GB241216A - Improvements in and relating to electron discharge apparatus - Google Patents
Improvements in and relating to electron discharge apparatusInfo
- Publication number
- GB241216A GB241216A GB25248/25A GB2524825A GB241216A GB 241216 A GB241216 A GB 241216A GB 25248/25 A GB25248/25 A GB 25248/25A GB 2524825 A GB2524825 A GB 2524825A GB 241216 A GB241216 A GB 241216A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- anode
- roughened
- relating
- 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
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
- H01J2893/0012—Constructional arrangements
- H01J2893/0019—Chemical composition and manufacture
- H01J2893/0022—Manufacture
- H01J2893/0023—Manufacture carbonising and other surface treatments
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
241,216. British Thomson-Houston Co., Ltd., (Assignees of Mullaney, D. A.).. Oct. 9, 1924, ,date]. Vacuum tubes. - To increase the heat-radiating capacity of an electrode such as an anode or grid, it is roughened either by sand-blasting or the like, or by superficial oxidation followed by reduction. In the case of a grid, the treatment also diminishes the emission of secondary electrons. Fig. 1 shows a roughened anode 13 in close proximity to a filament-cathode 11, with a grid 12 interposed. In another valve the anode and grid consist of alternate slats arranged radially about a straight filament; in the drawing, each is shown with a right-angled extension at its outer edge.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US241216XA | 1924-10-09 | 1924-10-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB241216A true GB241216A (en) | 1926-03-11 |
Family
ID=21818971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25248/25A Expired GB241216A (en) | 1924-10-09 | 1925-10-09 | Improvements in and relating to electron discharge apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB241216A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE847629C (en) * | 1933-02-22 | 1952-08-25 | Baker & Co | Electron tubes with perforated sheet metal electrode and electrodes for it |
| US5216938A (en) * | 1990-03-28 | 1993-06-08 | Nissan | Control apparatus with fail-safe faculty |
-
1925
- 1925-10-09 GB GB25248/25A patent/GB241216A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE847629C (en) * | 1933-02-22 | 1952-08-25 | Baker & Co | Electron tubes with perforated sheet metal electrode and electrodes for it |
| US5216938A (en) * | 1990-03-28 | 1993-06-08 | Nissan | Control apparatus with fail-safe faculty |
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