GB1026069A - Arc discharge lamp - Google Patents
Arc discharge lampInfo
- Publication number
- GB1026069A GB1026069A GB53057/64A GB5305764A GB1026069A GB 1026069 A GB1026069 A GB 1026069A GB 53057/64 A GB53057/64 A GB 53057/64A GB 5305764 A GB5305764 A GB 5305764A GB 1026069 A GB1026069 A GB 1026069A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- electrode
- stem
- conductor
- dec
- 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
- H01J61/50—Auxiliary parts or solid material within the envelope for reducing risk of explosion upon breakage of the envelope, e.g. for use in mines
-
- 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
- H01J61/067—Main electrodes for low-pressure discharge lamps
- H01J61/0672—Main electrodes for low-pressure discharge lamps characterised by the construction of the electrode
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
1,026,069. Discharge lamps. SYLVANIA ELECTRIC PRODUCTS Inc. Dec. 31, 1964 [Dec. 31, 1963], No. 53057/64. Heading H1D. An arc discharge lamp, particularly a fluorescent lamp, having an electrode filament supported by leads 3, 4 extending through stem 2, has a conductor 13 extending from an internal part 3b of one of the leads to a thinwalled portion 2a of the stem adjacent an external part 3a of the lead, so that if the electrode filament burns out, the arc is directed by conductor 13 through wall portion 2a to external lead 3a, and is extinguished by perforation of the wall. This arrangement prevents overheating of internal parts of the electrode support which might break the side walls 1 of the envelope, and prevents a weak flickering discharge which might damage the current-limiting ballast in the lamp fitting. The nickel-plated iron wire conductor 13 shown may be replaced by a conductive coating on the stem comprising colloidal graphite or nickel powder in a potassium silicate binder. The electrode filament may be associated with an auxiliary electrode, Fig. 1 (not shown), and is mounted in front of a shielding disc 11. A base 7 with terminals 5 is cemented to each end of the lamp.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US334884A US3265917A (en) | 1963-12-31 | 1963-12-31 | Fail-safe arc discharge lamp with integral arc extinguishing means |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1026069A true GB1026069A (en) | 1966-04-14 |
Family
ID=23309284
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB53057/64A Expired GB1026069A (en) | 1963-12-31 | 1964-12-31 | Arc discharge lamp |
Country Status (2)
Country | Link |
---|---|
US (1) | US3265917A (en) |
GB (1) | GB1026069A (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3562571A (en) * | 1969-06-12 | 1971-02-09 | Westinghouse Electric Corp | Mercury-vapor discharge lamp with amalgam-type vapor-pressure regualtor and integral fail-safe and fast warmup compone |
US4105910A (en) * | 1976-04-23 | 1978-08-08 | Westinghouse Electric Corp. | Fluorescent lamp with an integral fail-safe and auxiliary-amalgam component |
US4495440A (en) * | 1982-08-23 | 1985-01-22 | Gte Products Corporation | Arc-extinguishing ampul and fluorescent lamp having such ampul mounted on each electrode structure |
US5210461A (en) * | 1992-02-18 | 1993-05-11 | Gte Products Corporation | Arc discharge lamp containing mechanism for extinguishing arc at end-of-life |
US5276379A (en) * | 1992-02-18 | 1994-01-04 | Gte Products Corporation | Arc discharge lamp having cementless base members |
US5923121A (en) * | 1997-10-14 | 1999-07-13 | Osram Sylvania Inc. | Fluorescent lamp having an attachment therein for reduction of soluble mercury in the lamp and to act as a fail-safe at the end of lamp life |
US6211618B1 (en) * | 1999-04-27 | 2001-04-03 | Philips Electronics North America Corp. | Arc discharge lamp with bimetal strip for fast passive lamp failure |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2146579A (en) * | 1936-04-22 | 1939-02-07 | Gen Electric | Electric discharge lamp |
US2422828A (en) * | 1941-10-10 | 1947-06-24 | Eitel Mccullough Inc | Thermionic tube |
US2692347A (en) * | 1951-03-28 | 1954-10-19 | Westinghouse Electric Corp | Metalized stems for low-pressure discharge tubes |
-
1963
- 1963-12-31 US US334884A patent/US3265917A/en not_active Expired - Lifetime
-
1964
- 1964-12-31 GB GB53057/64A patent/GB1026069A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3265917A (en) | 1966-08-09 |
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