GB668183A - Improvements in or relating to deflecting circuits for cathode ray tubes - Google Patents
Improvements in or relating to deflecting circuits for cathode ray tubesInfo
- Publication number
- GB668183A GB668183A GB1069149A GB1069149A GB668183A GB 668183 A GB668183 A GB 668183A GB 1069149 A GB1069149 A GB 1069149A GB 1069149 A GB1069149 A GB 1069149A GB 668183 A GB668183 A GB 668183A
- Authority
- GB
- United Kingdom
- Prior art keywords
- deflecting
- current
- windings
- winding
- equal
- 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
- H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
- H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
- H04N3/22—Circuits for controlling dimensions, shape or centering of picture on screen
- H04N3/227—Centering
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Details Of Television Scanning (AREA)
Abstract
668,183. Cathode-ray tube circuits. ELECTRIC & MUSICAL INDUSTRIES, Ltd. April 24, 1950 [April 22, 1949], No. 10691/49. Class 37. [Also in Group XL (b)] In a cathode-ray tube beam deflecting circuit in which the deflecting coils are supplied with deflecting current from the secondary winding of a transformer, the winding is divided into two similar windings and means are provided for applying raster shift direct-current to the latter windings in such a manner that the current divides equally into the windings in opposing relationship so as to produce zero resultant magnetizing field. In the arrangement shown the deflecting coils 2 are connected across the " outer " ends of the two-secondary windings 4, 5, and the " inner " ends are connected together through a resistance 6 equal to the resistance 7, 8, of the deflecting coils so that two parallel paths of equal resistance exist between the " outer " end of winding 4 and the " inner " end of winding 5. When " shift " current is fed to these points (from source 9 and ganged potentiometers 11, 12, which move in opposite directions) equal and opposite currents flow in windings 4, 5, and zero magnetizing field is set up in the transformer. A choke coil 14, having an inductance which is large compared with that of the deflecting coils and a condenser 13 connected as shown, prevent deflecting current from passing into the source 9. The deflecting current source 1 may be the line or frame scanning waveform generator of a television system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1069149A GB668183A (en) | 1949-04-22 | 1949-04-22 | Improvements in or relating to deflecting circuits for cathode ray tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1069149A GB668183A (en) | 1949-04-22 | 1949-04-22 | Improvements in or relating to deflecting circuits for cathode ray tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB668183A true GB668183A (en) | 1952-03-12 |
Family
ID=9972510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1069149A Expired GB668183A (en) | 1949-04-22 | 1949-04-22 | Improvements in or relating to deflecting circuits for cathode ray tubes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB668183A (en) |
-
1949
- 1949-04-22 GB GB1069149A patent/GB668183A/en not_active Expired
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