GB457846A - Improvements in or relating to television tubes - Google Patents
Improvements in or relating to television tubesInfo
- Publication number
- GB457846A GB457846A GB20744/36A GB2074436A GB457846A GB 457846 A GB457846 A GB 457846A GB 20744/36 A GB20744/36 A GB 20744/36A GB 2074436 A GB2074436 A GB 2074436A GB 457846 A GB457846 A GB 457846A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragm
- disc
- cathode
- march
- tube
- 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)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
Abstract
457,846. Cathode-ray tubes. RADIOAKT.-GES. D. S. LOEWE, 10, Wiesenweg, Steglitz, Berlin. March 4, 1935, No. 20744/36. Convention date, March 3, 1934. Divided out of 457,757. [Class 39 (i)] In television cathode - ray tubes highly evacuated or filled with gas at a pressure below 5.10<-5> mm., in which an electron lens produces a real image on the luminous screen of an object such as a circular or square aperture 7 in a diaphragm 6, Fig. 2, the lens is made spherically corrected by forming it as an apertured disc 12 positive with respect to a tubular electrode 9 having an apertured diaphragm 10 within it, the distance of the disc 12 from the diaphragm 10 being at least equal to, and preferably twice, the diameter of the aperture in the diaphragm 10. The diaphragm 10 is at distance from the end 11 of the tube 9 preferably not greater than the radius of the tube 9 and serves to prevent the equipotential surfaces extending too deeply into the end 11 and so to avoid disproportionate refraction of marginal rays : this effect may be aided by spherical segments 33, Fig. 1, inside the end 11. The disc 12 may be part of the anode described in Specification 457,757 and may be connected to the diaphragm 6. Similar considerations may be applied to the spacing of the diaphragm 6 from the control electrode in the form of a cylinder 4 and internal diaphragm 5. Dimensions and voltages are specified : the emissive oxide surface on the indirectly heated cathode 1 may be À3mm. in diameter. A coating 19, magnetic sheath 34, and deflecting plates operated and associated with auxiliary electrodes 13<1> as described in Specification 457,848 may be provided or the ray may be deflected magnetically. Specification 431,327 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 |
|---|---|
| GB457846A true GB457846A (en) | 1936-12-04 |
Family
ID=32074463
Family Applications (5)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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 |
| GB20744/36A Expired GB457846A (en) | 1934-03-03 | 1935-03-04 | Improvements in or relating to television tubes |
| GB25754/36A Expired GB456331A (en) | 1934-03-03 | 1935-03-04 | Improvements in or relating to braun tubes, preferably for television purposes |
| GB25752/36A Expired GB457848A (en) | 1934-03-03 | 1935-03-04 | Improvements in or relating to television cathode ray tubes |
| GB6688/35A Expired GB457757A (en) | 1934-03-03 | 1935-03-04 | Television cathode ray tube |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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 After (3)
| 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 |
| GB25752/36A Expired GB457848A (en) | 1934-03-03 | 1935-03-04 | Improvements in or relating to television cathode ray tubes |
| GB6688/35A Expired GB457757A (en) | 1934-03-03 | 1935-03-04 | Television cathode ray tube |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2197899A (en) |
| BE (2) | BE408184A (en) |
| FR (1) | FR786632A (en) |
| GB (5) | GB456717A (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 GB25753/36A patent/GB456717A/en not_active Expired
- 1935-03-04 GB GB20744/36A patent/GB457846A/en not_active Expired
- 1935-03-04 GB GB25754/36A patent/GB456331A/en not_active Expired
- 1935-03-04 GB GB25752/36A patent/GB457848A/en not_active Expired
- 1935-03-04 GB GB6688/35A patent/GB457757A/en not_active Expired
-
1938
- 1938-06-15 US US213731A patent/US2197899A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| GB456331A (en) | 1936-11-04 |
| US2197899A (en) | 1940-04-23 |
| NL51359C (en) | |
| GB457848A (en) | 1936-12-04 |
| BE408184A (en) | |
| FR786632A (en) | 1935-09-06 |
| GB457757A (en) | 1936-12-04 |
| BE408183A (en) | |
| GB456717A (en) | 1936-11-04 |
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