Abstract: A cathode ray tube display device which has an arrangement for mounting a deflection unit on the conical portion of a cathode ray tube envelope. In order to permit a rapid mounting of the deflection unit in a manner which provides shock resistance, and resistance temperature fluctuations in the deflection unit and the envelope, three V-shaped, sheet metal connecting devices connect the deflection unit to the conical portion of the envelope. The free ends of the devices are attached to the deflection unit in such a manner that the vertices of the devices are substantially tangential to the surface of the conical portion. After adjustment of the deflection unit the vertices of the devices are secured to the conical portion in such a manner that the connections are loaded with a shearing force.

Abstract: A static convergence assembly includes a collar adapted to encircle the neck of a cathode ray tube (CRT). A number of extensions project radially outwardly from the collar along selected radii of the CRT neck and individually carry elongate stems mounted for longitudinal and rotational movement therealong. A permanent magnet, carried at the end of each stem nearest the CRT neck, develops a beam deflecting magnetic field within the CRT. The rotational and longitudinal position of each stem can be adjusted to adjust the orientation and strength of each magnetic field to alter the deflection of each beam as required to achieve static convergence.

Abstract: Permanent magnet structures in several alternative forms are fabricated f multiplicities of permanent magnet segments of magnetic materials, preferably rare earth compounds, with the segments displaced radially from each other progressively along the structures elongate axes so as to produce a heliform magnetic field extending centrally in a passage through the structure.

Abstract: An electromagnetic deflection-distortion corrector comprises a plurality of permanent magnets arranged around the tubular wall of a CRT display unit of the electromagnetic deflection type, and adjuster means for moving each permanent magnet forward and backward, toward and away from the CRT wall, while at the same time rotating the direction of its magnetization.

Abstract: A convergence device for electron beams in a color picture tube includes a pair of four-pole magnet rings, a pair of six-pole magnet rings and a pair of two-pole magnet rings, the absolute value of the temperature coefficient of magnetization of which is equal to or less than 0.05%/.degree. C. measured in a temperature range of 0.degree. C. to 120.degree. C.

Abstract: In accordance with the invention, to prevent a deflection system for a color picture tube provided with an in-line gun system from causing pincushion distortions in the east-west direction on the screen, at least two plane, thin field formers are provided for on the end face of the core for the vertical deflection coils. These field formers are made from a soft-magnetic material and are substantially in the shape of ring segments.

Abstract: In a video display system in which a cathode ray tube exhibits blue bow misconvergence, a correction arrangement includes areas of magnetizable material located within recesses formed in the deflection yoke insulator. The material lies between the end turns of the horizontal coils along the sides of the yoke. The material is magnetized to form a four-pole field to effect correction of the blue bow error.

Abstract: A raster distortion corrector for a cathode ray tube includes magnetically permeable corrector pieces that are located on opposite sides of the deflection yoke. A part of each corrector piece is located within the external field of the vertical deflection coils and presents a low reluctance path to the external field flux. The flux is directed via a flux channelling arm of each corrector piece to a field shaper that causes a distortion correcting field to be formed between the corrector pieces. The flux channelling arms are formed and located so that there is no significant interaction of the corrector pieces with the horizontal deflection field.

Abstract: A pair of horizontal deflection coils of a deflection yoke comprises a combination of two horizontal coil sections and a current regulator for regulating the horizontal deflection current which flows through the coils is connected across these two horizontal coil sections. The winding sections extending in the direction of the tube axis along the neck of the cathode-ray tube for two horizontal coil sections are formed so that the same distribution of conductor is not provided in the same guadrants which are divided by X and Y axes.

Abstract: Deflection unit (5) in which field-conducting elements (9,10) are provided between the field deflection coil (8) and the line deflection coil (7) so that a good level of astigmatism as well as an acceptably small coma error and a reduced EW frame distortion are obtained. In order to prevent that the field-conducting elements (9,10) from having a detrimental influence on the ten-pole field generated by the field deflection coil (8), each of the said elements is formed as a slightly curved plate having a central portion (15) on which two limbs (17,19) extending substantially transversely to the axis (Z) of the annular member (6) are formed.

