Abstract: A multipole electromagnet for injecting particles, including a hollow duct extending along a longitudinal axis, and a plurality of wire conductors that are placed parallel or substantially parallel to the longitudinal axis along the duct, electrically connected in series and arranged to conduct electric current. The directions of the electric current flowing through the wire conductors are symmetric about a first plane of symmetry. The wire conductors are distributed in multiple carrier planes that are parallel or substantially parallel to the first plane of symmetry, including two main carrier planes that are symmetric about the first plane of symmetry and located outside the hollow, each main carrier plane carrying wire conductors that conduct the electric current in the first direction and wire conductors that conduct the electric current in the second direction opposite the first direction.

Abstract: A computer-implemented method is provided for at least partially suppressing an electromagnetic field emitted by a magnetic resonance device during an examination. The method includes measuring a signature of the emitted electromagnetic field using a sensor facility; providing a reference field profile, the reference field profile characterizing an electromagnetic reference field produced by the magnetic resonance device; adapting the reference field profile to the measured signature; and suppressing the emitted electromagnetic field based upon the adapted reference field profile.

Abstract: To provide a magnetic field control apparatus capable of reducing a width of a correcting plate. The magnetic field control apparatus includes a conductive vacuum duct 1 disposed between dipole magnet magnetic poles 3 and a conductive correcting plate 2. The correcting plate 2 is formed of a material having an electric conductivity higher than that of the vacuum duct 1. A plurality of conductive correcting plates 2 are disposed in each of four areas, the four areas being formed by dividing a cross section of a vacuum duct 1 extending perpendicularly to a direction in which a charged particle beam travels by a symmetrical surface having each of both magnetic poles of the dipole magnet defined as a mirror image and a plane which extends perpendicularly to the symmetrical surface and through which a center of gravity of the charged particle beam passes.

Abstract: In the vicinity of an end on the side of a large diameter portion of a deflection device, a pair of first permanent magnets for converging three electron beams in an X-axis direction and a pair of second permanent magnets for diverging them in the X-axis direction are provided. Inclination coefficients KTBH and KEWH of the distribution curve near the Z axis on the X axis of the Y-axis direction magnetic flux density of the magnetic fields respectively formed by the pair of first permanent magnets and the pair of second permanent magnets satisfy KTBH/KEWH<10 in at least one location within a range of 3 to 13 mm on the side of the phosphor screen with respect to a reference line in the Z-axis direction.

Abstract: A deflection yoke mounted on a rear portion of a cathode ray tube (CRT) to deflect an electron beam emitted from an electron gun of the CRT includes a coil separator mounted on the CRT, a horizontal deflection coil mounted on an inside of the coil separator, having a first section generating a horizontal deflection magnetic field deflecting the electron in a horizontal direction and having a first radius, having a second section generating a magnetic field to weaken the horizontal deflection magnetic field and having a second radius different from the first radius, a vertical deflection coil mounted on an outside of the coil separator and generating a vertical deflection magnetic field deflecting the electron beam in a vertical direction, and a ferrite core covering a portion of the vertical deflection coil to strengthen the horizontal deflection magnetic field and the vertical deflection magnetic field.

Abstract: A deflecting yoke core with which magnetic saturation is prevented by optimizing the relationship between the core sectional area and the density of the magnetic flux distribution. The deflecting yoke core to be mounted between a neck and a funnel of a cathode ray tube has a hole 2 extending from an opening end of a neck portion 3 to an opening end of a funnel portion 1. The hole 2 at the funnel portion 1 widens toward the opening end of the funnel portion 1. An outer shape at the opening end of the funnel portion 1 has a short diameter Dx1 along a minor axis X and a long diameter Dy1 along a major axis Y. Core sectional areas along a plane parallel to and passing through a core axis O1 are largest within an angular range of 30° to 65° measured around the core axis O1 from a 0° reference angle at the minor axis X.

