GB430544A - Improvements in or relating to cathode structures suitable for use in thermionic valves - Google Patents
Improvements in or relating to cathode structures suitable for use in thermionic valvesInfo
- Publication number
- GB430544A GB430544A GB16176/34A GB1617634A GB430544A GB 430544 A GB430544 A GB 430544A GB 16176/34 A GB16176/34 A GB 16176/34A GB 1617634 A GB1617634 A GB 1617634A GB 430544 A GB430544 A GB 430544A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- rod
- coating
- relating
- heater
- 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
- 238000000576 coating method Methods 0.000 abstract 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 2
- 239000011248 coating agent Substances 0.000 abstract 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract 2
- 229910052721 tungsten Inorganic materials 0.000 abstract 2
- 239000010937 tungsten Substances 0.000 abstract 2
- 235000017858 Laurus nobilis Nutrition 0.000 abstract 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 abstract 1
- 244000125380 Terminalia tomentosa Species 0.000 abstract 1
- 235000005212 Terminalia tomentosa Nutrition 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
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
- Solid Thermionic Cathode (AREA)
- Microwave Tubes (AREA)
Abstract
430,544. Thermionic cathodes. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, London.-(Assignees of Shrader, T. M. ; 40, Laurel Drive, West Summit, New Jersey, U.S.A.) May 30, 1934, No. 16176. Convention date, July 7, 1933. [Class 39 (i)] The heater of an indirectly heated cathode is formed by coating a tungsten or molybdenum rod 1 with aluminium oxide, placing a double, helical tungsten coil 3 thereon and coating this coil; the rod is about 20 mils. in diameter, the insulating coatings being not more than 15 mils thick. The coatings are sprayed on the rod and coil and are then fired or baked. The complete heater is inserted in an oxide coated nickel sleeve 5.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US430544XA | 1933-07-07 | 1933-07-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB430544A true GB430544A (en) | 1935-06-20 |
Family
ID=21925212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB16176/34A Expired GB430544A (en) | 1933-07-07 | 1934-05-30 | Improvements in or relating to cathode structures suitable for use in thermionic valves |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB430544A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE746497C (en) * | 1939-03-19 | 1944-12-23 | Indirectly heated cathode for electrical discharge vessels with parts of different cross-sections of the cathode sleeve | |
| DE904570C (en) * | 1940-10-30 | 1954-02-18 | Henry Kershaw | Process for the production of a jacket-shaped cathode for electron tubes |
| DE1101628B (en) * | 1956-08-22 | 1961-03-09 | Egyesuelt Izzolampa | Cathode system for diodes used in televisions |
-
1934
- 1934-05-30 GB GB16176/34A patent/GB430544A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE746497C (en) * | 1939-03-19 | 1944-12-23 | Indirectly heated cathode for electrical discharge vessels with parts of different cross-sections of the cathode sleeve | |
| DE904570C (en) * | 1940-10-30 | 1954-02-18 | Henry Kershaw | Process for the production of a jacket-shaped cathode for electron tubes |
| DE1101628B (en) * | 1956-08-22 | 1961-03-09 | Egyesuelt Izzolampa | Cathode system for diodes used in televisions |
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