GB478208A - Improvements in and relating to electric discharge devices - Google Patents
Improvements in and relating to electric discharge devicesInfo
- Publication number
- GB478208A GB478208A GB19422/36A GB1942236A GB478208A GB 478208 A GB478208 A GB 478208A GB 19422/36 A GB19422/36 A GB 19422/36A GB 1942236 A GB1942236 A GB 1942236A GB 478208 A GB478208 A GB 478208A
- Authority
- GB
- United Kingdom
- Prior art keywords
- arc
- magnetic field
- relating
- electric discharge
- electrodes
- 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
- H01J17/00—Gas-filled discharge tubes with solid cathode
- H01J17/02—Details
- H01J17/14—Magnetic means for controlling the discharge
Landscapes
- Discharge Lamp (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
478,208. Discharge lamps. BRITISH THOMSON - HOUSTON CO., Ltd., and DAVIES, L. J. July 13, 1936, No. 19422. [Class 39 (i)] A high-pressure mercury-vapour discharge lamp is provided with a pair of elongated electrodes 2, 3 at least one of which is thermionic, in the form of a truncated-V, the arc being swept to and fro along their length by a magnetic field. An extended light source of high brilliancy is obtained. If the arc current is direct, the magnetic field should be alternating, and vice versa. Preferably the narrow end of the V is at the top, where the arc is naturally driven by convective forces. As shown in Fig. 3 the electrodes may be made of tungsten sheet 5 enclosing electron-emissive material 6, except for a narrow slit at the tip. The lamp may be externally heated to maintain the vapour pressure,
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB19422/36A GB478208A (en) | 1936-07-13 | 1936-07-13 | Improvements in and relating to electric discharge devices |
| US152816A US2177690A (en) | 1936-07-13 | 1937-07-09 | Electric discharge device |
| FR824238D FR824238A (en) | 1936-07-13 | 1937-07-12 | Improvements to discharge tubes |
| DEP75529D DE671795C (en) | 1936-07-13 | 1937-07-14 | Electric high-pressure discharge lamp with a constricted arc running between fixed electrodes, which is influenced by a magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB19422/36A GB478208A (en) | 1936-07-13 | 1936-07-13 | Improvements in and relating to electric discharge devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB478208A true GB478208A (en) | 1938-01-13 |
Family
ID=10129099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19422/36A Expired GB478208A (en) | 1936-07-13 | 1936-07-13 | Improvements in and relating to electric discharge devices |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2177690A (en) |
| DE (1) | DE671795C (en) |
| FR (1) | FR824238A (en) |
| GB (1) | GB478208A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2499506A (en) * | 1944-09-11 | 1950-03-07 | Gen Electric | Electric discharge device and electrode therefor |
| US2460738A (en) * | 1946-04-17 | 1949-02-01 | Gen Electric | Electrode construction |
| US2670451A (en) * | 1950-01-12 | 1954-02-23 | Westinghouse Electric Corp | Short arc high-pressure vapor discharge lamp |
| US4037266A (en) * | 1975-12-29 | 1977-07-19 | Bell Telephone Laboratories, Incorporated | Voltage surge protector |
| DE19610387A1 (en) * | 1996-03-16 | 1997-09-18 | Bosch Gmbh Robert | Gas discharge lamp, in particular for motor vehicle headlights |
-
1936
- 1936-07-13 GB GB19422/36A patent/GB478208A/en not_active Expired
-
1937
- 1937-07-09 US US152816A patent/US2177690A/en not_active Expired - Lifetime
- 1937-07-12 FR FR824238D patent/FR824238A/en not_active Expired
- 1937-07-14 DE DEP75529D patent/DE671795C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR824238A (en) | 1938-02-04 |
| DE671795C (en) | 1939-02-14 |
| US2177690A (en) | 1939-10-31 |
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