Abstract: A method for leak detection in a system including a compressor. A first pressure differential is determined in the system via a first pressure differential indicator (PDI). The first pressure differential is converted into a first flow measurement. A second flow measurement is determined downstream of the compressor using a second PDI. The first flow measurement and the second flow measurement are compared to determine whether a leak exists between the first PDI and the second PDI.

Abstract: To provide a circuit board in which a curvature of a display surface can be controlled, or to provide a highly portable circuit board. A circuit board includes a substrate with flexibility and a curvature control mechanism. The curvature control mechanism includes a first electromagnet and a second electromagnet provided over a first surface of the substrate, an insulating film provided over the first and second electromagnets, and wirings electrically connected to the first and second electromagnets.

Abstract: A method is provided for treating a rare earth metal-bearing scrap material by melting an extractant selected from the group consisting of bismuth (Bi) and lead (Pb) and contacting the melted extractant and the scrap material at a temperature and time to recover at least one of the light rare earth metal content and the heavy rare earth metal content as a metallic extractant alloy, which can be subjected to vacuum distillation or sublimation to recover the rare earth metal(s). The method can be practiced to recover the light rare earth metal content and the heavy rare earth metal content concurrently in a one-step process or separately and sequentially in a two-step process.

Abstract: Devices, apparatus, systems and methods for providing accurate linear and angular positioning with a payload mounted to a beam having freely moveable ends. The payload can be a laser pointer mounted on a firearm, which maintains the initial precise pointing during and after exposure in high G shock and vibration environments. Vertical and lateral adjustment controls can adjust minute changes in beam orientation. Precision adjustments can be performed in a zero G, one G, or high G environment and maintains the adjustment during and after being exposed to a high G shock or vibration environment.

Abstract: Provided is a device for magnetizing a ring-shaped magnet for a brushless direct current (BLDC) motor, including: a rotor having a ring-shaped magnet installed on an outer peripheral surface of a rotor core; and a plurality of magnetizing yokes disposed so as to be spaced apart from each other by a predetermined interval while facing an outer peripheral surface of the ring-shaped magnet, magnetizing the ring-shaped magnet to form even-numbered unit magnets, and magnetizing the ring-shaped magnet only in regions except for one end and the other end of the unit magnets.

Abstract: A well conductor strain monitoring system is provided which includes a plurality of fiber optic Bragg grating sensors written onto a single optical fiber. Cable strands are wound around the optical fiber to form an armored cable protecting the fiber. The armored cable is further integrated into a strength cable to provide robustness. This strength cable is then wrapped around the conductor under tension and anchored at both ends. The cable is wound at a prescribed angle so as to have multiple wraps around the conductor. Once tensioned, the cable remains stationary against the conductor and holds a position. The strain gages are spaced along the optical fiber, such that the strain gages are oriented 90 degrees apart when the cable is wrapped about the conductor. This orientation supports the estimation of bending in any direction.

Abstract: The electromagnet support frame is for supporting an electromagnet having a trunnion pair which comprises two trunnions that are formed on mutually opposite side-faces of the electromagnet and whose central axes are matched to each other, and is characterized by including support fixtures whose number is the same as that of the trunnions and in which engaging parts are formed that are engaged with the trunnions so as to cover outer faces thereof, and a mounting frame that holds the support fixtures through vertical adjustment parts that move the fixtures in a vertical direction.

Abstract: An electric motor includes a stator having a core back which varies in width in a circumferential direction, and a rotor provided with permanent magnets. In the electric motor, cogging torque is generated M times during one revolution of the rotor, due to the number of magnetic poles of the rotor and the varied shape of the core back. The core back is provided with a step shift by an angle obtained by multiplying (360/M/2) degrees with an odd number. According to one embodiment, the core back may be provided with holes, concave portions or convex portions, so as to provide the core back with the step shift.

