Abstract: A television pick-up tube in an image pick-up system comprises an high-frequency magnetic deflection element which deflects the electron beam perpendicularly to the line direction in the television pick-up tube. As a result, residual charge remaining between the image lines on the target face of the television pick-up tube is neutralized. Inductive coupling of the high-frequency deflection element to the power supply increases the resonance frequency of the deflection element, so that the deflection element can operate at a frequency which exceeds the video signal frequency so that it does not interfere therewith.

Abstract: A deflection yoke includes a horizontal deflection coil including a pair of saddle-shaped coils having a front transverse conductor and a rear conductor; a pair of void-core type horizontal auxiliary coils disposed only on the front transverse conductor, each auxiliary coil having a front semi-circular arc side part, a rear semi-circular arc side part, a right straight side part connected between the front semi-circular arc side part and a left straight side part connected between the front semi-circular arc side part, the horizontal auxiliary coils being connected with the horizontal deflection coil, such that a horizontal deflection current flows in the horizontal auxiliary coils in a direction corresponding to a more intense leak magnetic field generated by the front transverse conductor of the horizontal deflection coil; and a coil holder for holding the horizontal auxiliary coils such that the front semi-circular arc side parts are positioned along the front transverse conductor of the pair of saddle-sha

Abstract: Unwanted electric fields in the area in front of a CRT can be produced by flyback voltage pulses which occur across the horizontal deflection coils and are coupled to the inner DAG coating of the CRT. The unwanted fields can be eliminated by providing voltage pulses equal and opposite to the causative voltage pulses and applying the provided voltage pulses to the inner coating and the anode button, leaving no fields to be cancelled in the relevant area.

Abstract: In a shadow mask type color cathode-ray tube, the coercive force of the shadow mask frame, internal magnetic shield, shadow mask and reinforcing band is limited to a specific value when they are magnetized at specific magnetic field, in order to eliminate any adverse influences of environmental magnetic field.

Abstract: An improved electron beam deflector with incorporated permanent magnets for picture correction, where the magnets and the magnetic field generated by these magnets are surrounded by an auxiliary magnetic shielding that forms one piece with the deflector and is positioned with high geometrical precision with respect to the magnets. This auxiliary shielding causes the picture correction efficiency to be unaffected by the shape and geometry of positioning of the metal elements in the vicinity of the deflector when it is being assembled and during its operation. The deflector can be used with picture tube devices, particularly of the cathode-ray type.

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 coil case with a coil receptacle for receiving a coil winding is formed integrally with cover flaps which are swingably joined to either end of the coil receptacle by hinge portions. The coil case has mounting pawls formed thereon. The coil winding is received inside the coil case and the cover flaps are closed, whereby a leakage magnetic field cancellation coil is assembled. The cancellation coil is mounted onto the deflection yoke by engaging the mounting pawls with a part of the deflection yoke. Since the coil case and the cover flaps are formed integrally with each other, the number of component parts is reduced, thereby facilitating manufacture. Further, the size of the cancellation coil is reduced, thereby reducing the material costs, hence, the production costs of the apparatus. Since the cancellation coil can be mounted onto the deflection yoke by a single-step operation utilizing the mounting pawls, the efficiency of the mounting operation is improved.

Abstract: In a quasi-optical gyrotron, two coils (3a, 3b) in a Helmholtz arrangement generate a static magnetic field which is axially symmetrical with respect to an electron beam axis (2). As a result, the electrons passing along the electron beam axis (2) parallel to the magnetic field are forced into gyration and excite an alternating electromagnetic field in a quasi-optical resonator. The resonator comprises two mirrors (4a, 4b) which are arranged opposite to one another on a resonator axis (5) and which exhibit a superconducting reflective surface (6a, 6b). The resonator axis (5) is aligned perpendicularly to the electron beam axis (2) between the two coils (3a, 3b). So that the superconduction is not impaired by the strong magnetic field, means for suppressing the magnetic field at the location of the mirros (4a, 4b) are provided. These means preferably comprise a yoke (10) of a material having a high magnetic permeability.

Abstract: A device for accelerating and storing charged particles of the present invention comprises a vacuum duct which has two opposite linear portions and two opposite curved portions respectively connected to the linear portions and which functions to maintain the orbit of revolution of the charged particles in a vacuum; an accelerating device for accelerating charged particles which is disposed on the orbit of the charged particles; a pair of bending magnets which are respectively disposed on the curved portions of the vacuum duct; and a pair of quadrupole electromagnets which are respectively disposed on the linear portions of the vacuum duct and at least one of which is disposed at a position at a given distance from the center of the corresponding linear portion.