Abstract: A deflection yoke having a capability of correcting a lateral inner pincushion distortion with a magnetic field generated by a deflecting coil itself is provided. The deflection yoke includes a saddle-type vertical deflecting coil including a screen side bend portion, a neck side bend portion and a cone portion connecting the screen side bend portion and the neck side bend portion and is installed to a cathode ray tube. When viewing the screen side bend portion of the vertical deflecting coil from a screen side of the cathode ray tube in a direction along the tube axis, a distance between the screen side bend portion and the tube axis is the minimum at a portion close to a diagonal direction of the screen. As a result, the lateral inner pincushion distortion can be corrected with a magnetic field generated by the deflecting coil itself with a simple configuration, without adding any component for correcting the distortion and increasing a deflecting power.

Abstract: The present invention relates to a deflection unit for mounting on an in-line type cathode ray tube comprising a coil body including grooves for receiving wound coil wires, the grooves extending substantially in a straight line. The groove extension of at least one groove is changed at at least one location such that the coil wires received in the groove become curved in the area of the changed groove extension. In a preferred embodiment the grooves are separated from each other by groove walls which in the area of the changed groove extension comprise a thickening and optionally a bulge. The coil wires wound onto the coil body form the horizontal coil or the vertical coil. The arrangement serves the selective fine adjustment of the deflection fields for eliminating convergence, coma and/or geometry errors.

Abstract: The present invention refers to a deflection unit for mounting on a color cathode ray tube, an associated tube and a corresponding display apparatus. The deflection unit comprises a pair of coils for vertical deflection and a pair of coils for horizontal deflection. At least one of the pair of coils is subdivided into at least two parts, of which one part is intended for the correction of convergence errors and the other part for the correction of geometry errors. The respective corrections can be carried out independently of the respectively other correction. According to a preferred embodiment the parts are spatially separated and mechanically independent, with the part intended for geometry error correction being positioned closer to the screen of the picture tube. Preferred is the use of an in-line type arrangement of the saddle-saddle or saddle-toroidal type.

Abstract: A deflection yoke for CRTs, designed to easily correct a misconvergence in a vertical direction of a frame without being rotated during a frame correction step, is disclosed. The deflection yoke has a coil separator composed of a screen part, a rear cover part and a neck part. A plurality of horizontal and vertical deflection coils are set on the internal and external surfaces of the coil separator and generate horizontal and vertical deflection magnetic fields. A correction means is provided on the rear cover part of the coil separator and corrects the vertical magnetic field in addition to frame dispersion. A position adjusting means is provided at a position between the rear cover part and the correction means and holds the correction means on the rear cover part while allowing the position of the correction means relative to the rear cover part to be finely and precisely adjustable. This deflection yoke precisely and stably corrects both the frame dispersion and the vertical magnetic field.

Abstract: Temperature compensation for a magnetic sector used in mass spectrometry. A high temperature dependant magnetic sector is used. This magnetic sector is compensated by a magnetic shunt that has opposite temperature characteristics to those of the magnet.

Abstract: A device for shielding the earth magnetic field permeating through a neck of a cathode ray tube (CRT) to improve purity, raster and convergence characteristics in the CRT. The device for shielding the earth magnetic field according to the present invention includes a tube type shielding device, the device made of a material having a high magnetic permeability and low coercive force, and the device having four evenly spaced extension parts formed on the periphery thereof along the CRT axis. The device is made of a Ni—Fe permalloy including Ni of more than 50 weight %, preferably about 78.5 weight %. The device has an inner diameter capable of mounting on the outer surface of the neck. Alternatively, the device may be mounted on the neck by means of a both-sided adhesive tape. The device may be also securely mounted on the neck by means of a thermal contraction tube.

Abstract: An electron beam deflection device for a cathode ray tube in which the power for deflecting an electron beam may be reduced easily and convergence may be adjusted easily. The electron beam deflection device has a horizontal deflection yoke and a vertical deflection yoke which are arranged at different positions relative to each other in the fore-and-aft direction. A first core constituting the horizontal deflection yoke is of a flat annular shape. The upper and lower inner surfaces of the first core operate as opposing magnetic poles. A second core constituting the vertical deflection yoke may be of a flat annular shape or of a circular or square annular shape. The forward or rear end of the first core or the forward or rear end of the second core is provided with a cut-out for adjusting the convergence.

