GB494586A - Improvements in or relating to deflecting means for use with electron discharge devices - Google Patents
Improvements in or relating to deflecting means for use with electron discharge devicesInfo
- Publication number
- GB494586A GB494586A GB1201537A GB1201537A GB494586A GB 494586 A GB494586 A GB 494586A GB 1201537 A GB1201537 A GB 1201537A GB 1201537 A GB1201537 A GB 1201537A GB 494586 A GB494586 A GB 494586A
- Authority
- GB
- United Kingdom
- Prior art keywords
- yoke
- polepieces
- tube
- extensions
- deflecting means
- 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)
- Apparatus For Disinfection Or Sterilisation (AREA)
Abstract
494,586. Discharge apparatus. BAIRD TELEVISION, Ltd., and TINGLEY, G. R. April 27, 1937, No. 12015. [Class 39 (i)] Magnetic deflecting means for an electrondischarge device such as a cathode-ray tube comprise a U - shaped ferromagnetic yoke 1, Fig. 2, the limbs of which embrace the tube 4 and are provided with substantially semi-cylindrical polepieces 3 the length of which in the direction of the electron beam is substantially greater than that of the yoke, and the dimensions of the polepieces are such that they form an almost closed cylinder round the tube ; coils 2 and 5 are provided on the yoke and within the polepieces for producing components of the deflecting field at right-angles to one another. Extensions to form a gapped or closed iron circuit may be provided on the core to increase the inductance of the coil 2. In a modification, Fig. 1, the polepieces 3 are displaced from the yoke 1 towards the source of electrons and are connected to the yoke by ferromagnetic strips 7. The yoke also may be provided with small extrusions 8 embracing the tube 4 and with extensions 9 having adjustable polepieces as described in Specification 462,684. This modification is stated to give a better correction of the " pincushion " distortion and prevents barrel distortion while reducing the interaction between the scanning fields.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1201537A GB494586A (en) | 1937-04-27 | 1937-04-27 | Improvements in or relating to deflecting means for use with electron discharge devices |
DEF84872D DE751093C (en) | 1937-04-27 | 1938-04-28 | Electromagnetic deflection device for cathode ray tubes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1201537A GB494586A (en) | 1937-04-27 | 1937-04-27 | Improvements in or relating to deflecting means for use with electron discharge devices |
Publications (1)
Publication Number | Publication Date |
---|---|
GB494586A true GB494586A (en) | 1938-10-27 |
Family
ID=9996864
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1201537A Expired GB494586A (en) | 1937-04-27 | 1937-04-27 | Improvements in or relating to deflecting means for use with electron discharge devices |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE751093C (en) |
GB (1) | GB494586A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE742390C (en) * | 1939-07-04 | 1943-12-01 | Fernseh Gmbh | Ferromagnetic deflection system for cathode ray tubes |
DE743844C (en) * | 1939-02-08 | 1944-01-04 | Fernseh Gmbh | Electromagnetic deflection system for electron beam tubes |
DE757628C (en) * | 1939-06-25 | 1954-02-01 | Telefunken Gmbh | Coil arrangement for cathode ray deflection |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE912822C (en) * | 1950-02-14 | 1954-06-03 | Telefunken Gmbh | Arrangement for eliminating a dip in the frequency curve of a low-frequency transmission device for a larger frequency range by a transmitter with chamber windings and / or nested windings or by a choke with chamber windings |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1981322A (en) * | 1932-11-16 | 1934-11-20 | Nakajima Tomomasa | Cathode ray tube |
NL39451C (en) * | 1933-12-07 | |||
DE739047C (en) * | 1935-09-30 | 1943-09-09 | Fernseh Gmbh | Deflection coil system for electron beam tubes |
AT151610B (en) * | 1936-02-28 | 1937-11-25 | Rca Corp | Deflection coil system for cathode ray tubes. |
-
1937
- 1937-04-27 GB GB1201537A patent/GB494586A/en not_active Expired
-
1938
- 1938-04-28 DE DEF84872D patent/DE751093C/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE743844C (en) * | 1939-02-08 | 1944-01-04 | Fernseh Gmbh | Electromagnetic deflection system for electron beam tubes |
DE757628C (en) * | 1939-06-25 | 1954-02-01 | Telefunken Gmbh | Coil arrangement for cathode ray deflection |
DE742390C (en) * | 1939-07-04 | 1943-12-01 | Fernseh Gmbh | Ferromagnetic deflection system for cathode ray tubes |
Also Published As
Publication number | Publication date |
---|---|
DE751093C (en) | 1958-04-24 |
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