GB490278A - Improvements in or relating to cathode ray television apparatus - Google Patents
Improvements in or relating to cathode ray television apparatusInfo
- Publication number
- GB490278A GB490278A GB4793/38A GB479338A GB490278A GB 490278 A GB490278 A GB 490278A GB 4793/38 A GB4793/38 A GB 4793/38A GB 479338 A GB479338 A GB 479338A GB 490278 A GB490278 A GB 490278A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragm
- potential
- lens
- image
- cathode
- 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
- H01J29/56—Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses
Landscapes
- Transforming Electric Information Into Light Information (AREA)
- Details Of Television Scanning (AREA)
- Electron Sources, Ion Sources (AREA)
Abstract
490,278. Cathode-ray tubes. RADIOAKT.-GES. D. S. LOEWE. Feb. 10, 1937, No. 4793/38. Divided out of and addition to 480,521 under which a Specification was laid open to inspection under Sect. 91 of the Acts, Nov. 23, 1936. [Class 39 (i)] In a cathode-ray tube adapted for use with different numbers of scanning lines wherein the image point is produced by an electronoptical lens 4 as the image of the aperture in the diaphragm 1, the size of the image point is regulated by variation of the potential of the diaphragm ; the potential of the anode 4 is kept constant, and is not simultaneously varied to keep the image intensity constant, as described in the parent Specification. The potential of the intermediate electrode 2 is obtained from a fixed tapping on the potentiometer 9 connected across the anode supply 4<1>, and the focus of the lens 2, 4 remains unaltered when the potential of the diaphragm is varied. A preliminary lens 7, 8 lights up the diaphragm 1.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE480521X | 1935-05-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB490278A true GB490278A (en) | 1938-08-10 |
Family
ID=6542552
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB14514/36A Expired GB480521A (en) | 1935-05-22 | 1936-05-22 | Improvements in or relating to cathode ray television apparatus |
| GB4793/38A Expired GB490278A (en) | 1935-05-22 | 1937-02-10 | Improvements in or relating to cathode ray television apparatus |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB14514/36A Expired GB480521A (en) | 1935-05-22 | 1936-05-22 | Improvements in or relating to cathode ray television apparatus |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2227005A (en) |
| FR (1) | FR806952A (en) |
| GB (2) | GB480521A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2573247A (en) * | 1949-01-03 | 1951-10-30 | Rca Corp | Means for signal amplifying and mixing utilizing space charge neutralization |
| US2703339A (en) * | 1950-02-03 | 1955-03-01 | Rca Corp | Television scanning system |
-
1936
- 1936-05-19 US US80582A patent/US2227005A/en not_active Expired - Lifetime
- 1936-05-22 GB GB14514/36A patent/GB480521A/en not_active Expired
- 1936-05-29 FR FR806952D patent/FR806952A/en not_active Expired
-
1937
- 1937-02-10 GB GB4793/38A patent/GB490278A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR806952A (en) | 1936-12-30 |
| US2227005A (en) | 1940-12-31 |
| GB480521A (en) | 1938-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB453043A (en) | Improvements in or relating to cathode ray tube television and like reproducer apparatus | |
| GB487241A (en) | Cathode ray tubes for intensity-controlled illumination | |
| GB490278A (en) | Improvements in or relating to cathode ray television apparatus | |
| GB420876A (en) | Braun tube | |
| GB497645A (en) | Improvements in or relating to electron lenses | |
| GB495707A (en) | Improvements in or relating to focussing systems for use in electric discharge tubes | |
| GB480672A (en) | Improvements in or relating to cathode ray tubes for television | |
| GB495185A (en) | Improvements in or relating to television cathode ray tubes | |
| GB517483A (en) | Improvements in or relating to television and like receivers | |
| FR846578A (en) | Cathode ray tube with intensity control especially for television | |
| GB422041A (en) | Improvements in and relating to cathode ray tubes for television purposes | |
| GB452125A (en) | Improvements in and relating to cathode ray tubes | |
| GB431774A (en) | Improvements in and relating to braun tubes | |
| GB455084A (en) | Improvements in or relating to cathode ray tubes and circuits therefor | |
| GB470496A (en) | Television tube | |
| GB399192A (en) | Television reception arrangement with braun tube | |
| GB411411A (en) | Improvements in or relating to cathode ray tubes suitable for use for television and like purposes | |
| GB439737A (en) | Improvements in or relating to television, picture telegraphy and the like | |
| GB456331A (en) | Improvements in or relating to braun tubes, preferably for television purposes | |
| GB405977A (en) | Improvements in and relating to cathode-ray tubes | |
| GB494967A (en) | Improvements in or relating to television and like apparatus | |
| GB496812A (en) | Improvements in or relating to electro-magnetic deflecting coils for cathode ray tubes | |
| GB499662A (en) | Improvements in or relating to electron discharge devices for use in television and like systems | |
| SU108554A1 (en) | A method of improving the quality of a raster in a photo-telegraph system | |
| GB426706A (en) | Improvements in or relating to cathode ray tubes for use for television and like purposes |