GB258642A - Improvements in and relating to tungsten wire - Google Patents
Improvements in and relating to tungsten wireInfo
- Publication number
- GB258642A GB258642A GB1600525A GB1600525A GB258642A GB 258642 A GB258642 A GB 258642A GB 1600525 A GB1600525 A GB 1600525A GB 1600525 A GB1600525 A GB 1600525A GB 258642 A GB258642 A GB 258642A
- Authority
- GB
- United Kingdom
- Prior art keywords
- silicate
- beryllium
- oxide
- filaments
- relating
- 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)
- Discharge Lamp (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
258,642. Edison Swan Electric Co., Ltd., and Percival, G. A. June 20, 1925. Vacuum tubes.-To minimize change of crystal structure in filaments for lamps and thermionic valves, a quantity of beryllium silicate, not exceeding 0.9 per cent, is incorporated in the tung sten oxide previous to its reduction. A colloidal solution may be prepared of a silicate and of beryllium oxide in such proportions that on fusion beryllium silicate is produced, the colloidal mixture being mixed with the tungsten oxide. Electron emitting materials such as strontium, calcium, and thorium may also be introduced into the filaments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1600525A GB258642A (en) | 1925-06-20 | 1925-06-20 | Improvements in and relating to tungsten wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1600525A GB258642A (en) | 1925-06-20 | 1925-06-20 | Improvements in and relating to tungsten wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB258642A true GB258642A (en) | 1926-09-20 |
Family
ID=10069473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1600525A Expired GB258642A (en) | 1925-06-20 | 1925-06-20 | Improvements in and relating to tungsten wire |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB258642A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2873186A (en) * | 1948-06-09 | 1959-02-10 | Frank G Foote | Thorium-silicon-beryllium alloys |
| US3838486A (en) * | 1972-03-16 | 1974-10-01 | Egyesuelt Izzolampa | Method for the preparation of tungsten incandescent body containing foreign substances |
| US3853492A (en) * | 1972-03-16 | 1974-12-10 | T Millner | Tungsten incandescent body containing foreign substances and procedure for its preparation |
-
1925
- 1925-06-20 GB GB1600525A patent/GB258642A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2873186A (en) * | 1948-06-09 | 1959-02-10 | Frank G Foote | Thorium-silicon-beryllium alloys |
| US3838486A (en) * | 1972-03-16 | 1974-10-01 | Egyesuelt Izzolampa | Method for the preparation of tungsten incandescent body containing foreign substances |
| US3853492A (en) * | 1972-03-16 | 1974-12-10 | T Millner | Tungsten incandescent body containing foreign substances and procedure for its preparation |
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