Toroidal electromagnetic deflection yoke

Claim 2

A toroidally wound deflection yoke for a delta gun shadow mask color television picture tube for providing convergence of the beams in the corners of a raster displayed on said picture tube, comprising: a cylindrical core having the inside portion thereof flared to conform generally with a flared portion of said picture tube, a pair of horizontal and vertical windings wound toroidally around said core for dEflecting the electron beams of said tube upon energization of said windings, each of said vertical and horizontal windings comprising symmetrical convolutions of wire in each of the quadrants of said yoke, forming portions of said vertical and horizontal windings therein, said quadrants being defined by the vertical and horizontal axes of deflection, each of said portions of said vertical and horizontal windings in each of said quadrants comprising at least convolutions of wire having a first predetermined angular separation from each other extending continuously throughout a first angular segment along the perimeter of said core from a line of symmetry of said quadrant and convolutions of wire having a second predetermined angular separation from each other extending continuously throughout a second angular segment along said perimeter from said line of symmetry, said first and second angular segments being selected for producing a magnetic field which provides convergence of the beams in the corners of said raster.

Claim 3

A toroidally wound deflection yoke as defined in claim 1 wherein said first and second angular segments are different whereby the conductor distribution density is higher in that portion of the quadrants wherein said first and second segments overlap than in that portion of the quadrants wherein said angles do not overlap.

Claim 4

A toroidally wound deflection yoke as defined in claim 2 wherein the angular separation of said convolutions of wire extending around said perimeter through said first angular segment is equal to the angular separation of said convolutions of wire extending through said second angular segment.

Claim 5

A toroidally wound deflection yoke as defined in claim 3 wherein said core is a ferrite core.

Claim 6

A toroidally wound deflection yoke as defined in claim 4 wherein said yoke includes a grooved end ring located at the front portion of said core, said grooves having an angular separation equal to said angular separation of said convolutions of wire wound around said core.

Claim 7

A toroidally would deflection yoke for a delta gun shadow mask color television picture tube for providing convergence of the beams in the corners of a raster displayed on said picture tube, comprising: a toroidal core; a first winding of conductors having a first angular separation from each adjacent conductor wound axially on said core and extending around said core; at least a second winding of conductors having a second angular separation from each adjacent conductor wound axially on said core and extending around said core; means for interconnecting a continuous portion of conductors contained within said first winding and a continuous portion of conductors contained within said second winding for forming each of a pair of horizontal and vertical deflection coils, the transverse cross-sectional conductor distribution of said horizontal and vertical coils being symmetrical about respective horizontal and vertical axes of said core said continuous portions of said first and second windings being selected to respectively extend around said core a predetermined distance for producing a magnetic field which provides convergence of the beams in the corners of said raster.

Claim 8

A toroidally would deflection yoke for a delta gun shadow mask color television picture tube for providing convergence of the beams in the corners of a raster displayed on said picture tube, comprising: a toroidal core; a first winding of conductors having a first angular separation from each adjacent conductor wound axially on said core and extending around said core; at least a second winding of conductors having a second angular separation from each adjacent conductor wound axially on said core and extending around said core; means for interconnecting a continuous portion of conductors contained within said first winding and a continuous portion of conductors contained within said second winding for forming each of a pair of horizontal and vertical deflection coils, the transverse cross-sectional conductor distribution of said horizontal and vertical coils being symmetrical about respective horizontal and vertical axes of said core said continuous portions of said first and second windings being selected to respectively extend around said core a predetermined distance for producing a magnetic field which provides convergence of the beams in the corners of said raster.

Claim 9

A toroidally wound deflection yoke for a delta gun color television picture tube, said yoke including horizontal and vertical coils wound on a toroidal core: each of said coils comprising convolutions of conductors having a predetermined angular separation from adjacent conductors in a layer wound axially on and extending around said core, said conductors forming a first layer extending around said core for different angles for the respective vertical and horizontal coils measured from respective vertical and horizontal axes of symmetry defining quadrants of said core; one of said coils further including a symmetrical portion in each of the four quadrants around said core, each portion including said angularly separated conductors in a second layer extendiNg continuously over a first angle around said core from an axis of symmetry, a separation of said coil conductors extending continuously over a second angle, and angularly separated conductors extending continuously over a third angle, said first, second and third angles being contiguous; and the other of said coils having a symmetrical portion in each of the four quadrants around said core, each portion including angularly separated conductors in said second layer extending continuously around said core over a fourth angle from another axis of symmetry, and a portion of said angularly separated conductors contained within said second angle of separation of said conductors of the one of said coils.

