GB1048452A - Improvements in or relating to magnetic deflecting means for cathode-ray tubes - Google Patents
Improvements in or relating to magnetic deflecting means for cathode-ray tubesInfo
- Publication number
- GB1048452A GB1048452A GB4537/65A GB453765A GB1048452A GB 1048452 A GB1048452 A GB 1048452A GB 4537/65 A GB4537/65 A GB 4537/65A GB 453765 A GB453765 A GB 453765A GB 1048452 A GB1048452 A GB 1048452A
- Authority
- GB
- United Kingdom
- Prior art keywords
- current
- deflection
- network
- cathode
- shunted
- 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
-
- 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
- H01J29/003—Arrangements for eliminating unwanted electromagnetic effects, e.g. demagnetisation arrangements, shielding coils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2229/00—Details of cathode ray tubes or electron beam tubes
- H01J2229/0007—Elimination of unwanted or stray electromagnetic effects
- H01J2229/0046—Preventing or cancelling fields within the enclosure
- H01J2229/0053—Demagnetisation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2229/00—Details of cathode ray tubes or electron beam tubes
- H01J2229/96—Circuit elements other than coils, reactors or the like, associated with the tube
- H01J2229/964—Circuit elements other than coils, reactors or the like, associated with the tube associated with the deflection system
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
1,048,452. Demagnetizing apparatus. HOLLANDSE SIGNAALAPPARATEN N.V. Feb. 2, 1965 [Feb. 12, 1964], No. 4537/65. Heading H1P. [Also in Division H4]. In an arrangement for eliminating residual magnetism in the ferro-magnetic yoke 2 (Fig. 1) of a cathode-ray tube deflection system, each deflection coil L 1 and its associated damping resistors R 1 is shunted by a two-terminal network 4, comprising an inductance L 2 and an adjustable resistor R 2 either series connected, as shown, or parallel connected, the time-constant of such network being greater than that of L 1 , R 1 so that at the end of a cycle of the sawtooth waves from generator 3, when the driving current i 0 (see also Fig. 2, not shown) has reached zero, the current i L1 in the deflection coils decays at a faster rate than the current i L2 in network 4 and thus when the former current reaches zero (T 2 , Fig. 2) the continued decay of the latter results in a current flow through L 1 in the opposite direction to the original decay current. This negative current eliminates the residual magnetism and the next beam deflection commencing at T 3 (Fig. 2) is independent of the previous one. The networks 4 may be located at a position remote from the tube and may be shunted across only part of the coils L 1 .
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL646401167A NL140650B (en) | 1964-02-12 | 1964-02-12 | DEFLECTION SYSTEM FOR A CATHOD RADIUS TUBE WHICH SYSTEM EQUIPPES EACH DEFLECTION COIL WITH RESISTANT MEANS FOR CANCELLATION OF REMANENT MAGNETISM IN THE FERROMAGNETIC CORE OF THE NORMALITER CRITICALLY MUFFLED. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1048452A true GB1048452A (en) | 1966-11-16 |
Family
ID=19789250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4537/65A Expired GB1048452A (en) | 1964-02-12 | 1965-02-02 | Improvements in or relating to magnetic deflecting means for cathode-ray tubes |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3456149A (en) |
| BE (1) | BE659100A (en) |
| CH (1) | CH415741A (en) |
| DE (1) | DE1274744B (en) |
| GB (1) | GB1048452A (en) |
| NL (1) | NL140650B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4095143A (en) * | 1976-07-21 | 1978-06-13 | Gte Sylvania Incorporated | Electron beam crossover correction circuitry |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7112929A (en) * | 1971-09-21 | 1973-03-23 | ||
| NL7707476A (en) * | 1977-07-06 | 1979-01-09 | Philips Nv | PROCEDURE FOR MANUFACTURING A COLOR IMAGE TUBE AND COLOR IMAGE TUBE MADE IN ACCORDANCE WITH THAT PROCESS. |
