GB215348A - A malleable and ductile tungsten composition or alloy suitable for use in the manufacture of lighting bodies or filaments - Google Patents
A malleable and ductile tungsten composition or alloy suitable for use in the manufacture of lighting bodies or filamentsInfo
- Publication number
- GB215348A GB215348A GB10311/24A GB1031124A GB215348A GB 215348 A GB215348 A GB 215348A GB 10311/24 A GB10311/24 A GB 10311/24A GB 1031124 A GB1031124 A GB 1031124A GB 215348 A GB215348 A GB 215348A
- Authority
- GB
- United Kingdom
- Prior art keywords
- thorium
- filaments
- per cent
- malleable
- manufacture
- 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
- H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
- H01K3/02—Manufacture of incandescent bodies
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Powder Metallurgy (AREA)
- Ceramic Products (AREA)
- Discharge Lamp (AREA)
Abstract
215,348. British Thomson-Houston Co., Ltd., (Assignees of Fonda, G. R.). May 1, 1923, [Convention date]. Alloys. - Tungsten filaments contain thorium and boron as elementary constituents. These materials may be added in the elementary state, or as reducible or decomposable compounds. For instance to finely-divided tungsten may be added 0.5 per cent metallic thorium or 0.7 per cent thorium oxide and 0.5 to 0.3 per cent boron nitride. When filaments made from these mixtures are treated at high temperatures the boron nitride decomposes, and when thorium oxide is present this is reduced by the boron to metallic thorium. Specifications 7655/06, 18053/07 and 10918/13, [Class 39 (ii), Electric lamps, Incandescent], are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US635970A US1623784A (en) | 1923-05-01 | 1923-05-01 | Incandescent filament |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB215348A true GB215348A (en) | 1924-10-16 |
Family
ID=24549851
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB10187/24A Expired GB215347A (en) | 1923-05-01 | 1924-04-24 | Improvements in and relating to the manufacture of sintered tungsten and filaments made therefrom |
| GB10311/24A Expired GB215348A (en) | 1923-05-01 | 1924-04-25 | A malleable and ductile tungsten composition or alloy suitable for use in the manufacture of lighting bodies or filaments |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB10187/24A Expired GB215347A (en) | 1923-05-01 | 1924-04-24 | Improvements in and relating to the manufacture of sintered tungsten and filaments made therefrom |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1623784A (en) |
| GB (2) | GB215347A (en) |
| NL (1) | NL16272C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU590106B2 (en) * | 1986-08-05 | 1989-10-26 | Shell Internationale Research Maatschappij B.V. | Process for partial oxidation of a hydrocarbon-containing fuel |
-
0
- NL NL16272D patent/NL16272C/xx active
-
1923
- 1923-05-01 US US635970A patent/US1623784A/en not_active Expired - Lifetime
-
1924
- 1924-04-24 GB GB10187/24A patent/GB215347A/en not_active Expired
- 1924-04-25 GB GB10311/24A patent/GB215348A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU590106B2 (en) * | 1986-08-05 | 1989-10-26 | Shell Internationale Research Maatschappij B.V. | Process for partial oxidation of a hydrocarbon-containing fuel |
Also Published As
| Publication number | Publication date |
|---|---|
| US1623784A (en) | 1927-04-05 |
| NL16272C (en) | |
| GB215347A (en) | 1925-09-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US1363162A (en) | Filament for incandescent electric lamps | |
| GB816135A (en) | Workable alloys of molybdenum and tungsten containing rhenium | |
| GB215348A (en) | A malleable and ductile tungsten composition or alloy suitable for use in the manufacture of lighting bodies or filaments | |
| US1566848A (en) | Incandescent lamp | |
| US1665636A (en) | Activation of electron-emission material | |
| GB174326A (en) | Improvements in and relating to incandescent lamps | |
| US2202108A (en) | Refractory metal composition | |
| GB525478A (en) | Improved manufacture of malleable iron | |
| US1721383A (en) | Metal composition | |
| GB313010A (en) | Improvements in and relating to incandescent electric lamps | |
| GB353459A (en) | Improvements in or relating to iron, chromium and nickel alloys | |
| US1044156A (en) | Cement for metallic filaments. | |
| GB534832A (en) | Improvements in or relating to electrical contact members | |
| GB168669A (en) | Improvements in and relating to filaments and like bodies | |
| GB245437A (en) | Improvements in and relating to metal compositions and methods of manufacturing the same | |
| SU56244A1 (en) | Composition for iron aluminization | |
| GB718804A (en) | Improvements in and relating to electroluminescent phosphors | |
| GB532447A (en) | Improvements in or relating to electrical contact members | |
| GB211849A (en) | Improvements relating to the manufacture of filamentary incandescing bodies | |
| GB786994A (en) | Electric incandescent lamp | |
| GB239235A (en) | Improvements in methods of preparing bodies of zirconium alloys | |
| GB280236A (en) | Improvements in or relating to incandescent cathodes | |
| GB550799A (en) | Improvements in or relating to the production of phosphorescent materials | |
| GB221786A (en) | Improved alloys for tipping metallic surfaces | |
| GB160373A (en) | Improvements in and relating to tungsten alloy |