GB306960A - Improvements relating to cathodes for thermionic valves - Google Patents
Improvements relating to cathodes for thermionic valvesInfo
- Publication number
- GB306960A GB306960A GB6366/29A GB636629A GB306960A GB 306960 A GB306960 A GB 306960A GB 6366/29 A GB6366/29 A GB 6366/29A GB 636629 A GB636629 A GB 636629A GB 306960 A GB306960 A GB 306960A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- silicon
- tablet
- deposited
- valve
- 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
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes
- H01J9/042—Manufacture, activation of the emissive part
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Cold Cathode And The Manufacture (AREA)
- Particle Accelerators (AREA)
Abstract
306,960. Loewe, B. Feb. 28, 1928, [Convention date]. Vacuum tubes.-In the manufacture of thermionic valves, barium, calcium or strontium is liberated to activate the cathode by effecting within the valve a chemical reaction which causes the metal to be vaporized and deposited on the cathode. In an example, powdered silicon and barium oxide, formed into a tablet, with the addition, if necessary, of an agglutinant, are so introduced into the valve that heat may be applied thereto while connected to the pump. The reactive materials may be mixed with a retarding agent, which may be one of the reaction products. Silicon may be replaced by ferro-silicon. A tablet of the materials is secured inside the anode, or in a. capsule which is mounted at the side of the electrode system, and heated by electron bombardment or by high-frequency currents. The Specification as open to inspection under Sect. 91 (3) (a) states also that sodium, potassium and other metals may be deposited by the method described and that deposits of different metals may be produced successively or simultaneously. Aluminium or magnesium may be employed as the reducing agent and the mixture to be decomposed may be applied to the surface of the cathode. This subject-matter does not appear in the Specification as accepted. Reference has been directed by the Comptroller to Specification 296,781.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE306960X | 1928-02-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB306960A true GB306960A (en) | 1930-07-28 |
Family
ID=6121282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6366/29A Expired GB306960A (en) | 1928-02-28 | 1929-02-27 | Improvements relating to cathodes for thermionic valves |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US1917044A (en) |
| BE (1) | BE358445A (en) |
| FR (1) | FR670304A (en) |
| GB (1) | GB306960A (en) |
| NL (1) | NL30970C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2426247A (en) * | 1943-03-24 | 1947-08-26 | United Electronies Company | Getter apparatus |
| US2933633A (en) * | 1955-02-16 | 1960-04-19 | Gen Electric | Electric discharge device |
| US2927069A (en) * | 1956-12-07 | 1960-03-01 | Columbia Broadcasting Syst Inc | Method of insulating electron discharge tube elements |
-
0
- NL NL30970D patent/NL30970C/xx active
- BE BE358445D patent/BE358445A/xx unknown
-
1929
- 1929-02-26 US US342930A patent/US1917044A/en not_active Expired - Lifetime
- 1929-02-26 FR FR670304D patent/FR670304A/en not_active Expired
- 1929-02-27 GB GB6366/29A patent/GB306960A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR670304A (en) | 1929-11-27 |
| NL30970C (en) | |
| US1917044A (en) | 1933-07-04 |
| BE358445A (en) |
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