Abstract: The present invention provides an apparatus and methods to reduce the stray magnetic fields created by the yoke assembly of a cathode ray tube (CRT) visual display device, and emitted from the CRT enclosure. A pair of closed wire loops are brought into contact with the yoke at the point where maximum magnetic radiation is emitted. The magnetic flux emitted from the yoke is coupled into the wire loop pair, inducing therein a current which flows so as to produce an opposing magnetic field to that produced by the CRT yoke. A capacitor in series in the second loop serves to increase the magnitude of the magnetic field produced by the second loop. Measured at a distance, the counteracting magnetic field reduces the total magnetic field emitted from the CRT enclosure.

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: An improved permanent magnet solenoid having a stepped transition in axial agnetic field profile and comprised of two permanent magnet solenoids, with appropriate cladding, placed in tandem and a radially magnetized ring magnet placed within the working cavity of the solenoids at the joint of entire structure.

Abstract: At least two pairs of auxiliary coils are disposed externally on a deflection yoke at positions which are symmetric with respect to the central axis of a horizontal direction of said deflection yoke and which are separated from each other in the direction of the axis of a cathode ray tube. At least two pairs of auxiliary coils are respectively disposed in front of and at the back of the longitudinal center of a magnetic core. The auxiliary coils have a horizontal length which is longer than its another length. A horizontal deflecting current is supplied to the first pair of auxiliary coils in the direction in which unnecessary radiant magnetic fields generated in front of and at the back of the deflection yoke are suppressed, and a horizontal deflecting current is supplied to the second pair of auxiliary coils in the direction in which an unnecessary radiant magnetic field generated at the back of the deflection yoke is intensified.

Abstract: An apparatus for minimizing hysteresis in a magnetic resonance imaging device of the type utilizing a pair of oppositely charged parallel pole faces forming a magnetic field therebetween, and gradient coils spaced apart from each pole face for producing time varying magnetic fields, comprises a layer of nonferromagnetic conducting material interposed between the pole face and the gradient coil. The interposed layer carries eddy currents induced by time varying magnetic fields produced by the gradient coils, thereby minimizing AC induced eddy current hysteresis from the pole faces. The layer preferably has a thickness of at least one skin depth at the frequency associated with the time varying magnetic field. The layer is preferably contiguous with the pole face, and comprises copper or aluminum. In another embodiment, each pole face has a plurality of slits therethrough radiating inward from the circumference for eliminating the eddy currents in the pole face.

Abstract: In a color picture tube apparatus, a deflection unit is provided around a color picture tube and a leakage magnetic is generated from the deflection unit. A metal cover made of aluminum, which covers an electrical power source is located in a space to which leakage magnetic field is reached and a first opposition magnetic field is generated from the metal cover due to the leakage magnetic field which produces an eddy current in the metal cover. A metal plate made of a conductive and non-magnetic material is so located between the deflection unit and the metal cover as to be substantially perpendicular to the metal cover. Thus, a second opposition magnetic field is so generated from the metal plate due to the leakage magnetic field as to substantially cancel the first opposition magnetic field.

Abstract: A cyclotron includes a magnetic field generating assembly defined by a pair of main, superconducting coils mounted about the axis of the cyclotron on a former. The coils are surrounded by an ion shield positioned within a cryostat. Radially outwardly of the shield are positioned a pair of coils which guide most or all of the magnetic flux due to the coils leaking out of the shield back into the shield.

Abstract: A picture display device having a display tube and a deflection unit comprising a field deflection coil and a line deflection coil is disclosed. To comply with a predetermined interference radiation standard, the picture display device is provided with one interference suppression coil or with a system of interference suppression coils, which interference supression coil or system of interference suppression coils is oriented and can be energized in such a manner that, measured at a predetermined distance from the picture display device, the strength of the local magnetic dipole field is below a desired standard.

Abstract: Apparatus for reducing net distributed magnetic radiation in front of and all about the outside of a cathode ray tube display device. In such cathode ray apparatus a deflection coil is provided having axially aligned and circumferentially aligned wire segments, relative to the central axis thereof, producing a distributed magnetic field in front of the screen as well as all about the outside of the device which is undesirable. The invention provides a magnetic shunt disposed between the deflection coil and the screen, the shunt comprising a substantially ring-shaped arrangement of magnetically permeable material having its configuration and position relative to the coil optimized to maximize cancellation of the net distributed magnetic field as a selected point in space in front of said screen as well as all about the display device, so as to provide optimized overall magnetic field reduction through the action of the shunt.

