GB790900A - Improvements relating to cathode assemblies and a method of making them - Google Patents
Improvements relating to cathode assemblies and a method of making themInfo
- Publication number
- GB790900A GB790900A GB36650/55A GB3665055A GB790900A GB 790900 A GB790900 A GB 790900A GB 36650/55 A GB36650/55 A GB 36650/55A GB 3665055 A GB3665055 A GB 3665055A GB 790900 A GB790900 A GB 790900A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cup
- closure
- tungsten powder
- dec
- making
- 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
-
- 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
- H01J1/28—Dispenser-type cathodes, e.g. L-cathode
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Powder Metallurgy (AREA)
Abstract
790,900. Making cathodes. EGYESULT IZZOLAMPA ES VILLAMOSSAGI R. T. Dec. 21, 1955 [Dec. 24, 1954], No. 36650/55. Class 83 (2). [Also in Group XL (a)] An L-cathode comprises a cylindrical cup 6 fitting tightly within another cup 4, the space between their end-walls forming the reservoir chamber for the emissive material 5; an opening in the end wall of cup 4 is filled by the porous closure 3, which overlaps the edge 14 of the opening on both sides 9, 10, as shown, or on one side only (Fig. 2, not shown). The form of Fig. 2 (not shown) is made by placing the outer cup 4 apertured end downwards in a press mould, adding sufficient tungsten powder to form the closure 3, and then pressing and sintering. To make the form of Fig. 1, a quantity of tungsten powder is placed in the mould first, then the cup inserted, and a further quantity of tungsten powder added, so that the sintered closure will overlap both sides of the flange 14. Specification 790,899, [Group XL (a)], is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
HU344788X | 1954-12-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB790900A true GB790900A (en) | 1958-02-19 |
Family
ID=10978860
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB36650/55A Expired GB790900A (en) | 1954-12-24 | 1955-12-21 | Improvements relating to cathode assemblies and a method of making them |
Country Status (4)
Country | Link |
---|---|
CH (1) | CH344788A (en) |
DE (1) | DE1046202B (en) |
GB (1) | GB790900A (en) |
NL (1) | NL99045C (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3336489A1 (en) * | 1983-10-07 | 1985-04-25 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Indirectly heated dispenser cathode |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT178147B (en) * | 1947-11-26 | 1954-04-10 | Philips Nv | Cathode for electric discharge tubes with an operating temperature exceeding 1000 ° C |
-
0
- NL NL99045D patent/NL99045C/xx active
-
1955
- 1955-12-14 DE DEE11681A patent/DE1046202B/en active Pending
- 1955-12-21 GB GB36650/55A patent/GB790900A/en not_active Expired
- 1955-12-23 CH CH344788D patent/CH344788A/en unknown
Also Published As
Publication number | Publication date |
---|---|
NL99045C (en) | |
DE1046202B (en) | 1958-12-11 |
CH344788A (en) | 1960-02-29 |
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