GB386706A - Improvements in or relating to incandescent cathodes for thermionic tubes - Google Patents
Improvements in or relating to incandescent cathodes for thermionic tubesInfo
- Publication number
- GB386706A GB386706A GB23612/31A GB2361231A GB386706A GB 386706 A GB386706 A GB 386706A GB 23612/31 A GB23612/31 A GB 23612/31A GB 2361231 A GB2361231 A GB 2361231A GB 386706 A GB386706 A GB 386706A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- filament
- aug
- thermionic
- relating
- 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
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/48—Electron guns
- H01J29/484—Eliminating deleterious effects due to thermal effects, electrical or magnetic fields; Preventing unwanted emission
Landscapes
- Electron Sources, Ion Sources (AREA)
Abstract
386,706. Thermionic cathodes. LIGNOSE HORFILM SYSTEM BREUSING GES., 32, Lindenstrasse, Berlin. Aug. 21, 1931, No. 23612. Convention date, Aug. 21, 1930. [Class 39 (i).] In a thermionic tube, particularly a cathode - ray tube, the magnetic effect of the cathode beating current on the electron stream is reduced by forming the filament in the shape of a figure 8 open at the bottom. In a modification, Fig. 5, the cathode P consists of two coaxial coils in series arranged so that their magnetic fields oppose each other.. An auxiliary cylinder C may be disposed round the filament and may have a fixed or variable potential applied to it; the variable potential may be superposed on a high frequency. Theleads may be twisted together.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE386706X | 1930-08-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB386706A true GB386706A (en) | 1933-01-26 |
Family
ID=6371018
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB23612/31A Expired GB386706A (en) | 1930-08-21 | 1931-08-21 | Improvements in or relating to incandescent cathodes for thermionic tubes |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR723093A (en) |
GB (1) | GB386706A (en) |
-
1931
- 1931-08-21 GB GB23612/31A patent/GB386706A/en not_active Expired
- 1931-08-21 FR FR723093D patent/FR723093A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR723093A (en) | 1932-04-02 |
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