GB356978A - Improvements in or relating to electric discharge tubes - Google Patents
Improvements in or relating to electric discharge tubesInfo
- Publication number
- GB356978A GB356978A GB31754/30A GB3175430A GB356978A GB 356978 A GB356978 A GB 356978A GB 31754/30 A GB31754/30 A GB 31754/30A GB 3175430 A GB3175430 A GB 3175430A GB 356978 A GB356978 A GB 356978A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- cathodes
- emitting material
- bore
- discharge tubes
- 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
- H01J29/485—Construction of the gun or of parts thereof
Abstract
356,978. Discharge apparatus. TELEFUNKEN G E S. F U R DRAHTLOSE TELEGRAPHIE, 12, Hallesches Ufer, Berlin. Oct. 22, 1930, No. 31754. Convention date, Nov. 9, 1929. [Class 39 (i).] Cathodes of cathode-ray tubes for measuring, picture transmission, &c., comprise a hollow body 1 with an internal narrow bore 3 of the order of 1 mm. diameter heated by a surrounding cylindrical winding 2, the inner surface of the bore being coated w it h electron - emitting material to form the cathode proper and an annular disc 6 or cap being situated in the path of the electron stream at its exit from the body 1. The body 1 is of ceramic material such as magnesia and comprises a central hollow core 1a and an outer cylinder 1b. The cathode lead 5 is connected to a metal support 4 for the emitting material. The disc 6 may operate as the anode or control electrode. Space charge inside the cathode may be compensated for by small quantities of gas. The Specification as open to inspection under Sect. 91 (3) (a) comprises also the application of the cathodes to other discharge tubes. This subjectmatter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE356978X | 1929-11-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB356978A true GB356978A (en) | 1931-09-17 |
Family
ID=6290434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB31754/30A Expired GB356978A (en) | 1929-11-09 | 1930-10-22 | Improvements in or relating to electric discharge tubes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB356978A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2452044A (en) * | 1943-08-14 | 1948-10-26 | Fox Benjamin | High emission cathode |
| US2573287A (en) * | 1950-06-23 | 1951-10-30 | Rauland Corp | Electron gun for cathode-ray tubes |
| US2584791A (en) * | 1947-08-12 | 1952-02-05 | Rca Corp | Cathode for magnetrons |
| US2632130A (en) * | 1947-11-28 | 1953-03-17 | Joseph F Hull | High current density beam tube |
-
1930
- 1930-10-22 GB GB31754/30A patent/GB356978A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2452044A (en) * | 1943-08-14 | 1948-10-26 | Fox Benjamin | High emission cathode |
| US2584791A (en) * | 1947-08-12 | 1952-02-05 | Rca Corp | Cathode for magnetrons |
| US2632130A (en) * | 1947-11-28 | 1953-03-17 | Joseph F Hull | High current density beam tube |
| US2573287A (en) * | 1950-06-23 | 1951-10-30 | Rauland Corp | Electron gun for cathode-ray tubes |
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