Abstract: A cathode ray tube including an electron gun including a cathode and a plurality of electrodes and for generating an electron beam, a phosphor screen and an electron beam deflection device. The cathode ray tube includes a deflection-defocusing correcting member having laminated nonmagnetic and magnetic materials disposed in a deflection magnetic field produced by the electron beam deflection device for establishing at least one non-uniform magnetic field. The magnetic materials are disposed at positions with respect to a path of the electron beam where a magnetic flux density of said deflection magnetic field is more than five per cent of a maximum magnetic flux density of the deflection magnetic field.

Abstract: In a deflection yoke employing a saddle-shaped deflection coil of a bobbin-winding type, a fusion layer for fusing at least those wires of the coil disposed in proximity to each other is provided in each bent portion of the deflection yoke, whereby occurrence of corona at the bent portions can be effectively prevented.

Abstract: A color CRT including an envelope having a tube axis (Z) and including panel (21) having an inner surface on which a phosphor screen (23) is formed, a funnel (22) connected to the panel (21) and neck (25) connected to the funnel (22), an electron gun assembly (40) arranged in the neck (25) for emitting three in-line electron beams toward the phosphor screen (23), convergence magnetic structure (32) arranged outside of the neck (25) for generating a hexapole magnetic field in the neck (25), a first pair of magnetic members (33A, 33B) arranged outside of the neck on a horizontal axis faced to each other with the electron gun interposed therebetween and extending along the axis of the tube; and a second pair of magnetic members (60A, 60B) so arranged in the X-Y plane as to face each other on a Y-axis and elongated along the magnetic structure (32), respectively, the X-axis corresponding to the horizontal axis, the Y-axis corresponding to the vertical axis normal to the tube axis (Z).

Abstract: A deflection yoke for use in a cathode ray tube is disclosed for overcoming a deflection yoke noise problem due to the vibration of a correction projection and simultaneously controlling in an easy manner a local magnetic field adjustment. The deflection yoke includes a net-shaped correction projection for convergence correction formed of a plurality of wires.

Abstract: A cathode ray tube display comprises a cathode ray tube (10) having a screen (11) connected to a neck portion (12) via a bell portion (13). Cancellation coil means (160,160') are arranged to receive a signal based on a scanning signal for the cathode ray tube and arranged to reduce stray magnetic fields radiating from the display. The cancellation coil means comprises a first cancellation coil (160) and a second cancellation coil (160') located on each of opposite sides of the cathode ray tube. The first cancellation coil (160) are located adjacent the bell portion and the second cancellation coil (160') being located adjacent the neck portion. The first and second cancellation coils each being contained in a plane substantially perpendicular to the screen of the cathode ray tube.

Abstract: Disclosed is a supplementary coil of a deflection yoke for a Braun tube. The supplementary coil forms a magnetic field of a pin-cushion type at a screen portion and a magnetic field of a barrel type at a neck portion at the same time. The deflection yoke includes a coil separator for fixing a relative position between horizontal deflection coils and vertical deflection coils by acting as an insulator. The supplementary coil also includes projections formed on inside surfaces of the neck portion and the screen portion of the coil separator. The supplementary coil is wound around the projections in the neck portion in a winding direction identical to a winding direction of the horizontal coil and wound around the projections in the screen portion in a winding direction opposite to the winding direction of the horizontal coil.

Abstract: A multi-cathode electron beam plasma etcher is disclosed. The multi-cathode electron beam plasma etcher is comprised of: a vacuum chamber; several cathodes which are installed in the upper end of the upper part of the chamber and generates an electron beam in order to generate plasma in a large area; an acceleration electrode and a deceleration electrode which, form an acceleration and a deceleration tube structure in order to withdraw much of the electron beam, are arranged sequentially from the front of the cathode, and form an electrostatic lens when the differential voltage is applied respectively; first vacuum evacuation device to made the upper part of the chamber vacuum; an etching gas injection device which is installed in the side wall around the upper end of the lower part of the chamber; second vacuum evacuation device which is installed in the lower part of the chamber; and a holder of the etched body which is installed in the lower part of the chamber.

