GB485787A - Improvements in and relating to electric discharge lamps - Google Patents
Improvements in and relating to electric discharge lampsInfo
- Publication number
- GB485787A GB485787A GB4780/37A GB478037A GB485787A GB 485787 A GB485787 A GB 485787A GB 4780/37 A GB4780/37 A GB 4780/37A GB 478037 A GB478037 A GB 478037A GB 485787 A GB485787 A GB 485787A
- Authority
- GB
- United Kingdom
- Prior art keywords
- envelope
- silver
- shield
- envelopes
- cadmium
- 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
- H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
- H01J61/18—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent
-
- 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
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
- H01J61/34—Double-wall vessels or containers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
- Resistance Heating (AREA)
Abstract
485,787. Metallic - vapour lamps. BRITISH THOMSON-HOU STON CO., Ltd., and MILNER, C. J. Feb. 17, 1937, No. 4780. [Class 39 (i)] A discharge lamp comprises an inner envelope A having electrodes E mounted therein and containing a volatile metal having its resonance radiation in the spectral region in which silver shows selective transmission (i.e. 3050-3300Š) and an outer envelope C surrounding the inner one, one or both of the envelopes or a glass heat shield B mounted between the envelopes having thereon, so as to intercept radiations proceeding from the discharge, a silver coating of sufficient thickness to absorb the major portion of the visible radiations. Suitable fillings are cadmium and zinc, resonating at 3260Š and 3076A respectively. In the postive column cadmium lamp shown, the U - tube A is supported from the envelope by a silvered mica disc M and from the shield B by a support S. The shield, coated with silver, is supported by spacing members S and a support W of the type shown in Specification 434,720. The starting gas is neon. A negative glow lamp may also be used. The almost pure ultra-violet radiation transmitted bythe silver film may be converted into visible light by fluorescent material placed, for example, on the inside of envelope C, or it may be used for medical or other purposes.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4780/37A GB485787A (en) | 1937-02-17 | 1937-02-17 | Improvements in and relating to electric discharge lamps |
| GB15118/37A GB496716A (en) | 1937-02-17 | 1937-05-31 | Improvements in and relating to the coating with metal of glass tubes or bulbs for use in electric lamps |
| FR833800D FR833800A (en) | 1937-02-17 | 1938-02-16 | Improvements to discharge tubes |
| FR49530D FR49530E (en) | 1937-02-17 | 1938-05-31 | Improvements to discharge tubes |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4780/37A GB485787A (en) | 1937-02-17 | 1937-02-17 | Improvements in and relating to electric discharge lamps |
| GB15118/37A GB496716A (en) | 1937-02-17 | 1937-05-31 | Improvements in and relating to the coating with metal of glass tubes or bulbs for use in electric lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB485787A true GB485787A (en) | 1938-05-25 |
Family
ID=10053346
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4780/37A Expired GB485787A (en) | 1937-02-17 | 1937-02-17 | Improvements in and relating to electric discharge lamps |
| GB15118/37A Expired GB496716A (en) | 1937-02-17 | 1937-05-31 | Improvements in and relating to the coating with metal of glass tubes or bulbs for use in electric lamps |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB15118/37A Expired GB496716A (en) | 1937-02-17 | 1937-05-31 | Improvements in and relating to the coating with metal of glass tubes or bulbs for use in electric lamps |
Country Status (2)
| Country | Link |
|---|---|
| FR (2) | FR833800A (en) |
| GB (2) | GB485787A (en) |
-
1937
- 1937-02-17 GB GB4780/37A patent/GB485787A/en not_active Expired
- 1937-05-31 GB GB15118/37A patent/GB496716A/en not_active Expired
-
1938
- 1938-02-16 FR FR833800D patent/FR833800A/en not_active Expired
- 1938-05-31 FR FR49530D patent/FR49530E/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR833800A (en) | 1938-10-31 |
| FR49530E (en) | 1939-05-01 |
| GB496716A (en) | 1938-11-30 |
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