GB581951A - Improvement in fluorescent lamps - Google Patents
Improvement in fluorescent lampsInfo
- Publication number
- GB581951A GB581951A GB8582/44A GB858244A GB581951A GB 581951 A GB581951 A GB 581951A GB 8582/44 A GB8582/44 A GB 8582/44A GB 858244 A GB858244 A GB 858244A GB 581951 A GB581951 A GB 581951A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- lead
- manganese
- chloride
- activated
- 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/67—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing refractory metals
- C09K11/68—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing refractory metals containing chromium, molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/66—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing germanium, tin or lead
- C09K11/666—Aluminates; Silicates
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Luminescent Compositions (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
581,951. Luminescent materials. SYLVANIA ELECTRIC PRODUCTS, Inc. May 5, 1944, No. 8582. Convention date, March 24, 1943. Drawings to Specification. [Class 39 (i)] A fluorescent material consists of calcium silicate activated by small amounts of manganese and lead. Calcium carbonate and silica are mixed together in such proportions to yield approximately calcium metasilicate and about 1 per cent of manganese chloride added, together with some lead chloride. Although the amount of lead in the finished material may be less than 1 per cent because of loss in firing, as much as 40 per cent lead chloride may be used in the mixture. The materials are milled together in distilled water, dried and fired from 2 to 10 hours at about 1100‹ to 1300‹ C. This material may be mixed with magnesium tungstate to give a white light, 5 - 10 per cent giving light comparable with that from an incandescent lamp, 40 per cent being needed for daylight lighting. The material is used as a coating on the inside of a fluorescent lamp with activated coiled coil tungsten electrodes and a filling of argon at low pressure and mercury vapour.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US581951XA | 1943-03-24 | 1943-03-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB581951A true GB581951A (en) | 1946-10-30 |
Family
ID=22015295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8582/44A Expired GB581951A (en) | 1943-03-24 | 1944-05-05 | Improvement in fluorescent lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB581951A (en) |
-
1944
- 1944-05-05 GB GB8582/44A patent/GB581951A/en not_active Expired
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