Abstract: A deflection yoke device includes vertical deflection coils wound on a pair of cores, respectively, and a pair of horizontal deflection coils each having two longitudinal portions connected to a larger arcuate interconnecting portion and a smaller arcuate interconnecting portion, respectively. The smaller arcuate interconnecting portion is connected generally perpendicularly to the longitudinal portions, respectively, and the larger arcuate interconnecting portion is connected at an acute angle to the longitudinal portions, respectively.

Abstract: A deflection yoke having upper and lower magnets located at upper and lower positions of the funnel side of a cathode-ray-tube, for correcting upper and lower pin-cushion distortions. The upper and lower magnets are movably held so as to make magnetic fields formed by the magnets variable horizontally or vertically and asymmetrically. Accordingly, asymmetrical image distortion both in a vertical direction and a horizontal direction can be easily corrected.

Abstract: A ferrite core for a deflection yoke of a CRT includes concave and convex portions for correcting a raster distortion of the deflection yoke by varying a magnetic path at one end of a screen portion of the ferrite core. The ferrite core may be incorporated in a deflection yoke that includes a horizontal deflection coil for deflecting electron beams emitted from an electron gun in the horizontal direction, a vertical deflection coil for deflecting the electron beams in the vertical direction, and a holder for fixing the horizontal deflection coil and the vertical deflection coil to given positions and separating them from each other. The ferrite core also prevents a magnetic force caused by the horizontal and vertical deflection coils from being reduced.

Abstract: A device for correction of negative differential coma error in convergence free deflection yokes. The deflection yoke encloses a portion of a cathode ray tube, including a portion of the cathode ray tube neck, and includes: a separator around which is wound a horizontal deflection coil for providing a horizontal magnetic deflection field; a core around which is wound a vertical deflection coil for providing a vertical magnetic deflection field, the core partially encircling the separator; and a rear cover which attaches the deflection yoke to the cathode ray tube, the rear cover being disposed around the neck of the cathode ray tube and having a first side facing the direction of the screen of the cathode ray tube and resting against a rear end of the separator.

Abstract: A magnet assembly for a CRT, installed in the outer periphery of a neck portion incorporating an electron gun for emitting R, G and B electron beams for converging the electron beams on the center of a screen is disclosed. The magnet assembly includes a magnet support inserted into the outer periphery of the neck portion, a pair of two-, four- and six-pole magnet rings rotatably installed in the outer periphery of the magnet support, spacers inserted between the each pair of magnet rings, and a magnet fixing means rotatably coupled in the outer periphery of the magnet support for fixing the magnet support on the neck portion and preventing the magnet rings and the spacer from being fluctuated on the magnet support.

Abstract: There is provided a picture distortion correcting apparatus for correcting substantially improves a magnetic field correcting effect in which a special picture distortion corrected even when the same magnet volume as a conventional magnet is used. Rod-shaped magnets for correcting picture distortion are attached on the outside of a cathode ray tube corresponding to the upper and lower screen portions. Both the magnetic poles of the rod-shaped magnets 26 and 28 are bent toward the tube axis of the cathode ray tube. The transverse cross section of the rod-shaped magnet may have an inverse U shape. By making both the magnetic poles bent toward the tube axis of the cathode ray tube, the magnetic field correcting effect is improved, and a special picture distortion can be corrected effectively without making the magnet larger and without using a plurality of magnets.

Abstract: An apparatus for displaying video images. A video image display apparatus including a cathode ray tube device for producing a plurality of electron beams each corresponding to a respective color and, in response to a magnetic field, for converging the electron beams onto a screen of the cathode ray tube device so as to cause video images corresponding to the converged electron beams to be displayed thereon. The apparatus further includes a deflection yoke device for producing the magnetic field. The deflection yoke device is arranged such that an inner surface thereof is adjacent to an outer surface of the cathode ray tube device.