Abstract: Picture display device having a display tube (3) and a deflection unit (9) comprising a field deflection coil and a line deflection coil (11). To comply with a predetermined interference radiation standard, the picture display device comprises a first set of (horizontal) interference suppression coils 18, 19 arranged symmetrically relative to the plane of symmetry of the line deflection coil and a second set of (vertical) interference suppression coils 18a, 19a arranged at right angles to the plane of symmetry of the line deflection coil, which coils are oriented in such manner and in operation are energizable in such manner that, measured at a predetermined distance from the picture display device, at least the strength of the local magnetic dipole field is below a desired standard. Each coil of the second set preferably comprises at least two sub-coils arranged parallel to each other at a given distance in order to reduce the energy content of the coil system.

Abstract: Picture display device having a display tube and a deflection unit comprising a field deflection coil and a line deflection coil. To comply with a predetermined interference radiation standard, the picture display device is provided with one interference suppression coil or system of interference suppression coils is orientated and can be energized in such a manner that, measured at a predetermined distance from the picture display device, the strength of the dipole component is below a desired standard.

Abstract: A deflection yoke apparatus comprises pairs of horizontal and vertical deflection coils. A coil separator is located between both coils. A deflection core forms a magnetic path for a magnetic flux generated from both deflection coils. An auxiliary coil is arranged at least a one position in a vertical deflection direction outside the deflection core. A horizontal deflection current is supplied to this auxiliary coil. A magnetic field, generated from the auxiliary coil, reduces an intensity of externally leaking magnetic field which radiates outside the deflection core when a horizontal deflection current is supplied to the horizontal deflection coils.

Abstract: A magnetic deflector of the saddle-saddle type, for a trichromatic tube protected by a shield, with in-line guns and round-luminophor type screen, is designed to function with a saddle-torus type of magnetic deflector. The invention uses a saddle-saddle type of deflector in which the front leading-out wires have been reduced and the rear leading-out wires are laid flat. Furthermore, the ferrite piece is extended by a ring which surrounds the rear leading-out wires and is magneticlaly closed by a ferrite ring bearing a quadrupole coil powered by a parabolic current. The intention can be applied to round-luminiphor trichromatic tubes fitted with an external shield.

Abstract: A leakage magnetic field cancelling apparatus comprises a magnetic field generating apparatus and a cancelling coil arranged around the magnetic field generating apparatus. By allowing a direct current to flow through the coil, a magnetic field is generated therefrom. The leakage magnetic field generated from the magnetic field generating apparatus is cancelled or controlled by the magnetic field generated from the coil. Thus, the cancelling apparatus can be realized by a cheap and light coil made of a copper wire or the like.

Abstract: A pair of magnetic member for collecting leakage magnetic flux of barrel-shaped vertical deflection magnetical flux to produce an auxiliary vertical deflection magnetic field of pin-cushion type around the neck of a cathode ray tube at the part of the electron gun, wherein each magnetic member has a vertical principal face part which is to face in parallel to a vertical principal face part of the other magnetic member with regard to a vertical axis of the CRT, and a pair of bar-shaped member, that is an upper horizontal bars and a lower horizontal bars connected to the upper edge part and the lower edge part of the principal plane part and extending toward the neck of the cathode ray tube; the provision of the above-mentioned magnetic members on a deflection yoke of a color cathode ray tube decreases convergence coma and coma distortion of beam spots, and is suitable for producing color picture image with good color convergence, in especially large face wide deflection type color cathode ray tube.

Abstract: Disclosed is a radiation suppression device for suppressing undesired radiation which is caused by a leak magnetic field produced by a deflecting coil that is wound around a deflection yoke of a cathode ray tube display unit. An auxiliary coil is provided which is connected electrically to the deflecting coil on the outer wall face of the deflection yoke at a position corresponding to the position at which the deflecting coil is wound and both the number of turns and the winding direction of the auxiliary coil are so selected that the leak magnetic field produced by the deflecting coil is cancelled by the magnetic field produced by the auxiliary coil which is connected in series or in parallel with the deflecting coil.In order to allow the auxiliary coil to be mounted with ease, a plurality of hanger means are formed on the front and rear portions of the separator which forms the deflection yoke, and wires are hung over these hanger means when forming the auxiliary coil.

