Convergence means for inline-type cathode ray tube

Claim 2

Static convergence means for use with a cathode ray tube having a plurality of electron beams disposed in a predetermined array and extending therein, comprising: permanent magnetic means having at least a pair of poles; a first plurality of pole piece means extending from said poles for supporting a first magnetic field which traverses the beam array in a first direction; a second plurality of pole piece means extending from said poles for supporting a second magnetic field which traverses the beam array in a direction opposite said first direction; said second magnetic field substantially offsetting the effect of said first magnetic field upon predetermined ones of the electron beams.

Claim 3

Static convergence means for adjustably determining the relative position of ones of a set of electron means extending within the neck of a cathode ray tube, comprising: permanent magnetic means having a first and a second magnetic pole; first means for forming first and second magnetic paths between said first magnetic pole and first and second points about the tube neck, said second path having a higher reluctance than said first path; second means for forming third and fourth magnetic paths between said second magnetic pole and third and fourth points about the tube neck, said fourth path having a higher reluctance than said third path; said first, second, third and fourth points lying in a substantially common plane.

Claim 4

Static convergence means for adjustably determining the relative position of ones of a set of electron means extending within the neck of a cathode ray tube, comprising: permanent magnetic means having a first and a second magnetic pole; first means for forming first and second magnetic paths between said first magnetic pole and first and second points about the tube neck, said second path having a higher reluctance than said first path; second means for forming third and fourth magnetic paths between said second magnetic pole and third and fourth points about the tube neck, said fourth path having a higher reluctance than said third path; said first, second, third and fourth points lying in a substantially common plane.

Claim 5

The invention defined in claim 2, further including: second permanent magnetic means having a first and a second magnetic pole; third means for forming fifth and sixth magnetic paths between said first magnetic pole of said second permanent magnetic means and fifth and sixth points about the tube neck, said sixth path having a higher reluctance than said fifth path; fourth means for forming seventh and eighth magnetic paths between said second magnetic pole of said second permanent magnet means and seventh and eighth points about the tube neck, said eighth path having a higher reluctance than said seventh path; said third and fourth means being adapted to be disposed symmetrically with said first and second means about the tube neck.

Claim 6

The invention defined in claim 3, wherein said first and said third points are disposed between said second and said fourth points, and said fifth and said seventh points are disposed between said sixth and said eighth points.

Claim 7

The invention defined in claim 4, wherein the magnetic fields arising between said first and said third, and said fifth and said seventh, points are substantially stronger than those arising between said second and fourth, and said sixth and eighth, points.

Claim 8

Static convergence means for adjustably positioning ones of a set of three electron beams arrayed in a substantially common plane and extending within the neck of a shadow-mask type color television cathode ray tube, comprising: first and second permanent magnet means disposed at opposite ends of the beam array; a first plurality of magnetic path means for connecting opposite poles of each of said magnet means to points about the tube neck located on opposite sides of the plane; a second plurality of magnetic path means for connecting opposite poles of each of said magnet means to points about said tube neck located on opposite sides of the plane, said second magnetic path means having substantially less reluctance than said first magnetic path means, the first and second magnetic path means extending from any given pole connecting said pole to points lying on opposite sides of said plane.

Claim 9

Static convergence means for adjustably positioning ones of a set of three electron beams arrayed in a substantially common plane and extending within the neck of a shadow-mask type color television cathode ray tube, comprising: first and second permanent magnet means disposed at opposite ends of the beam array; a first plurality of magnetic path means for connecting opposite poles of each of said magnet means to points about the tube neck located on opposite sides of the plane; a second plurality of magnetic path means for connecting opposite poles of each of said magnet means to points about said tube neck located on opposite sides of the plane, said second magnetic path means having substantially less reluctance than said first magnetic path means, the first and second magnetic path means extending from any given pole connecting said pole to points lying on opposite sides of said plane.

Claim 10

The invention defined in claim 6, wherein the points connected to the poles of a given permanent magnet means by ones of said second plurality of magnetic path means are disposed intermediate the points connected to the poles of said permanent magnet means by ones of said first plurality of magnetic path means.

Claim 11

The invention defined in claim 7, further including third and fourth permanent magnet means having poles of a first type disposed adjacent the opposite ends of the beam array and poles of a second type disposed above and below the plane; means for magnetically coupling poles of said first type to ones of said first magnetic path means; and means for coupling poles of said second type to ones of said second plurality of magnetic path means.

Claim 12

The invention defined in claim 8, wherein said third and said fourth permanent magnet means comprise elongate permanent magnets magnetized transversely at the center and the ends thereof to provide six magnetic poles.

Claim 13

Static convergence means for use with a color television cathode ray tube of the type characterized by the absence of pole shoes within the neck portion thereof, and having a plurality of electron beams arrayed in a common plane and extending within the neck portion, comprising: first and second elongate pole piece means each comprising end portions and an intermediate portion, said intermediate portions being adapted to extend on opposite sides of the tube neck and substantially parallel to the plane of the beams, the ends of each of said pole piece means extending to points about the neck which lie at the opposite side of the plane from the intermediate portion thereof; first and second horizontal convergence magnets disposed at opposite ends of the beam array and having poles thereof disposed in close conjunction to points between the mid points and the ends of each of said pole pieces; said pole pieces having magnetic restrictions formed therein between the midpoints thereof and said points disposed in close conjunction with said magnetic poles.