Abstract: Disclosed herein is a magnet assembly that includes at least two magnets arranged in a fixed spaced relationship with one another thereby to define a space between the magnets that encompasses an imaging volume. Each of the magnets produces a variety of magnetic field strengths across inward-facing surfaces thereof that, in combination, produce an acceptably homogeneous magnetic field in the imaging volume. Also disclosed is a method of defining a magnetic field for an imaging volume. The method comprises generating an initial model of a magnet assembly; estimating a magnetic field for the imaging volume based on the model; calculating deviation between the estimated magnetic field and a target magnetic field for the imaging volume; and updating the model to reduce the deviation by modifying the magnet assembly to produce a variety of magnetic field strengths that, in combination, produce substantially the target magnetic field in the imaging volume.

Abstract: An improved beam forming system for ions used in radiation treatment employs a magnet system of successive quadrupole magnets to convert an ion pencil beam to a fan beam with reduced neutrons production compared with conventional beam spreading techniques using scattering foils.

Abstract: The present invention provides the actuator, which is capable of preventing biased abrasion by lowering a surface pressure at a contact portion of a movable element with a guide surface and increasing a movable range, in which a specified output force can be gained. Magnetic resistance of at least one of the surfaces (Y1, Y2) of first and second yoke parts (5, 6) corresponding to peripheral surfaces (P1, P2) of a plunger (7), on which magnetic flux acting surfaces are formed by energization, is unbalanced in the circumferential direction so as to act a resultant force of magnetic forces acting on the movable element in the radial direction eccentrically to a radial one end (E1) side.

Abstract: An inline electromagnetic tool actuator incorporates an actuator housing, an elongated armature, a tool assembly, spaced-apart return magnets, at least one drive magnet, and at least one magnet wire. The elongated armature is located inside the housing, and is adapted for reciprocating linear movement along a notional assembly axis. The tool assembly is operatively attached to the armature. The return magnets are located inside the housing, and are coaxially aligned with the armature. The return magnets have respective inward facing surfaces defining respective magnetic poles. The drive magnet is affixed to the armature, and is arranged between the return magnets. The drive magnet has opposing outward facing surfaces each of like polarity to adjacent inward facing surfaces of the return magnets. The magnet wire is coiled about the armature.

Abstract: An actuator for moving a load has a frame forming a race between two surfaces thereof, at least two elements joined together by at least one flexible member, the elements and the at least one flexible member being disposed between the two surfaces of the frame that forms a race, one of the elements further joined to the load by a portion of the at least one flexible member, wherein when an element comes into contact with a surface of the frame it will stick thereto absent a repelling force, and moving means disposed to selectively attract or repel a corresponding element towards or away from one or the other of the two surfaces of the frame that forms the race. The actuator effects movement of the load in a direction towards or away from the elements, by changing a position of at least one of the elements on a surface of the frame that forms the race.

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 CPU for adjusting color purity and color displacement at the center of a screen is provided on an outer circumferential surface of a neck portion. BVM coils for modulating a scanning velocity in a horizontal direction of electron beams are provided at a position where they are overlapped with the CPU in a tube-axis direction. A ring-shaped ferrite core is provided at a position where it is overlapped with the BVM coils in the tube axis direction. Two surfaces vertical to a tube axis of the ring-shaped ferrite core are covered with resin layers. Because of this, the ring-shaped ferrite core can be prevented from being cracked.

Abstract: The invention is a color cathode-ray tube having a rectangular front face connected to a funnel shaped rear part, a neck connected to the rear part and having an electron gun therein, the gun is used to generate beams intended to scan the front face under the influence of a deflection device placed on the neck of the tube. The deflection device comprising correction magnets placed on the periphery of the device in locations closest to the front face and a magnetic screen within the tube having an opening for passage of the electron beams, wherein the opening has notches in its periphery. The notches are arranged so as to face at least one pair of correction magnets.

Abstract: A cathode ray tube is provided, and more particularly, a cost-effective cathode ray tube effective for minimizing deterioration of color purity and obtaining a sufficient margin for a beam strike neck (BSN) phenomenon by moving a ½ center (deflection center) closer to a panel without changing the curvature of a funnel or the thickness of a glass inside the funnel.