Abstract: A plurality of permanent magnets are usually disposed within a cathode ray tube for correcting the magnetic field causing misconvergence or raster distortion of beams travelling within a cathode ray tube. Since the magnets of plate shape are magnetized in the thickness direction thereof being reversed at both the ends thereof along the longitudinal direction thereof, it is possible to effectively distribute magnetic field generated by the permanent magnets within the cathode ray tube without increasing the thickness of the magnets.

Abstract: In a method of manufacturing a color cathode-ray tube comprising a magnetic quadrupole post-focusing mask (7) the mask (7) is formed by a plate of permanent magnetizable material in which apertures (9) are provided arranged according to rows. Sections of the plate are successively magnetized by positioning parallel conductors (21, 22, 23) on at least one side of the plate in such manner that each time two conductors through which an electric current flows in opposite directions are situated between two rows of apertures (9) and a magnetic quadrupole is formed along the circumference of each of the apertures (9). A number of outermost conductors (30, 31, 32, 33) determines an edge area of the section. In order to prevent the occurrence of disturbing magnetization errors in the edge area, the edge area is made to coincide with a part of a preceding section already magnetized according to the desired strength.

Abstract: A method of manufacturing a cathode ray tube in which magnetic poles are provided in or around the neck (4) of the envelope (1) and around the paths of the electron beams extending substantially parallel to the axis (8) of the tube, said poles generating a permanent multipole magnetic field to correct the occurring errors of convergence and color purity and frame defects of the color display tube, which magnetic poles are formed by magnetizing a configuration (17) of magnetizable material which is provided around the paths of the electron beams, which configuration is magnetized by energizing a multipole coil unit (15) by means of a combination of currents with which a static multipole magnetic field is generated and the magnetization is produced by means of a decaying alternating magnetic field which is generated by means of an alternating field coil (16) and which initially drives the magnetizable material on both sides of the hysteresis curve into saturation.

Abstract: In a magnet assembly including a pair of annular shaped magnets mounted on the neck of an in-line electron gun type color picture tube for adjusting the running path of the electron beam, the flux density of one magnet on the inlet side of the electron beam is made to be larger than that of the other magnet on the exit side of the electron beam.

Abstract: Two or more magnetically soft pole pieces are symmetrically positioned along a longitudinal axis to provide a magnetic field within a space defined by the pole pieces. Two or more permanent magnets are mounted to an external magnetically-soft cylindrical sleeve which rotates to bring the permanent magnets into closer coupling with the pole pieces and thereby adjustably control the field strength of the magnetic field produced in the space defined by the pole pieces. The permanent magnets are preferably formed of rare earth cobalt (REC) material which has a high remanent magnetic field and a strong coercive force. The pole pieces and the permanent magnets have corresponding cylindrical surfaces which are positionable with respect to each other to vary the coupling therebetween. Auxiliary permanent magnets are provided between the pole pieces to provide additional magnetic flux to the magnetic field without saturating the pole pieces.

Abstract: A segmented permanent ring magnet which is tunable to provide a preselected transverse magnetic field within the magnet interior is disclosed. The permanent magnet is constructed of material which has essentially linear behavior in the second quadrant of the B-H curve. The invention includes a method of tuning a segmented permanent ring magnet and a method of manufacture for the blocks of magnetic material which make up the magnet. The magnets of the present invention are particularly adapted for use as bias magnets in NMR imaging systems.

Abstract: A deviator associated with an autoconvergent color image tube is modified so that it may be used in combination with a tube of the same type, but having an image screen of smaller size, the horizontal and/or vertical deviation center being displaced. According to the invention, a magnetic screen is placed across the magnetic field lines produced by the vertical and horizontal deviation coils whereby the deviation centers are displaced without any modification of the coils.