| JPH0339969U (en) * | 1989-08-30 | 1991-04-17 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2007380A (en) * | 1932-11-30 | 1935-07-09 | Rca Corp | Cathode ray apparatus |
| US2114841A (en) * | 1936-04-16 | 1938-04-19 | Westinghouse Electric & Mfg Co | Regulating system |
| US2228821A (en) * | 1938-10-01 | 1941-01-14 | Gen Electric | Magnetic sweep coil circuit |
| US2279849A (en) * | 1940-05-16 | 1942-04-14 | Gen Electric | Control of electromagnetic devices |
| US3153174A (en) * | 1961-01-27 | 1964-10-13 | Westinghouse Electric Corp | Television width linearity control |
-
1964
- 1964-02-12 NL NL646401167A patent/NL140650B/en unknown
-
1965
- 1965-01-28 CH CH123365A patent/CH415741A/en unknown
- 1965-01-30 DE DEN26146A patent/DE1274744B/en not_active Withdrawn
- 1965-02-01 BE BE659100D patent/BE659100A/xx unknown
- 1965-02-02 GB GB4537/65A patent/GB1048452A/en not_active Expired
- 1965-02-09 US US431395A patent/US3456149A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4095143A (en) * | 1976-07-21 | 1978-06-13 | Gte Sylvania Incorporated | Electron beam crossover correction circuitry |
Also Published As
| Publication number | Publication date |
|---|---|
| BE659100A (en) | 1965-05-28 |
| NL6401167A (en) | 1965-08-13 |
| US3456149A (en) | 1969-07-15 |
| NL140650B (en) | 1973-12-17 |
| CH415741A (en) | 1966-06-30 |
| DE1274744B (en) | 1968-08-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2438359A (en) | Television receiver circuits and apparatus | |
| US2241762A (en) | Thermionic valve circuit, particularly for use in television | |
| GB1048452A (en) | Improvements in or relating to magnetic deflecting means for cathode-ray tubes | |
| ES316908A1 (en) | A catodic ray tube exploration apparatus. (Machine-translation by Google Translate, not legally binding) | |
| GB1110926A (en) | Device for demagnetizing television picture tubes | |
| GB786988A (en) | Improvements in or relating to electron tube arrangements including magnetic focussing systems | |
| US3434001A (en) | Television linearity control means | |
| GB1095915A (en) | Improvements in or relating to flowmeters | |
| GB1511677A (en) | Deflection unit for colour television | |
| ES318963A1 (en) | A disposal of circuit to correct the distortion of the paddle during the deflection of an electronic beam in an image tube. (Machine-translation by Google Translate, not legally binding) | |
| GB774401A (en) | Improvements in or relating to magnetic scanning circuits for cathode-ray tubes and the like | |
| GB1122667A (en) | Raster distortion correction apparatus for cathode-ray devices | |
| FI46667C (en) | Coupling device for producing a periodic sawtooth current in a coil, in particular the deflection winding in a television picture tube. | |
| US2485569A (en) | Method of and apparatus for compensating for residual magnetization in cathode-ray apparatus | |
| GB836583A (en) | Improvements in or relating to automatic signalling systems | |
| GB729918A (en) | Improvements in or relating to magnetic deflecting means for cathode ray tubes | |
| GB770133A (en) | Improvements in or relating to permanent magnets | |
| ES318075A1 (en) | An electronic ray convergence apparatus. (Machine-translation by Google Translate, not legally binding) | |
| GB775467A (en) | Improvements in or relating to cathode ray tube apparatus | |
| GB922532A (en) | Magnetic focusing systems for travelling-wave tubes | |
| GB977465A (en) | Improvements relating to arrangements comprising magnetic deflecting assemblies for cathode-ray tubes | |
| US3780338A (en) | Deflection system for color-television tube | |
| GB791039A (en) | Improvements in or relating to deflecting-coil systems for cathode-ray tubes | |
| CA678519A (en) | Magnetic correctors for cathode ray tube images | |
| GB867281A (en) | Improvements in or relating to deflection systems for cathode ray tubes |