Abstract: The invention relates to a cathode ray tube comprising means (5) for generating an electron beam (6,7,8), means (51) for deflecting the electron beam, and a coil (14′) for influencing a deflection of the electron beam (6,7,8). The coil (14′) comprises an electrically conductive coil holder (46) and coil windings (47,48) having an electrically conductive outer layer (44). The electrically conductive layer (44) of the coil wires (41) and the coil holder (46) cooperate with each other so as to form a conductive path A between successive coil windings (47,48). Due to the outer layer (44) of the wires and the conductive coil holder (46) an electrical path A between successive windings (47,48) is created that provides damping and by which ringing is suppressed.

Abstract: The present invention relates to a cathode ray tube having a deflection yoke including a circular ferrite core and a deflection coil whose cross-section is in a rectangular shape for improving a deflection sensitivity of the cathode-ray tube, and more particularly to a cathode ray tube, in which one part of a vertical deflection coil having a rectangular shaped cross-section to improve a lead-in capability when winding the vertical deflection coil located between a ferrite core and the holder is separated by a predetermined gap from a holder that isolates a horizontal deflection coil and the vertical deflection coil.

Abstract: A deflection yoke of a cathode ray tube apparatus comprises a pair of saddle-type horizontal deflection coils located symmetrically with respect to a central axis and substantially in the shape of a truncated pyramid. A magnetic core substantially in the shape of a truncated cone is located coaxially around the horizontal deflection coils, and a pair of vertical deflection coils are wound on the magnetic core. A relation between a space vf between a large-diameter end portion of the magnetic core and each of the horizontal deflection coils and a space vr between a small-diameter end portion of the magnetic core and each of the horizontal deflection coils, with respect to the direction of a vertical axis perpendicular to the central axis, is given by vf≧vr.

Abstract: A color cathode-ray tube apparatus has a compensation mechanism for generating a magnetic field that compensates a change in a horizontal-deflection magnetic field due to a change in the temperature of horizontal-deflection coils. The compensation mechanism is formed of auxiliary coils to which a current is supplied in synchronism with horizontal deflection of electron beams, and a control element for controlling the current supplied to the auxiliary coils in accordance with a change in the temperature of the horizontal-deflection coils.

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: A method of testing whether a magnetic lifting device may safely lift a particular load where the magnetic lifting device is placed adjacent to the load, some or all of the magnetic elements of the magnetic lifting device are spaced such that the lifting ability of the magnetic lifting device is reduced by a predetermined amount. An attempt is then made to lift the load by a small safe distance. If this attempt is successful, the user can be sure use of the magnetic lifting device, when the lifting ability is restored, is safe. Conveniently, the spacing is achieved by the introduction of a substantially planar member between the magnetic lifting device and the load. The planar member has a similar footprint to that of the magnetic lifting device. The planar member may be made of stainless steel.

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: The invention provides a deflection yoke having two centering magnets mounted thereon for the adjustment of centering. Each of the centering magnets is molded in an annular form from a resin material containing a finely divided magnetic material, the centering magnet having two portions opposed to each other as displaced from each other by 180 degrees about a center axis of the annular form thereof and magnetized to an N pole and an S pole respectively, the content of the magnetic material varying circumferentially of the annular form, the distribution of the content being symmetrical about a straight line orthogonal to a straight line through a center point of the N pole and a center point of the S pole. The magnetic force for the adjustment of centering can be eliminated by the two magnets mounted in combination.

Abstract: A deflection yoke for a Braun tube includes a primary 4-pole convergence yoke adapted to be positioned at a neck portion of a funnel of a Braun tube and a secondary 4-pole convergence yoke positioned in the vicinity of the funnel where horizontal and vertical deflection coils and a ferrite core are installed, for correcting a misconvergence generated due to the primary 4-pole convergence yoke, wherein at least one of the vertical and the horizontal deflection coils is wound at a first holder, and the secondary 4-pole convergence yoke is installed as an auxiliary coil wound on at least one side of the inner side or the outer side of the first holder. With this construction, occurrence of an inverse-magnetic field due to an induced magnetic field is prevented and thus a misconvergence can be easily corrected.