Abstract: An electromagnetic deflection unit has a conical coil holder with a flange which carries coils for the horizontal deflection of electron beams. The coils have segments extending substantially in the longitudinal direction of the coil holder and near these segments are arranged soft-magnetic members on the inwardly directed side of the coils in order to influence the magnetic field of these coils and hence to reduce convergence errors. The soft-magnetic members are incorporated, in a configuration suitable for the relevant type of deflection unit, in a moulded annular body of synthetic material.

Abstract: A device for displaying television pictures having a deflection unit which is placed on a display tube and which comprises a line deflection coil system and a field deflection coil system, both with coils of the saddle type. At the gun end the field deflection coil system has two diametrically oppositely located `V` shaped members of a soft magnetic material, the limbs of which extend towards the neck of the display tube while the arcuate transverse portion of each `V` member bridges corresponding parts of adjacent longitudinal winding packets of the field deflection coil at the gun end of the deflection unit.

Abstract: The invention concerns a process and a device ensuring the fixation on the neck of a cathode tube of the deflection yoke of the tube. According to the invention, the deflection yoke 3 is fixed after its positioning has been determined between a fixed abutment 9 which may be adjustable in position and an elastic abutment 6 which presses the yoke 3 against the abutment 9. The invention applies especially to tubes adapted to be fitted to color television receiver appliances.

Abstract: An electron beam convergence device is provided for a cathode ray tube of the type including an electron beam gun for developing three electron beams disposed on the screen in linear array. First and second rods formed of magnetic material and each including a plurality of pole pairs disposed along the rod are tangentially positioned on opposite sides of the neck of the cathode ray tube, with both axial (i.e., linear) and rotatable motion of the first and second rods being permitted with respect to the cathode ray tube. Axial and rotatable motion of the first rod are operable to adjust the left beam without substantial movement of the center and right beams. Axial and rotatable motion of the second rod are operable to adjust the right beam without substantial movement of the left and center beams.

Abstract: A permanent magnet used in conjunction with electron beam correction is disclosed which is disk-shaped and exhibits in the plane of the disk an asymmetric quadrapole magnetic field. The strength of the magnetic field between any two adjacent poles is proportional to the distance between the two poles giving four magnetic fields of differing strength in view of the differing distances between the four magnetic poles around the periphery of the disk. A plurality of such magnets can be supported adjacent the envelope of a cathode ray tube to achieve electron beam centering, multiple beam convergence, and the like.

Abstract: A color purity adjustment assembly for color cathode ray tube indicators of the shadow mask type wherein the two ring magnets surrounding the tube neck for determining the magnitude and direction of the resultant magnetic field across the neck are manually angularly adjustable about the tube neck in the same or opposite directions by means of a differential gearing arrangement coupled therebetween.

Abstract: A magnetic compensation device is disclosed for use with a cathode ray tube which includes a strip having a plurality of holes distributed linearly along the strip. A plurality of fasteners, each fastener comprising a base and a shaft substantially perpendicular to the base, passes through a selected one of the holes in the supporting strip. At least one of the fasteners engages two holes in opposite ends of the strip to hold the strip in a hoop shape. The strip is adhesively secured to a deflection yoke. A plurality of ring-shaped magnets are provided with one such magnet being received on the shaft of selected fasteners. The washer-shaped permanent magnets are positioned about the deflection yoke at equal angles with the axis of rotation of the magnets lying in planes transverse to the central axis of the cathode ray tube.

Abstract: A saturable reactor having a pair of series coils is attached to the outside surface of the cores of the vertical deflecting coils where the series coils are connected in series with a parallel connection of the horizontal deflecting coils. Each of the pair of coils of the saturable reactor is wound around a drum core which is magnetically biased by means of a permanent magnet. The saturable reactor is positioned so that leakage flux from the vertical deflecting coils is led into the drum cores, thereby changing the inductance of the pair of coils in accordance with the degree of vertical deflection. The horizontal deflecting currents flowing through the horizontal deflecting coils thus controlled to chage the width of raster providing a trapezoidal raster which is needed for projecting a TV picture on a large screen.

