GB736542A - Improvements relating to thermionic cathodes - Google Patents
Improvements relating to thermionic cathodesInfo
- Publication number
- GB736542A GB736542A GB8427/53A GB842753A GB736542A GB 736542 A GB736542 A GB 736542A GB 8427/53 A GB8427/53 A GB 8427/53A GB 842753 A GB842753 A GB 842753A GB 736542 A GB736542 A GB 736542A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filament
- support
- helix
- wires
- march
- 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
- H01J1/16—Cathodes heated directly by an electric current characterised by the shape
Landscapes
- Electron Sources, Ion Sources (AREA)
- Solid Thermionic Cathode (AREA)
Abstract
736,542. Thermionic-cathode constructions. EDISON SWAN ELECTRIC CO., Ltd. March 26, 1953 [March 28, 1952], No. 8427/53. Class 39 (1). A therinionic cathode comprises two or more electron-emissive filaments helically wound and spaced apart, together with one or more support wires wound helically in the opposite sense and of appreci. ably smaller winding pitch, forming a mesh assembly. In Fig. 2 the support is a single helical wire 4, it is shown as passing alternately over and under the filament helices 1, 2, 3, but it may be wholly inside or outside. The support helix may be of, or covered with, insulating material, and may have notches to locate the filament wires, Figs. 3a, 3b (not shown), or stops for the same purpose, Figs. 3c, 3d, 3e (not shown). When more than one supporting helix is provided, each may be arranged to support every second or third filament helix only, so that the filament helices constitute separate groups which can be fed from a polyphase supply. All the wires may be of stranded construction, and Figs. 4a, 4b (not shown) illustrate methods of attaching their ends to terminal plates. The input conductors may be coated with zirconium for gettering.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1034276X | 1952-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB736542A true GB736542A (en) | 1955-09-07 |
Family
ID=9585003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8427/53A Expired GB736542A (en) | 1952-03-28 | 1953-03-26 | Improvements relating to thermionic cathodes |
Country Status (4)
| Country | Link |
|---|---|
| CH (1) | CH327481A (en) |
| DE (1) | DE1034276B (en) |
| FR (1) | FR1053139A (en) |
| GB (1) | GB736542A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3449616A (en) * | 1965-07-20 | 1969-06-10 | Thomson Houston Comp Francaise | Tubular mesh cathode for high-power electronic tubes |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2385973A (en) * | 1942-08-24 | 1945-10-02 | Eitel Mccullough Inc | Apparatus for making grids |
| US2358200A (en) * | 1943-10-02 | 1944-09-12 | Gen Electric X Ray Corp | Grid assembly structure |
| FR911302A (en) * | 1945-01-11 | 1946-07-04 | Radioelectriques S A Lab | Improvements to electronic tubes |
| US2457626A (en) * | 1945-07-03 | 1948-12-28 | Gen Electric X Ray Corp | Grid construction |
| DE863830C (en) * | 1950-05-17 | 1953-01-19 | Siemens Ag | Cathode for electron tubes |
| NL86395C (en) * | 1950-05-17 | |||
| DE857100C (en) * | 1950-06-30 | 1952-11-27 | Siemens Ag | Fastening of heating threads, especially in the case of high-performance discharge tubes |
| DE839235C (en) * | 1950-08-20 | 1952-05-19 | Siemens Ag | Electron tubes, in particular transmitter tubes |
-
1952
- 1952-03-28 FR FR1053139D patent/FR1053139A/en not_active Expired
-
1953
- 1953-03-26 GB GB8427/53A patent/GB736542A/en not_active Expired
- 1953-03-27 DE DEC7334A patent/DE1034276B/en active Pending
- 1953-03-28 CH CH327481D patent/CH327481A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3449616A (en) * | 1965-07-20 | 1969-06-10 | Thomson Houston Comp Francaise | Tubular mesh cathode for high-power electronic tubes |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1053139A (en) | 1954-02-01 |
| DE1034276B (en) | 1958-07-17 |
| CH327481A (en) | 1958-01-31 |
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