GB978217A - Improvements in directly-heated cathodes for electric discharge tubes - Google Patents
Improvements in directly-heated cathodes for electric discharge tubesInfo
- Publication number
- GB978217A GB978217A GB36505/61A GB3650561A GB978217A GB 978217 A GB978217 A GB 978217A GB 36505/61 A GB36505/61 A GB 36505/61A GB 3650561 A GB3650561 A GB 3650561A GB 978217 A GB978217 A GB 978217A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plate
- end members
- wire
- wires
- electric discharge
- 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
- H01J1/15—Cathodes heated directly by an electric current
- H01J1/18—Supports; Vibration-damping arrangements
-
- 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
- H01J1/15—Cathodes heated directly by an electric current
- H01J1/16—Cathodes heated directly by an electric current characterised by the shape
Landscapes
- Solid Thermionic Cathode (AREA)
- Electron Sources, Ion Sources (AREA)
- Discharge Lamp (AREA)
Abstract
978,217. Thermionic cathodes. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Oct. 11, 1961 [Oct. 14, 1960], No. 36505/61. Heading H1D. A directly-heated cathode unit, for an electric discharge tube, comprises a plurality of thin wires 1, Figs. 1 and 2, connected in parallel and wound on two metal end members 2, 3 of U-shaped cross-section insulated from one another and arranged on two opposite parallel edges of a supporting plate 4, at least one of the end members being slidable on the plate. As shown, both end members 2, 3 fit slidably over opposite ends of ceramic plate 4 and are welded to support wires 5, 6, wire 5 being mounted on a support rod in the discharge tube while wire 6 is provided with a brace 7 engaged by a spring-loaded cross-bar 15 for tensioning wires 1. Wire 1 may be of thoriated tungsten or of tungsten or molybdenum coated with a barium-strontium emissive paste, the emissive coating being removed where the wire contacts end members 2, 3. Ceramic plate 4 may be replaced either by a mica plate 11, Fig. 3, supported by slidable metal tubes 9, 10 of rectangular cross-section welded to end members 2, 3, or by a molybdenum plate having insulating coatings over its ends, Fig. 5 (not shown). In the latter case the plate may be coated with zirconium powder and operated as an ion trap. Suitable dimensions are given.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL256883 | 1960-10-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB978217A true GB978217A (en) | 1964-12-16 |
Family
ID=19752630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB36505/61A Expired GB978217A (en) | 1960-10-14 | 1961-10-11 | Improvements in directly-heated cathodes for electric discharge tubes |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3177393A (en) |
| CH (1) | CH404812A (en) |
| DE (1) | DE1165758B (en) |
| ES (1) | ES271131A1 (en) |
| GB (1) | GB978217A (en) |
| NL (1) | NL113253C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1251886B (en) * | 1964-10-28 | |||
| US3419743A (en) * | 1965-12-15 | 1968-12-31 | Rca Corp | Electron tube having a tensioned cathode |
| JPS6053418B2 (en) * | 1976-08-09 | 1985-11-26 | 株式会社日立製作所 | Electron tube cathode structure |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1273630A (en) * | 1918-02-20 | 1918-07-23 | Gen Electric | Electron-discharge apparatus. |
| DE519082C (en) * | 1926-04-21 | 1931-02-23 | Radiotechnique Soc | Process for the production of electron tubes |
-
0
- NL NL113253D patent/NL113253C/xx active
-
1961
- 1961-08-21 US US132835A patent/US3177393A/en not_active Expired - Lifetime
- 1961-10-10 DE DEN20656A patent/DE1165758B/en active Pending
- 1961-10-11 ES ES0271131A patent/ES271131A1/en not_active Expired
- 1961-10-11 CH CH1176561A patent/CH404812A/en unknown
- 1961-10-11 GB GB36505/61A patent/GB978217A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ES271131A1 (en) | 1962-01-01 |
| CH404812A (en) | 1965-12-31 |
| DE1165758B (en) | 1964-03-19 |
| US3177393A (en) | 1965-04-06 |
| NL113253C (en) |
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