GB613680A - Improvements in or relating to devices comprising a high-pressure metal-vapour discharge tube and a reflector - Google Patents
Improvements in or relating to devices comprising a high-pressure metal-vapour discharge tube and a reflectorInfo
- Publication number
- GB613680A GB613680A GB19076/46A GB1907646A GB613680A GB 613680 A GB613680 A GB 613680A GB 19076/46 A GB19076/46 A GB 19076/46A GB 1907646 A GB1907646 A GB 1907646A GB 613680 A GB613680 A GB 613680A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reflector
- electrodes
- discharge tube
- distance
- metal
- 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
- H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/025—Associated optical elements
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
- Lasers (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
- Discharge Lamp (AREA)
Abstract
613,680. Vapour lamps. PHILIPS LAMPS, Ltd. June 26, 1946, No. 19076. Convention date, Oct. 30, 1939. Drawings to Specification. [Class 75 (iv)] [Also in Group XL (a)] In a water-cooled high pressure metal vapour discharge tube having solid incandescent electrodes protruding from a quantity of vapourizable metal, fitted with a semi-cylindrical co-axial reflector by which light is reflected on the discharge space, the length of the reflector is less than the distance between the electrodes. Preferably the ratio of half the difference between the distance separating the electrodes and the length of the reflector to the distance between the reflector and the inside of the tube wall is at least 1 : 2. By these means the reflected light striking the metal surrounding the electrodes is reduced and variations in the operating voltage are avoided.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL613680X | 1939-10-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB613680A true GB613680A (en) | 1948-12-01 |
Family
ID=19788182
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB10131/41A Expired GB546810A (en) | 1939-10-30 | 1941-08-08 | Improvements in or relating to devices comprising a high-pressure metal-vapour discharge tube and a reflector |
GB19076/46A Expired GB613680A (en) | 1939-10-30 | 1946-06-26 | Improvements in or relating to devices comprising a high-pressure metal-vapour discharge tube and a reflector |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB10131/41A Expired GB546810A (en) | 1939-10-30 | 1941-08-08 | Improvements in or relating to devices comprising a high-pressure metal-vapour discharge tube and a reflector |
Country Status (4)
Country | Link |
---|---|
US (1) | US2265362A (en) |
FR (1) | FR873568A (en) |
GB (2) | GB546810A (en) |
NL (1) | NL53999C (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2525013A (en) * | 1945-12-07 | 1950-10-10 | Gen Electric | Lighting apparatus |
NL218722A (en) * | 1956-07-05 | |||
US5170091A (en) * | 1990-12-10 | 1992-12-08 | Ultraviolet Energy Generators, Inc. | Linear ultraviolet flash lamp with self-replenishing cathode |
-
0
- NL NL53999D patent/NL53999C/xx active
-
1941
- 1941-02-26 US US380716A patent/US2265362A/en not_active Expired - Lifetime
- 1941-07-03 FR FR873568D patent/FR873568A/en not_active Expired
- 1941-08-08 GB GB10131/41A patent/GB546810A/en not_active Expired
-
1946
- 1946-06-26 GB GB19076/46A patent/GB613680A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2265362A (en) | 1941-12-09 |
NL53999C (en) | |
FR873568A (en) | 1942-07-13 |
GB546810A (en) | 1942-07-30 |
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