Abstract: A depression in the windings of a horizontal coil at a predetermined location in a deflection yoke of a cathode ray tube corrects for multiple types of mis-convergence. In particular, the depression in the windings is disposed in a “neck” portion of the deflection yoke, which incorporates a horizontal deflection coil disposed on a saddle type mold die. A deflection yoke for deflecting electron beams of a color CRT includes a horizontal deflection coil disposed on a saddle type mold die that has a funnel section and a neck section connected along a horizontal axis parallel to the centerline of the deflection yoke. A portion of the neck section of the deflection yoke includes an offset relative to the profile (relative to the horizontal axis) of the windings of the horizontal coil that creates a depressed area in the windings of the horizontal deflection coil.

Abstract: A deflection yoke for a cathode ray tube comprises a funnel shaped separator means 1a, 1b having a cylindrical neck portion 3 where a magnetic ring is attached. The magnetic ring is engaged with upward holding portions 33a, 33b and with downward holding portions 32a, 32b, which hold such magnetic ring. Root portions 33a3 and 33b3 of the downward holding portions 32a and 32b are substantially inflexible, where the inner circumference of the magnetic ring substantially contacts the root portions 33a3 and 33b3, and the root portions 33a3 and 33b3 restrict the position of magnetic ring from being disengaged from the protrusions 33a1 and 33b1 when the downward holding portions 33a and 33b are forced to disengage the magnetic ring.

Abstract: Disclosed a color purity and convergence magnet (PCM) for a color cathode ray tube capable of fine-adjusting irrespective of the position of the axial direction of the tube, reducing the influence of an adjusting magnetic field on an electron gun, and increasing the workability for the color cathode ray tube.

Abstract: A deflection yoke for preventing fluctuation of the deflection yoke by maintaining a firmly engaged state while preventing fracture and damage thereof caused by an assembling shock generated when assembling a printed circuit board and a rear cover. The printed circuit board has upper hook flaps protruded from a side surface of the rear cover including a plurality of slide grooves and lower hook flaps provided on the side of the upper hooks for penetrating holes is provided, the hook flaps are composed of supporting ribs and protrusions. Especially, the protrusions of the upper hook flap have an inclined angle to assemble the printed circuit board that is combined the rear cover stably.

Abstract: An image distortion correcting device with reduced cost and reduced consumption power is provided. Horizontal correction coils (L1) and (L2) are wound around partial cores (4a) and (4b). The two horizontal correction coils (L1) and (L2) are wound in such winding directions that they produce magnetic fields in opposite directions. A bobbin (5) having an insulating property covers the partial cores (4a) and (4b) and magnets (2) and (3) in the winding direction of the horizontal correction coils (L1) and (L2), and a vertical correction coil (L3) is wound on the bobbin (5) around the partial cores (4a) and (4b) along the windings of the horizontal correction coils (L1) and (L2). That is to say, the vertical correction coil (L3) is wound over the horizontal correction coils (L1) and (L2) along the periphery of their windings with the bobbin (5) interposed therebetween.

Abstract: In a color cathode ray tube having a flat panel exterior surface, the screen distortion and the convergence give rise to problems. To overcome these problems, by arranging bar magnets in such a manner that they are disposed parallel to a screen and are shifted from upper and lower ends of a horizontal deflection coil of a deflection yoke by not less than 10 mm in the direction perpendicular to a tube axis, the distortion of the screen and the characteristics of the convergence can be simultaneously improved.

Abstract: The present invention relates to a deflection yoke which includes an iron plate on a neck portion of a coil separator to convert PQH from a negative tendency to a positive one so that degradation of convergence features can be prevented. The deflection yoke of the invention comprises: a coil separator including a screen portion coupled to a screen panel of a CRT, a rear cover, and a neck portion extended from the central plane of the rear cover to be coupled to an electron gun portion of the CRT; horizontal and vertical deflection coils provided in the inner and outer sides of the coil separator to form horizontal and vertical deflection magnetic fields to control an electron beam; and compensating means provided in the neck portion of the coil separator to compensate convergence on a screen.