Claim 14

Static convergence means for use with a color television cathode ray tube of the type characterized by the absence of pole shoes within the neck portion thereof, and having a plurality of electron beams arrayed in a common plane and extending within the neck portion, comprising: first and second elongate pole piece means each comprising end portions and an intermediate portion, said intermediate portions being adapted to extend on opposite sides of the tube neck and substantially parallel to the plane of the beams, the ends of each of said pole piece means extending to points about the neck which lie at the opposite side of the plane from the intermediate portion thereof; first and second horizontal convergence magnets disposed at opposite ends of the beam array and having poles thereof disposed in close conjunction to points between the mid points and the ends of each of said pole pieces; said pole pieces having magnetic restrictions formed therein between the midpoints thereof and said points disposed in close conjunction with said magnetic poles.

Claim 15

The invention defined in claim 10, further including: first and second elongate vertical convergence magnet means magnetized transversely near the middle and the ends thereof to comprise a plurality of first and second magnetic poles; first means extending from points intermediate said midpoints and said magnetic restrictions of said pole piece means to ones of said first poles of said vertical convergence magnet means; second means extending from the end portions of said pole piece means to ones of said second poles of said vertical convergence magnet means; third pole piece means extending from ones of said first poles of said vertical convergence magnet means to points about the neck which lie substantially in the plane of the arrayed elEctron beams; said first pole piece means having second magnetic restrictions formed therein between the midpoints thereof and said first means.

Claim 16

Static convergence means for adjustably positioning ones of three electron beams arranged in a substantially planar array and extending within the neck of a color television cathode ray tube, comprising: magnet means disposed at each end of said array adjacent said neck and containing magnetic poles, magnetic flux conducting means external to the neck of said cathode ray tube conducting flux between said poles so as to pass through said neck to effect the positioning of at least one said electron beams, said magnetic flux conducting means being arranged with respect to each magnet means to produce a primary magnetic field through said neck and a secondary magnetic field through said neck to control the reach of said primary field so that said primary magnetic field substantially effects the positioning of one of said electron beams.

Claim 17

Static convergence means for adjustably positioning ones of three electron beams arranged in a substantially planar array and extending within the neck of a color television cathode ray tube, comprising: magnet means disposed at each end of said array adjacent said neck and containing magnetic poles, magnetic flux conducting means external to the neck of said cathode ray tube conducting flux between said poles so as to pass through said neck to effect the positioning of at least one said electron beams, said magnetic flux conducting means being arranged with respect to each magnet means to produce a primary magnetic field through said neck and a secondary magnetic field through said neck to control the reach of said primary field so that said primary magnetic field substantially effects the positioning of one of said electron beams.

Claim 18

The invention defined in claim 12 wherein said magnet means comprise a permanent magnet adjustably positioned at each end of said array and said magnetic flux conducting means comprise pole piece means associated with each permanent magnet to channel magnetic flux to form said primary field in proximity to the electron beam adjacent said permanent magnet, said pole piece means being arranged to channel magnetic flux to form said secondary magnetic field in proximity to the other electron beams to offset the affect of said primary field on said other two electron beams.

Claim 19

The invention recited in claim 13 wherein the poles of each permanent magnet and said pole piece means are arranged to control horizontal movement of the electron beam adjacent to said permanent magnet.

Claim 20

The invention recited in claim 13 wherein the poles of each permanent magnet and said pole piece means are arranged to control vertical movement of the electron beam adjacent to said permanent magnet.

Claim 21

The invention recited in claim 12 wherein said magnet means comprise a pair of permanent magnets adjustably positioned at each end of said array and said magnetic flux conducting means comprise pole piece means associated with each pair of permanent magnets to channel magnetic flux to form said primary field for each permanent magnet in proximity to the electron beam adjacent to said permanent magnet and to channel magnetic flux to form said secondary field for each permanent magnet in proximity to the other two electron beams to offset the affect of said primary field on said other two electron beams.

Claim 22

The invention recited in claim 16 wherein ones of said pole piece means have a higher reluctance than the others of said pole piece means such that said secondary field is weaker than said primary field for each permanent magnet and is substantially equal to the fringe portion of said primary field that affects said other two electron beams.

Claim 23

The invention recited in claim 17 wherein the higher reluctance in said ones of said pole piece means is formed by magnetic restrictions of such size and placement to control the relative strength of each primary and secondary field and to minimize interference between the fluxes generated by different ones of said permanent magnets.

Claim 24

The invention recited in claim 18 wherein one of the permanent magnets in each pair of permanent magnets is movable to adjust the position of the electron beam adjacent to said pair in a horizontal direction and the other of said permanent magnets in each pair is movable to adjust the same electron beam in a vertical direction.