Abstract: A magnetic focusing system has a pair of disc-shaped pole pieces between which several permanent rod magnets are mounted, their north poles in contact with one pole piece and their south poles in contact with the other pole piece. The permanent rod magnets are equally spaced around the outer perimeters of the pole pieces, and are separated from one another so that they do not create a ring. The pole pieces have central holes, between the rims of which a symmetric magnetic lens is formed for focusing an electron beam.

Abstract: A method and apparatus for correcting harmonics (multipoles) in high energy particle accelerators using superconducting magnets using corrector rods adjacent to accelerator magnets. In such accelerators, superconducting coils are positioned around a non-magnetic beam tube with the magnetic coils designed to guide particles, such as protons, along the tube. Magnetic field non-uniformites in the form of multipoles (harmonics) will disrupt the beam guidance, causing particles to hit the tube walls and be lost, reducing accelerator efficiency. The negative effects of multipoles (harmonics) in such accelerators can be reduced or eliminated by positioning a selected number of pairs of carefully sized and dimensioned rods of magnetic material such as nickel or iron along the exterior of the beam tube or enclosing helium vessel near the magnet ends. The rods are equally spaced and lie parallel to the beam tube axis.

Abstract: Display tube including a deflection unit which comprises a coil support (8), a field deflection coil (12), a line deflection coil (11) and a yoke ring (14). Plate-shaped metal field correction elements (15, 15', 15") are arranged between the field deflection coil (12) and the coil support (8), which elements are rigidly secured to the inner surface of the yoke ring by means of a form-filling adhesive which extends between the parts of the field deflection coil. Vibrations of the field correction elements and sound generated by transfer of these vibrations to the coil support are thereby substantially prevented.

Abstract: A stray magnetic field suppression system for use in a CRT image display suppresses a stray magnetic field that emanates from the horizontal deflection coil of a beam-deflecting yoke which is energized by sawtooth waveform pulses from a horizontal oscillator. The system comprises two series-connected magnetic coil assemblies in conjunction with a capacitor and activated by the sawtooth waveform pulses. The capacitor serves to integrate the pulses, enabling the suppression system to form an effective field for suppressing a stray magnetic field when the magnetic coil assemblies are interposed in the path of the stray magnetic field on opposite sides of the yoke.

Abstract: An improved cathode ray tube yoke assembly and cathode ray tube system is capable of reducing or eliminating cathode ray tube geometrical image distortions caused by an inherent non-linear relationship between magnetic deflection fields inside the tube and electron beam spot deflection. The yoke assembly comprises horizontal and vertical windings for producing horizontal and vertical deflection fields and one or more non-linear magnetic elements. The magnetic elements produce a non-linear relationship between driving currents and magnetic deflection fields inside the tube which substantially compensates for the inherent non-linear relationship between deflection fields and electron beam spot deflection. In the preferred embodiment, the inductances of the yoke windings remain constant during operation.

Abstract: The invention relates to a magnet configuration with permanent magnets (5, 6) around a yoke (2, 3, 4) connecting these permanent magnets (5, 6). The magnetic field strength of this magnet configuration is varied thereby that in the region of the yoke (2, 3, 4) at least one rotatable body (8) is provided which comprises at least two spatially separated materials (9, 10) with different magnetic properties.

Abstract: A display tube comprising a deflection unit having a field deflection coil 12 and a line deflection coil 11. Field-guiding elements 17 and 18 are arranged between the field deflection coil 12 and the line deflection coil 11 in such a manner that they produce little or no vibration.

Abstract: In a cathode ray tube, a first pair of permanent magnet pieces are arranged along a horizontal direction and fixed on an end portion of a deflection unit at an electron gun side in such a manner that poles of one of the magnet pieces face the other poles of the other magnet piece. A second pair of permanent magnet pieces are arranged along a vertical direction, separated from the first pair of permanent magnet pieces by being fixed on a neck portion, forward of the electron gun assembly, and in such a manner that poles of one of the, magnet pieces face the other poles of the other magnet piece.

