GB412092A - Improvements in or relating to television apparatus - Google Patents
Improvements in or relating to television apparatusInfo
- Publication number
- GB412092A GB412092A GB30081/33A GB3008133A GB412092A GB 412092 A GB412092 A GB 412092A GB 30081/33 A GB30081/33 A GB 30081/33A GB 3008133 A GB3008133 A GB 3008133A GB 412092 A GB412092 A GB 412092A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screen
- ray
- axis
- oct
- scan
- 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
- H01J29/70—Arrangements for deflecting ray or beam
- H01J29/72—Arrangements for deflecting ray or beam along one straight line or along two perpendicular straight lines
- H01J29/76—Deflecting by magnetic fields only
Landscapes
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Abstract
412,092. Cathode-ray tubes. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, London.-(Assignees of Campbell, R. L. ; 56, Ridgeway Avenue, Oaklyn, New Jersey, U.S.A.) Oct. 30, 1933, No. 30081. Convention date, Oct. 29, 1932. [Class 39 (i).] A television system has a cathode-ray tube 10 with a screen 12 inclined to the axis of electron gun 20 and with deflecting fields for causing the ray to scan the screen, an additional constant magnetic field being superposed on the ray during the scanning action to cause it to scan a keystone-shaped area in a plane at right-angles to the axis 22 of the gun 20 and so a rectangular area on the inclined screen 12. The scanning fields are produced by currents of saw-tooth wave-form in coils 28, 32 on pole-pieces of a magnetic core 30 surrounding the tube 10 and the constant magnetic field is produced by a U-shaped permanent or electromagnet 34 with its poles 36, 38 beyond the core 30 and on opposite sides of a vertical plane through the axis 22. Distortions near the corners of the scanned area are corrected by magnets 44. In a television transmitter, an image to be transmitted is projected in a normal direction on to the screen 12 which is composed of minute, insulated, photo-sensitized silver globules receiving a charge according to the brightness of the corresponding point of the image.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US640169A US1995376A (en) | 1932-10-29 | 1932-10-29 | Television system |
Publications (1)
Publication Number | Publication Date |
---|---|
GB412092A true GB412092A (en) | 1934-06-21 |
Family
ID=24567114
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB30081/33A Expired GB412092A (en) | 1932-10-29 | 1933-10-30 | Improvements in or relating to television apparatus |
Country Status (3)
Country | Link |
---|---|
US (1) | US1995376A (en) |
FR (1) | FR762416A (en) |
GB (1) | GB412092A (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2563525A (en) * | 1951-08-07 | Image size control device for | ||
GB443952A (en) * | 1934-07-04 | 1936-03-04 | Michael Bowman Manifold | Improvements in and relating to electrical circuits for the deflection of cathode ray beams |
USB385358I5 (en) * | 1935-10-31 | |||
NL67155C (en) * | 1946-03-02 | |||
US2498354A (en) * | 1946-12-03 | 1950-02-21 | Philco Corp | Magnetic lens system |
FR944238A (en) * | 1947-03-13 | 1949-03-30 | Csf | Electronic optics correction method |
US2513221A (en) * | 1948-07-01 | 1950-06-27 | Rca Corp | Register correction for television |
US2534557A (en) * | 1949-01-19 | 1950-12-19 | Tele Tone Radio Corp | Keystoning circuit |
US2568456A (en) * | 1949-12-06 | 1951-09-18 | Gen Electric | Electromagnetic deflection yoke structure |
BE515724A (en) * | 1951-11-24 | |||
BE529660A (en) * | 1953-09-24 |
-
1932
- 1932-10-29 US US640169A patent/US1995376A/en not_active Expired - Lifetime
-
1933
- 1933-10-17 FR FR762416D patent/FR762416A/en not_active Expired
- 1933-10-30 GB GB30081/33A patent/GB412092A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US1995376A (en) | 1935-03-26 |
FR762416A (en) | 1934-04-11 |
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