GB475006A - Electric incandescent lamp, and a luminous body especially adapted for use in such lamp - Google Patents
Electric incandescent lamp, and a luminous body especially adapted for use in such lampInfo
- Publication number
- GB475006A GB475006A GB31278/36A GB3127836A GB475006A GB 475006 A GB475006 A GB 475006A GB 31278/36 A GB31278/36 A GB 31278/36A GB 3127836 A GB3127836 A GB 3127836A GB 475006 A GB475006 A GB 475006A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ratio
- spiral
- limits
- cores
- filament
- 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
- H01K1/50—Selection of substances for gas fillings; Specified pressure thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/02—Incandescent bodies
- H01K1/14—Incandescent bodies characterised by the shape
Landscapes
- Resistance Heating (AREA)
Abstract
475,006. Destructible cores. LONN, E. I. Nov. 16, 1936, No. 31278. Convention date, Nov. 16, 1935. [Class 83 (iv)] [Also in Group XI] A triple spiral body or filament, especially for electric incandescent lamps for common illuminating purposes is wound upon successive mandrels of diameters so proportioned that the ratio of the diameter d of the filament to the core diameter D<1> of the primary spiral is within the limits 1:0À9-1À8, and the ratio of d to the pitch P<1> of the primary spiral is within the limits 1 : 1À6-2À2; the ratio of d to the core diameter D<2> of the secondary spiral is within the limits 1 : 3 -5À2, and its ratio to the pitch D<2> of the secondary spiral is within the limits 1: 5À4-7À8; while the ratio of d to the core diameter D<3> of the tertiary spiral is within the limits 1 : 8À5-19, and its ratio to the pitch P<3> of the tertiary spiral is within the limits 1 : 15-32. In an example, the ratio d : D<1> : D<2> : D<3> is 1 : 1À4 : 3À7 : 11, with corresponding pitch ratios d : P<1> : P<2> : P<3> having the value 1 : 1À8 : 6À5 : 26. All the spirals are preferably formed with the cores still retained in position, the choice of core material depending on the heat treatment required. Cores of refractory metal such as molybdenum are used when, together with the filament, they are heated to a temperature exceeding 1600‹ C., whereas the primary and secondary cores may be of steel, nickel or the like, and the tertiary core of refractory metal when a heat treatment at a lower temperature is given to eliminate mechanical stress, the first two cores being removed by acid before the final heating at high temperature and subsequent removal of the refractory core by drawing it from the completed filament. The spirals may be wound in different or similar directions ; in the example they are all in the same direction. Reference has been directed by the Comptroller to Specification 456,760, [Group XI].
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR797768T | 1935-11-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB475006A true GB475006A (en) | 1937-11-11 |
Family
ID=9235854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB31278/36A Expired GB475006A (en) | 1935-11-16 | 1936-11-16 | Electric incandescent lamp, and a luminous body especially adapted for use in such lamp |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR797768A (en) |
| GB (1) | GB475006A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6803706B2 (en) | 2001-03-06 | 2004-10-12 | Koninklijke Philips Electronics N.V. | Lamp with double layer coiled-coil filament |
| WO2008012277A2 (en) * | 2006-07-28 | 2008-01-31 | Osram Gesellschaft mit beschränkter Haftung | Luminous body for an incandescent lamp and method for its production |
| WO2011020285A1 (en) * | 2009-08-21 | 2011-02-24 | Yang Fanwen | Multi-helix filament |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4316116A (en) * | 1979-12-19 | 1982-02-16 | General Electric Company | Triple-coil incandescent filament |
-
1935
- 1935-11-16 FR FR797768D patent/FR797768A/en not_active Expired
-
1936
- 1936-11-16 GB GB31278/36A patent/GB475006A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6803706B2 (en) | 2001-03-06 | 2004-10-12 | Koninklijke Philips Electronics N.V. | Lamp with double layer coiled-coil filament |
| WO2008012277A2 (en) * | 2006-07-28 | 2008-01-31 | Osram Gesellschaft mit beschränkter Haftung | Luminous body for an incandescent lamp and method for its production |
| WO2008012277A3 (en) * | 2006-07-28 | 2008-12-11 | Osram Gmbh | Luminous body for an incandescent lamp and method for its production |
| WO2011020285A1 (en) * | 2009-08-21 | 2011-02-24 | Yang Fanwen | Multi-helix filament |
| CN101630628B (en) * | 2009-08-21 | 2011-09-07 | 杨范文 | Multispiral filament |
Also Published As
| Publication number | Publication date |
|---|---|
| FR797768A (en) | 1936-05-04 |
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