Abstract: A magnetic device of permanent magnet materials for the control of linearly xtending annular cross-sectioned magnetic fields formed of two concentrically nesting magnetic tubular elements defining an annular space therebetween, and inner and outer cladding magnets radially disposed around the outer of said tubular elements and interiorly of the inner of said tubular elements, the cladding magnets being thicker at the end extremities and diminishing in thickness towards and to the plane of zero magnetic potential at or near the center line of the device measured along its longitudinal axis.

Abstract: A rare earth permanent magnetic apparatus for the containment and control thout any substantial loss of field flux comprising electro-deposited layers of rare earth magnetic material disposed and laid up around a ferrite center core element, the first or inner layer comprising a uniformly thick supply magnet to produce the magnetic field to be controlled, and the second or cladding magnet constituting a layer of diminishing thickness from the outboard ends of the device towards and to the plane of zero magnetic potential at or near the middle of the device.

Abstract: A color television display apparatus comprises a color cathode ray tube (1), an electron gun apparatus (4) disposed in a neck region (2) of the color cathode ray tube (1), a deflection yoke (12) having vertical deflection coils (14) wound about a toroidal-type core (13) and magnetic members (18). Each magnetic member (18) is shaped nearly like a letter U, comprising: a first portion (19) adjacent to the rear end surface of the core (13), extending in a direction perpendicular to the center axis of the neck region (2); a second portion (20) extending backward from the outer end of the first portion (19); and a third portion (21) positioned opposed to the beam exit end of the electron gun apparatus (4) outside the neck region (2), extending in a direction perpendicular to the center axis of the neck region (2).

Abstract: A display device comprising a cabinet and an electromagnetic deflection yoke and a horizontal width adjusting coil received is the cabinet comprises a canceling coil for cancelling electromagnetic field noise generated from the electromagnetic deflection yoke received in the cabinet.

Abstract: Ferromagnetic structure of an ion source produced by permanent magnets and solenoids.In the ferromagnetic structure according to the invention, the system of solenoids is shielded on the outside of the useful volume of the source by a first ferromagnetic casing, the permanent magnets being mounted on the inner walls of a second casing shaped like a cylinder and made from ferromagnetic material, in order to channel the magnetic fluxes outside the useful volume into a ferromagnetic structure, the two casings being separated from one another by a material ensuring an adequate reluctance between the two ferromagnetic circuits.

Abstract: A return spring is placed in the center of a movable iron core and a through hole is formed in a movable contact rod to provide a pressure receiving part for reactive force on the inner wall of a cap.

Abstract: A radiation shield 14 for a cathode ray tube 10 neck 16 includes a sleeve 24 of insulating material. Bonded to the inner surface 26 of the sleeve 24 are a plurality of elongated, coaxially oriented spaced conductive elements 30. Similarly, a plurality of elongated, coaxially oriented spaced conductive elements 32 are bonded to the outer surface 28 of the sleeve 24. The inner elements 30 are offset from the outer elements 32. A conductive ring 40 is connected to each of the inner 30 and outer 32 elements along one end of the sleeve 24 and to ground potential by a drain strap 44.

Abstract: A self-converging deflection yoke having toroidally-wound vertical deflection coils incorporates a pair of magnetically permeable field formers mounted on either side of the yoke. The field formers shunt a portion of the external field flux to the vicinity of the electron gun assembly where they form a pincushion-shaped field which aids in vertical coma correction. In one embodiment, a yoke comprising planar-wound vertical coils incorporates both coma-correcting rear field formers and a pair of front crossarm assemblies for providing side-pincushion correction. The resultant yoke provides covergence of electron beams free of coma and side-pincushion distortion with reduced sensitivity to transverse motion. In another embodiment, similar results are obtained without the front crossarms by vertical deflection coil having a nonradial winding configuration.

Abstract: An electromagnetic device for magnetically focusing and deflecting an electron beam in a television camera tube comprising a vertical deflection coil, a horizontal deflection coil, a ferromagnetic coil and focusing coil. Electrostatic screens are respectively provided on the inner side of the vertical deflection coil and the outer side of the horizontal deflection coil. In order to prevent or substantially reduce interference signals in the focusing coil from the vertical and horizontal deflection coils, which interference is visible in a signal from a camera tube, the focusing coil comprises multifilar windings having the same winding direction and sense. The windings are connected in series such that the magnetic fields produced by each winding are of the same polarity.