Abstract: In a television deflection device which is mounted on a color cathode ray tube, a frustoconical supporting member (3) has a pair of coil halves (6) and (7) which form horizontal deflection coils halves. These coils have longitudinal portions (11, 12, 14 and 15) which extend to the front and the rear of the supporting member (3), an elongate tapered spacer (17) and (18) being inserted in the spaces between adjacent longitudinal portions of these coils. Movements of the spacers (17) and (18) adjust the space between the longitudinal portions which provides mechanical means for correcting for asymmetries in the display device.

Abstract: A method for producing various configurations of permanent magnet quadrupoles so that there is no coupling in the two transverse directions when focusing a charged particle beam is provided. Each configuration comprises a plurality of rotatable quadrupole disks, and means for rotating the quadrupole disks with respect to each other in a predetermined relationship.

Abstract: A convergence unit for an in-line color cathode ray tube consists of four E-cores located around the neck of the CRT. Each E-core, preferably consisting of strip-shaped soft-magnetic material such as mumetal or permalloy, carries two coils connected so that the net magnetic field at the central beam is zero. The E-cores are arranged in paris with the resultant fields at the nearer electron beam due to each individual E-core being substantially orthogonal to one another.

Abstract: A color display tube having three electron guns situated in one plane for emitting three electron beams towards a display screen and having a deflection device which is mounted around a neck portion of the display tube and has a deflection yoke comprising: an annular core of a magnetizable material on which a field deflection coil toroidally is wound in such manner that its turns are located in planes passing through the longitudinal axis of the annular core. A dipolar field is generated in combination with a sixpole field resulting in a pin-cushion shaped overall field. To change the field at the rear end from the core from pin-cushion to barrel shape on the inside of the rear end of the annular core members of a magnetically permeable material are provided symmetrically with respect to the axis of the field deflection field.

Abstract: A color television display system handling and adjustment apparatus provides a means for maintaining accurate alignment between the base of a kinescope and an energization socket. The kinescope location within the apparatus is referenced to the kinescope front panel contour so that transverse movement of the kinescope does not cause significant movement of the kinescope base. The apparatus also provides means for simulating convergence adjustment of yokes constructed for front and rear tilt convergence adjustment.

Abstract: If in a device for displaying colored pictures comprising a color display tube of the "in-line" type, which comprises magnetized means for maintaining a static magnetic multipole magnetic field near the output of the electron gun system for carrying out static beam corrections, a correction magnet is provided outside the neck near the output of the electron gun system and near at least one outermost electron beam, which magnet forms a magnetic dipole and is intersected by the said plane and which correction magnet is small with respect to its distance to said electron beam, it is possible afterwards to provide small corrections in the horizontal static convergence.

Abstract: A compensator for CRT deflection yokes and the like comprises a housing shaped for connection with the deflection yoke, and at least one magnet rotatably mounted therein. Selective rotation of the magnet alters the electromagnetic field produced by the deflection yoke to alleviate distortion in the CRT display. A detented spring arrangement positively and releasably retains the magnet in a set, adjusted angular position in the housing.

Abstract: The stringent requirements regarding convergence (in color display tubes) and spot quality in monochrome display tubes are met by deflection units which produce dynamic multi-pole fields which are strongly modulated. Static multipole fields, which have a dynamic component when an electron beam passes therethrough, are used in cathode ray tube-deflection unit combinations to simulate, a strong modulation of the dynamic multipole deflection fields. In one combination, the production of a negative static eightpole field in the center of the deflection area improves spot quality.

Abstract: A variable magnetically biased coil assembly for providing a linear display on the screen of a cathode ray tube.

