GB534556A - Improvements in enamels particularly those applicable to electric lamp bulbs - Google Patents
Improvements in enamels particularly those applicable to electric lamp bulbsInfo
- Publication number
- GB534556A GB534556A GB4490/40A GB449040A GB534556A GB 534556 A GB534556 A GB 534556A GB 4490/40 A GB4490/40 A GB 4490/40A GB 449040 A GB449040 A GB 449040A GB 534556 A GB534556 A GB 534556A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- enamels
- particularly those
- electric lamp
- lamp bulbs
- 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
- H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
- H01J5/02—Vessels; Containers; Shields associated therewith; Vacuum locks
- H01J5/08—Vessels; Containers; Shields associated therewith; Vacuum locks provided with coatings on the walls thereof; Selection of materials for the coatings
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/02—Surface treatment of glass, not in the form of fibres or filaments, by coating with glass
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
Abstract
534,556. Enamels and glazes. BRITISH THOMSON-HOUSTON CO., Ltd. March 11, 1940, No. 4490. Convention date, March 11, 1939. [Class 56] A leadless enamel, particularly intended for application to the glass bulbs or envelopes of electric lamps, comprises about 8-32 per cent. of ScO 2 , 10-45 per cent. of B 2 O 3 , 1-6 per cent. of Al 2 O 3 , 0-6 per cent. of Z+O, less than 10 per cent. of alkali oxides, 4-12 per cent. of antimony oxide or arsenic oxide, and at least two oxides selected from the group consisting of BaO, CaO, CdO, and ZnO. Zirconium oxide may be added to increase the chemical stability of the enamel. Compositions of a number of enamels are given in the Specification and Specifications 273,260, [Class 56] and 428,414, [Group XI], are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US534556XA | 1939-03-11 | 1939-03-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB534556A true GB534556A (en) | 1941-03-10 |
Family
ID=21984360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4490/40A Expired GB534556A (en) | 1939-03-11 | 1940-03-11 | Improvements in enamels particularly those applicable to electric lamp bulbs |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR863960A (en) |
| GB (1) | GB534556A (en) |
-
1940
- 1940-03-11 GB GB4490/40A patent/GB534556A/en not_active Expired
- 1940-03-11 FR FR863960D patent/FR863960A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR863960A (en) | 1941-04-15 |
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