Abstract: In a television receiver comprising a display system incorporating a kinescope having horizontal in-line electron beams and also incorporating a deflection yoke having toroidally-wound vertical deflection coils, where the kinescope utilizes a magnetically-permeable G3 focussing electrode in the electron guns to reduce deflection defocussing, an arrangement for correcting misconvergence of the electron beams caused by the magnetically-permeable G3 electrode comprises a pair of magnetically-permeable field formers disposed along and extending toward the rear of the yoke. The field formers are configured to collect a portion of the external fields generated by the vertical windings and direct those portions through the kinescope neck substantially at right angles to the electron beams in the vicinity of the exit end of the electron guns with a barrel-shaped transverse pattern.

Abstract: A scanning-area rotation device for an image pickup tube has a coil (10) for rotating a scanning-area by an electron beam on the target surface of an image pickup tube (14), a shield ring (46) for electrostatically shielding the coil (10) from the target of the image pickup tube (14), and a shield cover (44) for magnetically shielding the coil (10). The shield ring (46) electrostatically shields the target and signal circuit connecting to the target from the coil (10), but does not shield a magnetic flux from the coil (10) to the target. The shield cover (44) shields a magnetic flux developed by the coil (10) and extending to the exterior of the cover (44).

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 toroidal magnetic deflection coil for an electron beam lithography system which is compensated for deflection placement errors that normally result from eddy currents generated within the coil windings by deflection current inputs to the coil. The compensation is achieved through addition of passive conductive material along the outer periphery of the coil. The conductive material or layer is arranged close to the outer arms of the toroidal coil windings, and thereby compensates the eddy currents within the deflection coils generated by the deflection currents in the inner arms. The compensating material can be utilized to compensate for beam drag which results from the driving circuit settling time and the inductive or capacitive coupling as well, by adding more material of appropriate dimensions.

Abstract: Capacitive coupling between coils of an electron beam deflection yoke and between coils and the electron tube is reduced by electrostatic shields. The shields are continuous for best shielding. Eddy currents flow in the shield resulting from the magnetic beam deflection fields results in field distortion and power loss. The eddy current flow and the power loss are reduced by using a nickel chromium alloy material for the shield.

Abstract: A deflection system for television cameras with a focusing coil surrounded by a magnetic shielding cylinder in which the outside diameter of the focusing coil is approximately equal to the inside diameter of the magnetic shielding cylinder and the focusing coil and the magnetic shielding cylinder are connected to each other in a heat conducting manner.

Abstract: Image dissector camera with either of two shielding embodiments permits camera to be moveably mounted in earth's magnetic field and strong electrical magnetic fields. Each embodiment includes one or more mu metal closure members adapted to attenuate both axial and radial magnetic fields while the camera is stationary or being moved through the magnetic fields.

Abstract: A magnetic shield device is provided wherein an object to be shielded from an ambient field is surrounded by a hollow member of high permeability material which has an opening therein permitting visual or other access to the object but also permitting possible entry of a disturbing portion of the ambient field. A counter magnetic field for opposing and cancelling the disturbing field portion is produced by current flow through a conductor wound around the path of the disturbing field portion, the conductor preferably being in the form of a solenoid coil wound around a tubular portion of the member. A DC current may be applied and/or the conductor may be short-circuited with the current being produced from a counter electromotive force induced from changes in the ambient field.

Abstract: A pickup tube structure comprises an image pickup tube and a yoke assembly mounted on the pickup tube. The yoke assembly includes a magnetic shield in a specific arrangement with respect to the axis of the pickup tube, as well as beam focusing and deflecting coils. The shield is shaped in a cylindrical form with an almost linear joint portion placed in parallel with the tube axis. The angle between the plane including the joint portion and the tube axis and the plane including the direction of the magnetic field for the beam horizontal deflection and the tube axis is not smaller than about -30.degree. and is not larger than about +30.degree..

Abstract: A flexible electromagnetic shield is provided. The shield comprises interlaced filaments of at least one glassy metal alloy. The glassy alloy has a maximum permeability of at least about 50,000 and a coercivity of less than about 0.08 Oe.

Abstract: Interference oscillations in the frequency ranges around 0.2 MHz and 1 MHz are eliminated in a deflection coil by the provision of an additional circuit element. The additional circuit element can be formed by an additional electrically conductive foil which is connected to the current supply side of the line coil sections or by a capacitor which connects this supply line to the central contacts of the series-connected frame coil sections. The connection of the coil sections with respect to each other should usually be adapted to the winding sense of the coil sections so as to ensure proper elimination of the interference oscillations.