Abstract: A strip or sheath-type beam bender providing purity and static convergence correction for an in-line color kinescope further includes a pair of oppositely polarized magnetic regions or zones on opposite sides of the kinescope neck and aligned with a plane passing through the horizontal beam axis in order to provide vertical beam movement. In order to conserve material, the beam movement zones may be located between purity correcting magnetized zones in the same longitudinal plane of the beam bender.

Abstract: A deflection yoke adjustment apparatus for adjusting a yoke on a kinescope comprises independent coil holders for supporting the horizontal and vertical deflection coils of the yoke. Six elongated positioning rods are attached to particular locations on each coil holder. Actuators, for example stepping motors, move selected ones of the rods to cause translation of the coil holders along a vertical, horizontal or longitudinal axis, or rotation of the coil holder about any of the aforementioned axes. The vertical and horizontal coils may be moved independently to provide an optimum kinescope display. The apparatus also comprises coil alignment devices associated with each positioning rod to maintain coil orientation during movement and force limiting means to protect the kinescope against damage during coil movement.

Abstract: Apparatus for magnetizing circular permanent magnet convergence rings used in kinescopes comprises a number of separate coils wound in composite fashion on one or more pole pieces of a magnetizing device which surrounds the convergence ring, selected groups of these coils being connected with individual magnetizing and demagnetizing circuits chosen to impart a complex multi-polar magnetization to a convergence ring by simultaneous actuation of these circuits.

Abstract: A mounting apparatus for use with a television deflection yoke adapted for transverse adjustment on a kinescope comprises an insulator adapted to be fixedly mounted on the neck of the kinescope at the rear of the insulator. The insulator receives horizontal and vertical deflection coils, and a magnetically permeable core, to form a deflection yoke. A plurality of yoke position orientation and fixing means are mounted to the front of the insulator. The position orientation and fixing means each comprise a guide means incorporating a first engagement means. A member, incorporating second engagement means, is slidably disposed within the guide means. The first and second engagement means cooperate to allow the deflection yoke to be securely held in its adjusted position when the sliding member of each orientation and fixing means is in abutment with the kinescope.

Abstract: A magnetic beam adjusting arrangement for use in adjusting static convergence in an in-line, tri-beam, cathode ray tube includes first and second U-shaped magnet elements, each rotatably and radially movably mounted on a neck section of the cathode ray tube. Each magnet element is polarized with three or five poles for adjusting the convergence of the beams at outer beam paths of a trio of in-line beams paths.

Abstract: A barium ferrite layer is disposed around an external surface of neck portion of a color cathode ray tube to have a magnetic easy axis radially of the longitudinal axis of the neck portion. An electromagnet is revolved around the layer to magnetically charge it so as to correct static convergence and color purity of three electron beams generated in the color cathode ray tube.

Abstract: A yoke mounting assembly provides easy yoke adjustment along the axial direction of the tube with accurate, fixed positioning in the other two dimensions. An extruded sliding support is movable along projections in a housing frame against the applied normal force of a pair of C-shaped retainer springs, the latter being easily rotated to a release position for yoke or camera tube access.

Abstract: A deflection yoke apparatus comprising a yoke which is provided with horizontal and vertical deflection coils, a coil separator disposed between these deflection coils and a deflection core which surrounds the above-mentioned parts, and a convergence device which is attached to a rear part of said yoke and provided with a pair of coil devices which converge electron beams and a cover which supports the coil devices, wherein a pair of coil devices are arranged in a vertical direction intersecting at right angles to the direction of the in-line array of electron beam, the coil devices comprise U-shaped cores and convergence coils which are mounted on the U-shaped cores and supply a fixed amount of vertical deflection current and the U-shaped cores are constructed to be movable in the direction of electron beam to converge electron beams though the convergence coils are fixedly positioned.

