Zr, Va, Hf optionally together with Nb, as described in Specification 1,094,052, a shield 16 of refractory material is provided to protect the seal 5 from wandering of the discharge during starting of the lamp. The shield may be an annular disc of ceramic material similar to that of the envelope 1 fitted around the electrode 7 near the seal 5, or may be of metal, e.g. W or Mo, fitted near the discharge end of the electrode. Alternatively the shield may be a frusto -conical member of sheet metal or of coiled wire, in which case it may form an extension of either the innner coil 8 or (as shown) of the outer coil 15 of two tungsten coils retaining electron emissive material 9 on the electrode 7. A cylindrical extension 17 of the shield lies near the envelope 1. In a modification (Fig. 2, not shown), a frusto-conical coiled wire shield mounted with the narrow end towards the seal has at the wide end a cylindrical extension in contact with the lamp envelope and at the narrow end a cylindrical extension fitting closely around the electrode and in contact with the exhaust tube 12 or with the closure member. The lamp which has a filling of sodium, mercury and argon is mounted in an outer glass envelope.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19671589174 DE1589174A1 (en) | 1966-07-14 | 1967-07-13 | Electric discharge lamp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3172366 | 1966-07-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1164293A true GB1164293A (en) | 1969-09-17 |
Family
ID=10327424
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB863067A Expired GB1164293A (en) | 1966-07-14 | 1966-07-14 | Improvements in or relating to Electric Discharge Lamps. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1164293A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2248718A (en) * | 1990-07-20 | 1992-04-15 | Samsung Electronic Devices | Metal halide lamp. |
-
1966
- 1966-07-14 GB GB863067A patent/GB1164293A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2248718A (en) * | 1990-07-20 | 1992-04-15 | Samsung Electronic Devices | Metal halide lamp. |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |