GB457848A - Improvements in or relating to television cathode ray tubes - Google Patents
Improvements in or relating to television cathode ray tubesInfo
- Publication number
- GB457848A GB457848A GB25752/36A GB2575236A GB457848A GB 457848 A GB457848 A GB 457848A GB 25752/36 A GB25752/36 A GB 25752/36A GB 2575236 A GB2575236 A GB 2575236A GB 457848 A GB457848 A GB 457848A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plates
- anode
- deflecting
- ray tubes
- auxiliary
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
- H04N3/02—Scanning details of television systems; Combination thereof with generation of supply voltages by optical-mechanical means only
- H04N3/04—Scanning details of television systems; Combination thereof with generation of supply voltages by optical-mechanical means only having a moving aperture also apertures covered by lenses
-
- 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
- H01J29/58—Arrangements for focusing or reflecting ray or beam
- H01J29/62—Electrostatic lenses
- H01J29/622—Electrostatic lenses producing fields exhibiting symmetry of revolution
- H01J29/624—Electrostatic lenses producing fields exhibiting symmetry of revolution co-operating with or closely associated to an electron gun
-
- 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
- H01J29/70—Arrangements for deflecting ray or beam
- H01J29/72—Arrangements for deflecting ray or beam along one straight line or along two perpendicular straight lines
- H01J29/74—Deflecting by electric fields only
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
457,848. Cathode-ray tubes. RADIOAKT.-GES. D. S. LOEWE, 10, Wiesenweg, Steglitz, Berlin. March 4, 1935, No. 25752/36. Convention date, March 3, 1934. Divided out of 457,757. [Class 39 (i)] Television cathode-ray tubes, highly evacuated or filled with gas of less than 5.10<-5> mm. pressure and having an electrostatic reproducing lens and electrostatic deflection in at least one direction, are provided with two auxiliary plates 25 near the aperture of the anode 12 at the side facing the deflecting plates. The auxiliary plates are parallel to the axis of the tube and perpendicular to the adjacent deflecting plates 13, 14 and are both maintained at the same potential relatively to the anode 12 to adjust the refractive power of the lens perpendicular to the deflecting field of the plates 13, 14 so that the image on the luminous screen 8 is a true reproduction of the object reproduced, for example, of the aperture 7 in the diaphragm 6 connected to the anode 12. To produce this effect, the potential of the plates 25 may be adjusted by a potentiometer 9<a> or the plates may be connected directly to the anode 12 and suitably dimensioned. To reduce disturbances in the electron-optical reproduction due to the varying deflecting potentials on the deflecting plates 13 .. 16 and also to avoid trapezium distortion of the picture, the plates are positioned and operated in reverse phase as described in Specification 452,650 and are provided with auxiliary electrodes 13<1>.. 16<1> at their edges. The two auxiliary electrodes associated with each deflecting plate are connected together and to the opposite deflecting plate. The bulb between the anode 12 and the screen 8 is wholly or partly coated with metal 19 earthed through a spring 20 and the anode 12. An earthed iron cylinder 34 not more than À5 mm. thick is provided about the neck of the tube to shield the ray electrically and magnetically. The electron lens 9, 12 may be as described in Specification 457,846. Specification 449,245 also is referred to.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2137353X | 1934-03-03 | ||
| DE456331X | 1934-03-31 | ||
| US8660A US2137353A (en) | 1934-03-03 | 1935-02-28 | Television tube |
| US213731A US2197899A (en) | 1934-03-03 | 1938-06-15 | Television tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB457848A true GB457848A (en) | 1936-12-04 |
Family
ID=32074463
Family Applications (5)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6688/35A Expired GB457757A (en) | 1934-03-03 | 1935-03-04 | Television cathode ray tube |
| GB20744/36A Expired GB457846A (en) | 1934-03-03 | 1935-03-04 | Improvements in or relating to television tubes |
| GB25752/36A Expired GB457848A (en) | 1934-03-03 | 1935-03-04 | Improvements in or relating to television cathode ray tubes |
| GB25754/36A Expired GB456331A (en) | 1934-03-03 | 1935-03-04 | Improvements in or relating to braun tubes, preferably for television purposes |
| GB25753/36A Expired GB456717A (en) | 1934-03-03 | 1935-03-04 | Improvements in or relating to braun tubes and circuits therefore, preferably for television purposes |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6688/35A Expired GB457757A (en) | 1934-03-03 | 1935-03-04 | Television cathode ray tube |
| GB20744/36A Expired GB457846A (en) | 1934-03-03 | 1935-03-04 | Improvements in or relating to television tubes |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25754/36A Expired GB456331A (en) | 1934-03-03 | 1935-03-04 | Improvements in or relating to braun tubes, preferably for television purposes |
| GB25753/36A Expired GB456717A (en) | 1934-03-03 | 1935-03-04 | Improvements in or relating to braun tubes and circuits therefore, preferably for television purposes |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2197899A (en) |
| BE (2) | BE408184A (en) |
| FR (1) | FR786632A (en) |
| GB (5) | GB457757A (en) |
| NL (1) | NL51359C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE766496C (en) * | 1936-01-29 | 1952-04-10 | Aeg | Electron-optical image converter |
| US2572858A (en) * | 1947-06-03 | 1951-10-30 | Sylvania Electric Prod | Electron optical system |
-
0
- NL NL51359D patent/NL51359C/xx active
- BE BE408183D patent/BE408183A/xx unknown
- BE BE408184D patent/BE408184A/xx unknown
-
1935
- 1935-03-02 FR FR786632D patent/FR786632A/en not_active Expired
- 1935-03-04 GB GB6688/35A patent/GB457757A/en not_active Expired
- 1935-03-04 GB GB20744/36A patent/GB457846A/en not_active Expired
- 1935-03-04 GB GB25752/36A patent/GB457848A/en not_active Expired
- 1935-03-04 GB GB25754/36A patent/GB456331A/en not_active Expired
- 1935-03-04 GB GB25753/36A patent/GB456717A/en not_active Expired
-
1938
- 1938-06-15 US US213731A patent/US2197899A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| GB457846A (en) | 1936-12-04 |
| GB456717A (en) | 1936-11-04 |
| BE408183A (en) | |
| US2197899A (en) | 1940-04-23 |
| GB457757A (en) | 1936-12-04 |
| GB456331A (en) | 1936-11-04 |
| BE408184A (en) | |
| NL51359C (en) | |
| FR786632A (en) | 1935-09-06 |
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