Abstract: An electron beam influencing apparatus comprises a deflection yoke which incorporates a kinescope neck-embracing collar which extends from the rear of the yoke. The collar extends over a portion of a slidably mounted sleeve. Permanent magnet neck components are rotationally mounted to the sliding sleeve. The collar and sleeve are formed so that the yoke and collar rotates independently of the sleeve, but longitudinal movement of the yoke and collar will cause longitudinal movement of the sleeve also. A single clamp is used to secure the collar and sleeve to the tube neck. The collar may be attached to a yoke adjustment plate which allows pivotal or transverse yoke motion while maintaining stationary positioning of the adjustment plate.

Abstract: A deflection adjustment device for a television deflection yoke and kinescope comprises a pair of magnetically permeable tabs adapted for linear movement along the kinescope minor axis. Means are provided for translating the rotary motion of a yoke adjustment machine into the desired linear tab travel. The tabs are moved in equal amounts, either toward or away from the yoke axis, to maintain the tabs equidistant from the yoke axis in order to correct coma errors.

Abstract: Means for aligning the electron beam of an electron beam in a cathode ray tube so as to adjust the alignment and which includes a rear bobbin portion surrounding the cathode ray tube and which is mounted at least one cylindrical shaped magnet that is magnetized in the direction of a diameter of the cylinder and which can be rotated so as to correct for misalignment in the tube. In one embodiment, two rotatable magnets mounted at right angles relative to each other are utilized and in the second embodiment a single magnet can be utilized and in which the supporting bobbin in which the magnet is mounted can be rotated by 180.degree. is provided.

Abstract: A deflection yoke for use with a picture tube of a television receiver. A vertical deflection coil of the deflection coil has a larger winding angle on an electron gun side thereof than on a screen side thereof. A magnetic material piece is disposed inside the vertical deflection coil so that a vertical deflection magnetic field is formed into a strong barrel magnetic field on the electron gun side. As a result, a raster scanned on a faceplate of the picture tube is free from misconvergence and pincushion distortion. A core of the deflection yoke has sawtooth-shaped end surfaces, or auxiliary rings having sawtooth-shaped end surfaces are disposed on the end surfaces of the core. As a result, a wire of the vertical deflection coil is prevented from slipping on the end surfaces of the core although the wire of the vertical deflection coil is wound at a large winding angle on the electron gun side.

Abstract: A convergence correction arrangement for a television display system using a deflection yoke mounted coaxially upon the neck of a kinescope includes first and second magnetically permeable tabs contiguous with the beam entrance end of the yoke. The tabs are located on opposite sides of the axis and a fixed separation is maintained between them. A first track constrains the tabs against tangential motion relative to the axis while permitting radial motion. A rotary drive arrangement suited to being engaged by a yoke adjustment machine includes a second track having radial and tangentially-directed components. The second track engages the tabs whereby roatary motion of the rotary drive arrangement drives the convergence-adjusting tabs radially and provides differential motion of the tabs relative to the axis for convergence control.

Abstract: In a plural beam color picture tube, convergence of the beams is achieved by means of non-uniform main deflection fields and of induced flux fields. For this purpose, a pair of supplementary coils are disposed adjacent the toroidally-shaped high permeability magnetic core on which the horizontal windings are turned.

Abstract: An improved color television picture tube static convergence device having a guide-member with bent ledges which slidably mate with circular grooves in sides of non-magnetic rings, the guide-member having a hole for radially positioning a rod with a knob and a pinion which engages mating bevel gears in a conventional magnetic ring pair positioned between the non-magnetic rings.

Abstract: To provide static convergence correction motion to the outer beam of three in-line electron beams of a color cathode ray tube, a magnetized sphere is located adjacent each outer beam. Each sphere is magnetized across a diameter to produce, for example, a two-pole magnetic field for providing the correction motion. The two-poles are separated along a polar axis. Each sphere is located in a housing which permits rotation of the polar axis of the sphere into alignment with the longitudinal axis of the cathode ray tube and permits rotation of the polar axis out of longitudinal alignment in both horizontal and vertical planes.