Abstract: An electromagnet comprises a pair of magnetic pole 1a and 1b, a return yoke 3, exciting coils 4 and 5, etc. In an interior portion of a magnetic pole, plural spacers 2a-2g are provided putting side by side in a horizontal direction. Each of the spaces 2a-2g is an air layer and a longitudinal cross-section is a substantially rectangular shape and the space has a lengthily extending slit shape in a vertical direction against a paper face in FIG. 1. The plural spaces are mainly arranged toward a right side from a beam orbit center O and an interval formed between adjacent spaces is narrower toward the right side. The electromagnet having a simple magnetic pole structure and a wide effective magnetic field area in a case where a maximum magnetic field strength is increased can be secured.

Abstract: A deflection yoke includes a bobbin having a cavity formed in the longitudinal direction of the bobbin, and an adjusting coil having a magnetic core on which a thread is cut. The core inserted into the cavity is slidable in the longitudinal direction of the bobbin. The core has a marker formed on only one of ends of the core in the longitudinal direction. The core has been inserted into the cavity from the one end formed with the marker or the other end. The marker is formed on only one of ends of the core before or after the thread is cut thereon.

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: In a color display tube including an envelope including a front panel and a funnel, and an electron gun provided in a neck portion of the funnel, a horizontal outer diameter of the neck portion in a region on a rear end side is greater than a vertical outer diameter thereof in this region and a horizontal outer diameter thereof in a region on the front panel side, and a main lens of the electron gun is formed in the region on the rear end side. With this configuration, it is possible to achieve both an electric power saving and a high resolution in a display screen in a color display tube device, as well as to mount a deflection yoke in the color display tube easily.

Abstract: A deflection yoke for a cathode ray tube comprises a funnel shaped separator means 1a, 1b having a cylindrical neck portion 3 where a magnetic ring is attached. The magnetic ring is engaged with upward holding portions 33a, 33b and with downward holding portions 32a, 32b, which hold such magnetic ring. Root portions 33a3 and 33b3 of the downward holding portions 32a and 32b are substantially inflexible, where the inner circumference of the magnetic ring substantially contacts the root portions 33a3 and 33b3, and the root portions 33a3 and 33b3 restrict the position of magnetic ring from being disengaged from the protrusions 33a1 and 33b1 when the downward holding portions 33a and 33b are forced to disengage the magnetic ring.

Abstract: A convergence magnet assembly for a cathode ray tube (CRT) includes a convergence magnet assembly having at least a one pair of magnet rings having magnetized portions at angular intervals and installed on a neck portion of a CRT for static convergence of three electron beams in an in-line arrangement; and a correction ring with an odd number of poles located at one side of the neck, adjacent an electron beam at one side of the in-line three electron beams, increasing a shift in the electron beam position caused by the pair of magnet rings.

Abstract: A deflection yoke of Braun tube having a horizontal deflection coil for horizontally deflecting electron beams radiated from an electron gun, a vertical deflection coil for vertically deflecting the electron beams, and a holder inserted between the horizontal and the vertical deflection coils for mechanically fixing them and electrically insulating them, including: an auxiliary coil having a first deflection portion coil extendedly formed from a ‘3-o'clock’ position of a neck side to a ‘3-o'clock’ direction of a screen side on the basis of the lengthy direction of the deflection coil; a first flange coil extendedly formed for a predetermined length from a ‘3-o'clock’ position of the screen side to a ‘12-o'clock’ direction of the screen side; a second deflection portion coil extendedly formed for a predetermined length from a ‘12-o'clock’ position of the screen side to a ‘12-o'clock’ direction of the neck side; a second flange coil extende

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 cathode-ray tube apparatus has a compensation mechanism for generating a magnetic field that compensates a change in a horizontal-deflection magnetic field due to a change in the temperature of horizontal-deflection coils. The compensation mechanism is formed of auxiliary coils to which a current is supplied in synchronism with horizontal deflection of electron beams, and a control element for controlling the current supplied to the auxiliary coils in accordance with a change in the temperature of the horizontal-deflection coils.

Abstract: An electromagnet comprises a pair of magnetic pole 1a and 1b, a return yoke 3, exciting coils 4 and 5, etc. In an interior portion of a magnetic pole, plural spacers 2a-2g are provided putting side by side in a horizontal direction. Each of the spaces 2a-2g is an air layer and a longitudinal cross-section is a substantially rectangular shape and the space has a lengthily extending slit shape in a vertical direction against a paper face in FIG. 1. The plural spaces are mainly arranged toward a right side from a beam orbit center O and an interval formed between adjacent spaces is narrower toward the right side. The electromagnet having a simple magnetic pole structure and a wide effective magnetic field area in a case where a maximum magnetic field strength is increased can be secured.

