GB1082841A - Improvements in or relating to electric lamps having vitreous silica envelopes - Google Patents
Improvements in or relating to electric lamps having vitreous silica envelopesInfo
- Publication number
- GB1082841A GB1082841A GB3321164A GB3321164A GB1082841A GB 1082841 A GB1082841 A GB 1082841A GB 3321164 A GB3321164 A GB 3321164A GB 3321164 A GB3321164 A GB 3321164A GB 1082841 A GB1082841 A GB 1082841A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vitreous silica
- relating
- electric lamps
- lamps
- mandrel
- 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
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/28—Envelopes; Vessels
Landscapes
- Resistance Heating (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
1,082,841. Electric incandenscent lamps; discharge lamps. GENERAL ELECTRIC CO. Ltd. Oct. 6, 1965 [Aug. 14, 1964], No. 33211/64. Headings H1D and H1F. An incandescent lamp or a tubular discharge lamp has an envelope of vitreous silica, one or both surfaces of which is formed with irregularities to increase the diffusion of the light. They may be in the form of indentations or protuberances and may be random or regular, e.g. longitudinal ribs or grooves. These may be formed by drawing the tube while hot over or through a die or mandrel, or, where they are to be formed on both surfaces, between a die and a mandrel. Alternatively, they may be formed by applying suitable tools to the hot surface. A coating of diffusing material may in addition be applied to one or both surfaces or they may be blasted with alumina.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3321164A GB1082841A (en) | 1964-08-14 | 1964-08-14 | Improvements in or relating to electric lamps having vitreous silica envelopes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3321164A GB1082841A (en) | 1964-08-14 | 1964-08-14 | Improvements in or relating to electric lamps having vitreous silica envelopes |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1082841A true GB1082841A (en) | 1967-09-13 |
Family
ID=10349998
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3321164A Expired GB1082841A (en) | 1964-08-14 | 1964-08-14 | Improvements in or relating to electric lamps having vitreous silica envelopes |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1082841A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3652892A (en) * | 1968-11-04 | 1972-03-28 | Tokyo Shibaura Electric Co | Illuminating lamp having concave segments on exterior bulb surface |
DE2904864A1 (en) * | 1978-02-14 | 1979-08-16 | Philips Nv | LOW PRESSURE MERCURY VAPOR DISCHARGE LAMP |
-
1964
- 1964-08-14 GB GB3321164A patent/GB1082841A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3652892A (en) * | 1968-11-04 | 1972-03-28 | Tokyo Shibaura Electric Co | Illuminating lamp having concave segments on exterior bulb surface |
DE2904864A1 (en) * | 1978-02-14 | 1979-08-16 | Philips Nv | LOW PRESSURE MERCURY VAPOR DISCHARGE LAMP |
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