Abstract: The invention relates to an attachment structure of a magnetic piece of a defection yoke to be fixed to the center of a coil separator, and the invention is constructed such that a center protuberance 3 is formed by protruding at the center of a supporting base 2 of a coil separator 1, and a pair of opposed side protuberances 6 or a pair of opposed guiding member 8 provided with a guiding groove 7 which are made to support the right and left side surfaces of the magnetic piece 4 are integrally formed at the right and left of the center protuberance 3 whereby the shaking of the magnetic piece 4 is prevented, so that a misconvergence of the screen of a CRT tube can be effectively compensated.

Abstract: A deflection yoke device for deflecting an electron beam traveling in the interior of a CRT. The distribution of a magnetic field supplied by horizontal deflection coils to the interior of the CRT forms a barrel magnetic field on the panel side and the neck side, as viewed from the horizontal deflection coils, and a pin magnetic field in an intermediate space therebetween. The deflection yoke device of the invention is provided with a correction coil on the neck side, as viewed from the horizontal deflection coils so as to correct the neck-side magnetic field produced by the horizontal deflection coils into the barrel magnetic field of a greater intensity. The distortion of a beam focus caused by the pin magnetic field is thereby corrected.

Abstract: A conventional pair of magnetic members which conduct a leakage magnetic field from a vertical deflection coil, and which generate an auxiliary magnetic field for correction in a pincushion on the side of an electronic gun of the vertical deflection magnetic field are wound with auxiliary coils, and these auxiliary coils are connected to the vertical deflection coil. In addition to a conventional function of generating an auxiliary magnetic field, the auxiliary coils operate as a function of generating a magnetic field, so that a convergence distortion and spot distortion can be completely corrected without causing any damage.

Abstract: Periodic permanent magnet (PPM) stacks for use in wigglers and traveling e tubes having magnetic cladding. A variable magnetic potential cladding along the adjacent surfaces of working magnets is used, thereby increasing the efficient use of magnetic material and increasing the magnetic field while minimizing weight. The magnetic cladding has a direction of polarity perpendicular to the direction of polarity of the working magnets. Extraneous magnetic fields are also reduced. A magnetic shunt, or soft iron, is used to facilitate the conduction of magnetic flux and create an equal magnetic potential exterior surface.

Abstract: A cladded magnet twister device for a microwave/millimeter wave source is comprised of a plurality of polygonal similarly magnetized magnet segments. Each magnet segment is displaced radially in equal angular segments along the central axis relative to its neighboring segment to provide a transverse helical field and is comprised of a relatively short length of an array of bar magnets, cladding magnets, bucking magnets, pole pieces and corner pieces. The pole pieces are secured to the ends of the bar magnets and have convex faces which are directed inwardly toward one another.

Abstract: Two disc shaped permanent magnets are provided within a yoke structure in a manner to face one another. Two pole pieces are disposed on the surfaces of the two magnets respectively. Small spherical metallic members which induce a localized increase in magnetic field strength, are attached to the surfaces of the opposed pole pieces at selected locations in a manner which unifies the magnetic field produced.

Abstract: A deflection yoke arrangement with geometry correction includes horizontal and vertical deflection coils for scanning a raster pattern on a phosphor screen of a cathode ray tube. A support housing suitable for positioning about the neck of the cathode ray tube contains the coils and has a front rim formed with a plurality of slots near the outer periphery. A plurality of brackets formed from magnetically permeable material are located in corresponding ones of the slots. Each bracket comprises two flat end sections joined to opposite sides of a flat central part at substantially right angles thereto. One of the flat end sections of each bracket collects magnetic flux generated by the coils and channels the flux via the central part to the other end section. The plurality of brackets shape the deflection magnetic field in the region about the front rim to provide the geometry correction.

Abstract: An special arrangement of the magnetic components of a horizontal sweep output circuit to reduce the net flux density and magnetic induction that are present at the exterior of a video display. The special arrangement meets the new, lower VLF electro-magnetic emission standards of some of the European countries, such as Sweden. The method used for obtaining this special arrangement of horizontal sweep output components is also disclosed.

