GB249939A - Equipotential cathode tube - Google Patents
Equipotential cathode tubeInfo
- Publication number
- GB249939A GB249939A GB38725A GB38725A GB249939A GB 249939 A GB249939 A GB 249939A GB 38725 A GB38725 A GB 38725A GB 38725 A GB38725 A GB 38725A GB 249939 A GB249939 A GB 249939A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- cathode
- wall
- placed outside
- cathode tube
- 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
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
Landscapes
- Discharge Lamp (AREA)
Abstract
249,939. Western Electric Co., Ltd., (Western Electric Co., Inc.). Jan. 6, 1925. Thermionic valves. - An equipotential-cathode tube has the cathode made thermionically active by an electric heating device placed outside the tube. In the construction shown, the wall 1 of the tube is of conductive material and forms the cathode. A grid 2 and an anode 3 are arranged within the tube and are supported by a glass stem 4 which is sealed on to the wall 1. The inner face of that part of the wall which constitutes the cathode is coated or otherwise lined with electron emitting material, such as alkaline earth oxides, and this material is rendered active by a heating-device 6 placed outside the coated part of the tube and connected to a source of current 7. In a modification, the walls of the tube are of glass, and the cathode may be of sodium or other alkali metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB38725A GB249939A (en) | 1925-01-06 | 1925-01-06 | Equipotential cathode tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB38725A GB249939A (en) | 1925-01-06 | 1925-01-06 | Equipotential cathode tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB249939A true GB249939A (en) | 1926-04-06 |
Family
ID=9703507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB38725A Expired GB249939A (en) | 1925-01-06 | 1925-01-06 | Equipotential cathode tube |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB249939A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2445754A (en) * | 1943-06-19 | 1948-07-27 | Melvin D Baller | Vacuum tube |
-
1925
- 1925-01-06 GB GB38725A patent/GB249939A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2445754A (en) * | 1943-06-19 | 1948-07-27 | Melvin D Baller | Vacuum tube |
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