Claim 10

A toroidally wound deflection yoke for a delta gun color television picture tube, said yoke including horizontal and vertical coils wound on a toroidal core: each of said coils comprising convolutions of conductors having a predetermined angular separation from adjacent conductors in a layer wound axially on and extending around said core, said conductors forming a first layer extending around said core for different angles for the respective vertical and horizontal coils measured from respective vertical and horizontal axes of symmetry defining quadrants of said core; one of said coils further including a symmetrical portion in each of the four quadrants around said core, each portion including said angularly separated conductors in a second layer extendiNg continuously over a first angle around said core from an axis of symmetry, a separation of said coil conductors extending continuously over a second angle, and angularly separated conductors extending continuously over a third angle, said first, second and third angles being contiguous; and the other of said coils having a symmetrical portion in each of the four quadrants around said core, each portion including angularly separated conductors in said second layer extending continuously around said core over a fourth angle from another axis of symmetry, and a portion of said angularly separated conductors contained within said second angle of separation of said conductors of the one of said coils.

Claim 11

A toroidally wound deflection yoke according to claim 7 wherein said one of said coils is a vertical deflection coil and the other of said coils is a horizontal deflection coil.

Claim 12

A toroidally wound deflection yoke for a delta gun color television picture tube, said yoke including horizontal and vertical coils wound in two layers on a toroidal core: a first layer including conductors having a predetermined angular separation from each adjacent conductor extending continuously over a first angle around said core from a first axis of symmetry defining quadrants of said core for forming a portion of one of said vertical and horizontal coils in each of said quadrants, and conductors having a predetermined angular separation from each adjacent conductor extending continuously over a second angle around said core from a second axis of symmetry defining said quadrants for forming a portion of the other of said vertical and horizontal coils in each of said quadrants; a second layer including conductors having a predetermined angular separation from each adjacent conductor extending continuously over a first angle around said core from said first axis, having a separation between conductors over a second angle, and extending continuously for a third angle, said first, second and third angles being contiguous, for forming further portions of one of said vertical and horizontal coils, and conductors having a predetermined angular separation from each adjacent conductor extending continuously over a fourth angle around said core from said second axis and conductors extending continuously within said separation of conductors within said second angle for forming further portions of the other of said vertical and horizontal coils; and means for interconnecting said portions of said vertical and horizontal coils contained within said first and second layers.

Claim 13

A toroidally wound deflection yoke for a delta gun color television picture tube, said yoke including horizontal and vertical coils wound in two layers on a toroidal core: a first layer including conductors having a predetermined angular separation from each adjacent conductor extending continuously over a first angle around said core from a first axis of symmetry defining quadrants of said core for forming a portion of one of said vertical and horizontal coils in each of said quadrants, and conductors having a predetermined angular separation from each adjacent conductor extending continuously over a second angle around said core from a second axis of symmetry defining said quadrants for forming a portion of the other of said vertical and horizontal coils in each of said quadrants; a second layer including conductors having a predetermined angular separation from each adjacent conductor extending continuously over a first angle around said core from said first axis, having a separation between conductors over a second angle, and extending continuously for a third angle, said first, second and third angles being contiguous, for forming further portions of one of said vertical and horizontal coils, and conductors having a predetermined angular separation from each adjacent conductor extending continuously over a fourth angle around said core from said second axis and conductors extending continuously within said separation of conductors within said second angle for forming further portions of the other of said vertical and horizontal coils; and means for interconnecting said portions of said vertical and horizontal coils contained within said first and second layers.

Claim 14

A toroidally wound deflection yoke according to claim 9 wherein said one of said coils is a vertical deflection coil and the said other of said coils is a horizontal deflection coil.