GB448706A - Improvements in and relating to electric discharge lamps - Google Patents
Improvements in and relating to electric discharge lampsInfo
- Publication number
- GB448706A GB448706A GB35720/34A GB3572034A GB448706A GB 448706 A GB448706 A GB 448706A GB 35720/34 A GB35720/34 A GB 35720/34A GB 3572034 A GB3572034 A GB 3572034A GB 448706 A GB448706 A GB 448706A
- Authority
- GB
- United Kingdom
- Prior art keywords
- arc
- lengthen
- inductance
- lamp
- discharge lamps
- 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
- H01J61/10—Shields, screens, or guides for influencing the discharge
- H01J61/106—Shields, screens, or guides for influencing the discharge using magnetic means
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Discharge Lamp (AREA)
Abstract
448,706. Discharge lamps. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London, and DAVIES, L. J., 147, Murray Road, Rugby. Dec. 12, 1934, No. 35720. [Class 39 (i)] A lamp of the type in which the filling of gas and metal vapour is such that the discharge starts as a glow and changes to a constricted arc has a low work-function cathode arranged near to the anode and means for creating a magnetic field to deflect and lengthen the arc. The magnetic means may be so arranged that increase of the arc length which is accompanied by voltage increase, compensates for the negative resistance of the lamp. In one form, two self - heating electrodes 1, 2 are arranged close together in a pear-shaped envelope 6 which is enclosed in an evacuated or oxygen-filled container 9 carrying a cap 10 in which an inductance 7, serving to lengthen the arc 8, is mounted. The envelope 6 is mounted on a frame 11 supported by a band 12 on the pinch 13. The inductance may be arranged below the arc.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB35720/34A GB448706A (en) | 1934-12-12 | 1934-12-12 | Improvements in and relating to electric discharge lamps |
US53320A US2087753A (en) | 1934-12-12 | 1935-12-07 | Electric discharge lamp |
FR798984D FR798984A (en) | 1934-12-12 | 1935-12-10 | Improvements to discharge tubes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB35720/34A GB448706A (en) | 1934-12-12 | 1934-12-12 | Improvements in and relating to electric discharge lamps |
Publications (1)
Publication Number | Publication Date |
---|---|
GB448706A true GB448706A (en) | 1936-06-12 |
Family
ID=10380839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB35720/34A Expired GB448706A (en) | 1934-12-12 | 1934-12-12 | Improvements in and relating to electric discharge lamps |
Country Status (3)
Country | Link |
---|---|
US (1) | US2087753A (en) |
FR (1) | FR798984A (en) |
GB (1) | GB448706A (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2612625A (en) * | 1946-11-23 | 1952-09-30 | Ericsson Telefon Ab L M | Gaseous discharge tube |
DE1091669B (en) * | 1948-12-18 | 1960-10-27 | Patra Patent Treuhand | High pressure discharge lamp |
DE1117753B (en) * | 1959-01-14 | 1961-11-23 | A E I Lamp And Lighting Co Ltd | Circuit arrangement for electric high pressure discharge lamps |
DE1539461B1 (en) * | 1966-07-28 | 1970-05-14 | Licentia Gmbh | Headlights with defocusing device |
JPS53136374A (en) * | 1977-05-04 | 1978-11-28 | Hitachi Ltd | Low pressure vapor discharge lamp |
US4311942A (en) * | 1977-09-21 | 1982-01-19 | Spellman High Voltage Electronics Corp. | Compact fluorescent lamp and method and means for magnetic arc spreading |
US4514662A (en) * | 1979-06-04 | 1985-04-30 | Skeist S Merrill | Magnetic arc spreading fluorescent lamps |
US4311943A (en) * | 1979-11-13 | 1982-01-19 | Spellman High Voltage Electronics Corp. | Fluorescent lamp with arc spreading with recombination structures |
US4341979A (en) * | 1980-02-14 | 1982-07-27 | Leo Gross | Fluorescent lamp with rotating magnetic field arc spreading device |
DE4429413C2 (en) * | 1994-08-19 | 1998-11-19 | Imab Stiftung | Method for operating a discharge lamp |
NL1026622C2 (en) * | 2004-07-09 | 2006-01-10 | Crossworks Contra Consulting B | Gas discharge lamp with stabilizing coil. |
-
1934
- 1934-12-12 GB GB35720/34A patent/GB448706A/en not_active Expired
-
1935
- 1935-12-07 US US53320A patent/US2087753A/en not_active Expired - Lifetime
- 1935-12-10 FR FR798984D patent/FR798984A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR798984A (en) | 1936-05-29 |
US2087753A (en) | 1937-07-20 |
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