Abstract: A permanent magnet structure comprising a longitudinally extending flux sce fabricated of magnetically rigid material. The flux source comprises a central cavity with a magnetic field being produced therein. Magnetic dipoles having predetermined magnitude and orientation for compensating nonuniformities in the magnetic field are symmetrically located within the plane of the flux source.

Abstract: A deflection yoke is constructed of a truncated conical hollow core, a pair of saddle-shaped horizontal deflection coils disposed inside the core, and a pair of toroidal vertical deflection coils wound on the core or a pair of vertical deflection coils wound in a saddle-like configuration and arranged in the vicinity of the core. A pair of cancellation coils opposing each other on an imaginary axis which passes through a central axis of the core in the direction of vertical deflection are arranged near front end sections of the vertical deflection coils, respectively. A central axis of each of said cancellation coils is inclined at a predetermined angle relative to the central axis of the core. The cancellation coils are connected with the horizontal deflection coils, respectively.

Abstract: Deflection unit for use with a color display tube in which the line deflection coils are of the saddle type and have a front flange which is formed in such a way that a central portion has a part located closest to the axis of the display tube and being parallel to the surface of the display tube and a part located farthest away from the axis of the display tube and being transverse to the axis of the display tube, such that the north-south raster error is reduced.

Abstract: A deflection yoke which includes a vertical deflection coil, a horizontal deflection coil, and a coil separator for supporting the vertical and horizontal deflectors. The deflection yoke further includes a cross arm attached to the coil separator. The cross arm includes a first portion for absorbing magnetic flux leaked from the vertical deflection coil, and a second portion for discharging magnetic flux. The cross arm further includes a first tongue integral with the first portion and extending perpendicularly therefrom. The cross arm still further includes a second tongue which extends from an end portion of the first tongue and along the axial direction of the deflection yoke in order to provide a cross-arm which corrects misconvergence or mislanding at a corner portion of a display screen.

Abstract: A deflection yoke to be used in a color CRT apparatus having an aspherical face panel (30) has a pair of magnetic members (6,7) disposed on an outer surface of a larger diameter part of a cone shaped coil holding frame (11) in symmetry with respect to a vertical plan including center axis of the coil holding frame (11). Each of magnetic member (6,7) has upper and lower magnetic parts (6b,6c) for distorting vertical deflection magnetic field from barrel shape to pincushion shape, and the upper or lower magnetic parts (6b, or 6c) has protruded magnetic parts (6d or 6e), respectively protruded from the upper or lower magnetic parts (6b or 6c) towards screen part of the color CRT apparatus, for partially correction of pincushion distortion of raster at peripheral part of screen.

Abstract: An improved picture sensitivity to the magnetic field produced by a field deflection coil (28) for an in-line gun shadow mask display tube is obtained by positioning magnetic field conducting elements (32, 34) within the envelope of the display tube in the central deflection area of the field produced by the field coil (28). By positioning the magnetic field conducting elements (32, 34) inside the envelope, the distances between the elements (32, 34) and the yoke ring (30) and between the elements (32, 34) and the field coil (28) are such that the unnecessary flux is significantly less compared to a known situation in which these elements are located between the line and field coils, thus improving the field deflection sensitivity.

Abstract: In a deflection yoke for a color cathode-ray tube having an electron gun assembly for generating a plurality of electron beams which are directed longitudinally to converge substantially at the center of a screen, and in which a deflection magnetic field is provided through which the beams pass between the gun assembly and the screen so as to be deflected from the center of the screen for scanning the latter; horizontal center raster (HCR) misconvergence of the beams is avoided by providing a closed circuit in which an induced current is generated in response to a leakage magnetic field from the horizontal deflection magnetic field, and such induced current in the closed circuit generates a compensating magnetic field by which the distribution of the horizontal deflection magnetic field, in the longitudinal direction of the beams passing therethrough, is suitably altered.