Abstract: A cathode ray tube including (a) a panel having a fluorescent film on an inner surface thereof for three primary colors emission, (b) an electron gun for emitting electron beams to the fluorescent film, (c) a deflecting yoke located between the panel and the electron gun, and including first and second coils for generating horizontally and vertically deflected magnet fields, (d) at least one first compensator (34) composed of magnetic substance having high magnetic permeability and low hysteresis characteristic for compensating for a profile of magnetic flux density in the horizontally deflected magnetic field, and (e) at least one second compensator (35) composed of magnetic substance having hysteresis characteristic for keeping magnetization when a polarity of the horizontally deflected magnetic field is inverted.

Abstract: The present invention provides deflection yoke devices used for a cathode ray tube. One of the deflection yoke devices of the present invention comprises a compensation coil having a bobbin formed with a hollow in which an internal thread is cut, a screw core forcibly fitting in the hollow of the bobbin and a damping material interposed between the bobbin and the screw core to prevent the displacement of the screw core when an external vibration or a shock is applied to the deflection yoke device.

Abstract: A deflection yoke includes horizontal deflection coils; vertical deflection coils; and coils for correcting a vertical pincushion distortion, which coils are provided aside from the vertical deflection coils; wherein the coils for correcting a vertical pincushion distortion have such a wire-wound form as to generate a magnetic field having a pattern substantially equal to that of the vertical deflection coils. This is effective to carry a parabolic current with horizontal cycles for correcting a vertical pincushion distortion at a low voltage, and hence to simplify the circuit configuration and reduce the manufacturing cost.

Abstract: A cathode ray tube having a deflection unit, the play between the deflection unit (11) and the envelope (4) being different for two perpendicular (x and y) directions. This enables the tilt of the deflection unit relative to the envelope to be greater in a direction than in a direction at right angles to said direction. By virtue thereof, the distance between the deflection unit and the electron beams can be reduced, so that the deflection requires less energy and can be improved.

Abstract: Disclosed is a novel composite magnet assembly for an insertion device of the Halbach type or hybrid type to be inserted into the linear part of, for example, an electron accelerator to generate a sine-curved periodical magnetic field in the air gap between two oppositely facing composite magnet block arrays. Different from a conventional magnet block assembly consisting of a plurality of permanent magnet blocks or alternate assembly of permanent magnet blocks and soft-magnetic pole pieces, the inventive magnet block assembly is composed of a plurality of oppositely facing composite magnet blocks each formed with a single base magnet block provided with a plurality of slits into which insert magnet pieces or insert pole pieces are inserted so that the dimensional accuracy in the length-wise direction of the magnet block assembly can be greatly decreased to improve the regularity of the periodical magnetic field.

Abstract: A magnet for use in a magnetic matrix display has a two dimensional array of apertures between opposite poles of the magnet. The direction of the magnetic field is such that the magnet generates, in each channel, a collimating magnet field for forming electrons from a cathode into an electron beam. A `keeper`, area around the periphery of the magnet is used to improve the linearity of the field strength in the apertures from apertures at the center of the magnet to apertures at the periphery of the magnet. The `keeper`, area may have control circuits placed on the surface of that area of the magnet. The keeper area may contain apertures which are not used for collimation and into which electrons are prevented from entering by a grid electrode or by a physical blocking means.

Abstract: Provided are non-halogen, flame-resistant, resin materials and resin magnet materials, and also electron beam controllers comprising the resin magnet materials. The resin material comprises (A) a non-halogen resin composition, (B) a metal oxide hydrate, and (C) one or both of antimony trioxide and zinc borate. The resin magnet material comprises those components (A), (B) and C), and (D) a magnetic material. In the electron beam controller, the four-pole and 6-pole convergence magnets and the two-pole purity controller magnets are made of the resin magnet materials.