GB751818A - Improvements in electron sources - Google Patents
Improvements in electron sourcesInfo
- Publication number
- GB751818A GB751818A GB16676/54A GB1667654A GB751818A GB 751818 A GB751818 A GB 751818A GB 16676/54 A GB16676/54 A GB 16676/54A GB 1667654 A GB1667654 A GB 1667654A GB 751818 A GB751818 A GB 751818A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- slot
- sliding contact
- cylinder
- june
- 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
- H01J21/00—Vacuum tubes
- H01J21/02—Tubes with a single discharge path
- H01J21/06—Tubes with a single discharge path having electrostatic control means only
- H01J21/08—Tubes with a single discharge path having electrostatic control means only with movable electrode or electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
- H01J3/02—Electron guns
- H01J3/028—Replacing parts of the gun; Relative adjustment
Landscapes
- Microwave Tubes (AREA)
Abstract
751,818. Thermionic-cathode tubes. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. June 4, 1954 [June 4, 1953], No. 16676/54. Class 39 (1). A rotating cathode 9 is surrounded by a screen 12 having a potential not greater than the cathode, and having a slot 11 or 11a facing the cathode. This may be a cylinder rotated by a conventional rotor and stator winding. A slot 1 mm. wide is suggested, with a cylinder of 2 cm. diameter and a speed of 50 r.p.s. Thus each point on the cathode is in front of the slot for 1/1000# sec. at a time, 50 times per second, so that the equivalent is obtained of continuous emission under conditions of pulsed emission, with higher permanent current in consequence. Since the cathode is rotating, a sliding contact 21 is provided. In order to avoid passing a high current through this sliding contact, the arrangement of Fig. 3 may be used. Here the sliding contact 21 merely serves to bring cathode 9 to the appropriate potential. The main cathode current passes through a fixed cathode 22 with heater 23, which is inside cathode cylinder 9, and negatively biased with respect to it. The latter is maintained at emission temperature by bombardment from the inner cathode 22. An independently biased grid 24 may be provided. The cathode is used in the travelling-wave tube more fully described in U.S.A. Specification 2,694,783.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR751818X | 1953-06-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB751818A true GB751818A (en) | 1956-07-04 |
Family
ID=9156329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB16676/54A Expired GB751818A (en) | 1953-06-04 | 1954-06-04 | Improvements in electron sources |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB751818A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3290540A (en) * | 1964-04-16 | 1966-12-06 | Westinghouse Electric Corp | Electron discharge tube having a movable cathode tape |
-
1954
- 1954-06-04 GB GB16676/54A patent/GB751818A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3290540A (en) * | 1964-04-16 | 1966-12-06 | Westinghouse Electric Corp | Electron discharge tube having a movable cathode tape |
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