GB469731A - Improvements in or relating to combinations of electric discharge devices with materials excited to luminescence by the electric discharge - Google Patents
Improvements in or relating to combinations of electric discharge devices with materials excited to luminescence by the electric dischargeInfo
- Publication number
- GB469731A GB469731A GB2535/36A GB253536A GB469731A GB 469731 A GB469731 A GB 469731A GB 2535/36 A GB2535/36 A GB 2535/36A GB 253536 A GB253536 A GB 253536A GB 469731 A GB469731 A GB 469731A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phosphate
- electric discharge
- cadmium
- luminescent
- luminescence
- 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
- C09K11/70—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing phosphorus
-
- 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)
Abstract
469,731. Electric discharge lamps provided with luminescent screens. GENERAL ELECTRIC CO., Ltd., and RANDALL, J. T. Jan. 27, 1936, No. 2535. [Class 98 (i)] [Also in Group XL] A lamp filled with gas or vapour (e.g. a mixture of argon and mercury vapour) is combined with a luminescent medium consisting of a cadmium phosphate activated as with manganese so that it emits reddish luminescence, the lamp being caused to emit nearly white light by adjusting the proportion of the primary radiation of the mercury spectrum to the red radiation from the cadmium phosphate to maximum efficiency for example as described in Specification 460,890, [Group XL]. The screen may be exposed directly to the discharge or be separated from it by a solid transparent to short-wave radiation. The luminescent material is preferably prepared by precipitating the phosphate by reaction of ammonium phosphate with cadmium sulphate, adding 0À1 per cent of manganese in the form of chloride, drying and grinding the powder, and heating in the usual manner. In an alternative method, the phosphate is derived from a mixture of cadmium oxide and phosphoric acid. The material, after grinding and sieving if desired, may be attached to the support by phosphoric acid as binder, as described in Specification 460,756.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2535/36A GB469731A (en) | 1936-01-27 | 1936-01-27 | Improvements in or relating to combinations of electric discharge devices with materials excited to luminescence by the electric discharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2535/36A GB469731A (en) | 1936-01-27 | 1936-01-27 | Improvements in or relating to combinations of electric discharge devices with materials excited to luminescence by the electric discharge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB469731A true GB469731A (en) | 1937-07-27 |
Family
ID=9741270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2535/36A Expired GB469731A (en) | 1936-01-27 | 1936-01-27 | Improvements in or relating to combinations of electric discharge devices with materials excited to luminescence by the electric discharge |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB469731A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2463449A (en) * | 1946-05-04 | 1949-03-01 | Rca Corp | Cadmium pyrophosphate phosphor |
| US2636010A (en) * | 1951-04-05 | 1953-04-21 | Gen Electric | Luminescent materials and preparation thereof |
| US2697077A (en) * | 1950-12-26 | 1954-12-14 | Rca Corp | Method of making a zinc phosphate phosphor |
-
1936
- 1936-01-27 GB GB2535/36A patent/GB469731A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2463449A (en) * | 1946-05-04 | 1949-03-01 | Rca Corp | Cadmium pyrophosphate phosphor |
| US2697077A (en) * | 1950-12-26 | 1954-12-14 | Rca Corp | Method of making a zinc phosphate phosphor |
| US2636010A (en) * | 1951-04-05 | 1953-04-21 | Gen Electric | Luminescent materials and preparation thereof |
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