GB423039A - Method of producing high-emission thermionic cathodes - Google Patents
Method of producing high-emission thermionic cathodesInfo
- Publication number
- GB423039A GB423039A GB20779/33A GB2077933A GB423039A GB 423039 A GB423039 A GB 423039A GB 20779/33 A GB20779/33 A GB 20779/33A GB 2077933 A GB2077933 A GB 2077933A GB 423039 A GB423039 A GB 423039A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oxygen
- coated
- heated
- core
- july
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/22—Compensation of inertia forces
- F16F15/24—Compensation of inertia forces of crankshaft systems by particular disposition of cranks, pistons, or the like
-
- 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)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Solid Thermionic Cathode (AREA)
Abstract
423,039. Thermionic cathodes. RADIOAKT.-GES. D. S. LOEWE, 10, Wiesenweg, and WALDSCHNIDT, E., 49, Klingsorstrasse, both in Steglitz, Berlin. July 24, 1933, No. 20779. Convention date, July 25, 1932. [Class 39 (i)] An oxidizable metal core such as a tungsten wire is coated with an intermediate layer of one or more alkaline earth metal oxides and oxide of the core metal, and with a further layer of barium applied by atomization. A solution containing 90 per cent of barium carbonate and 10 per cent of strontium nitrate is applied to a tungsten wire and treated to 800‹ C., in oxygen ; or the layer may be heated in a vacuum and subsequently in oxygen. The exposed portions of the core are thus oxidized to form a coherent coating with the alkaline earth metal oxides. The steps may be repeated so as to obtain a thicker intermediate layer ; or a wire, coated with strontium nitrate and heated in oxygen, may be coated with barium carbonate and heated in oxygen.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE423039X | 1932-07-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB423039A true GB423039A (en) | 1935-01-24 |
Family
ID=6467723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20779/33A Expired GB423039A (en) | 1932-07-25 | 1933-07-24 | Method of producing high-emission thermionic cathodes |
Country Status (3)
| Country | Link |
|---|---|
| FR (2) | FR423039A (en) |
| GB (1) | GB423039A (en) |
| NL (1) | NL37860C (en) |
-
0
- NL NL37860D patent/NL37860C/xx active
-
1910
- 1910-11-25 FR FR423039D patent/FR423039A/en not_active Expired
-
1933
- 1933-07-24 FR FR758750D patent/FR758750A/en not_active Expired
- 1933-07-24 GB GB20779/33A patent/GB423039A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR423039A (en) | 1911-04-05 |
| NL37860C (en) | |
| FR758750A (en) | 1934-01-22 |
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