US3701065A — Color picture tube beam convergence apparatus

Claim 1

Independent Claim 362 words

The combination comprising: a tri-beam color kinescope having a screen for display of a color picture in response to the scanning thereof bY a plurality of electron beams in a succession of substantially parallel line sweeps, and having a cylindrical neck enclosing a trio of in-line beam paths, a central one of said in-line beam paths substantially coinciding with the longitudinal axis of said neck with the remaining outer ones of said in-line beam paths being substantially symmetrically disposed on opposite sides of said axis, and with all of said in-line beam paths traversing a region of the interior of said neck which is free of readily magnetizable structures; means for shifting one of said outer beam paths in a selectable one of a plurality of directions inclusive of directions parallel to, perpendicular to, and diagonal to the direction of said line sweeps, said shifting means comprising a first adjustable permanent magnet means, mounted on the exterior of said tube neck for positioning on one side of said tube neck region in a first location closely adjacent one of said outer beam paths, for producing a magnetic field intersecting with primary influence said one of said outer beams with a selectable one of a plurality of directions inclusive of directions parallel to, perpendicular to, and diagonal to the direction of said line sweeps; and additional means for shifting the other of said outer beam paths in a selectable one of a plurality of directions inclusive of directions parallel to, perpendicular to, and diagonal to the direction of said line sweeps; said additional shifting means comprising second adjustable permanent magnet means, mounted on the exterior of said tube neck for positioning on the side of said tube neck region opposite to said one side in a second location closely adjacent said other of said outer beam paths, for producing a magnetic field intersecting with primary influence said other of said outer beams with a selectable one of a plurality of directions inclusive of directions parallel to, perpendicular to, and diagonal to the direction of said line sweeps; and wherein each of said first and second permanent magnet field producing means is independently adjustable.

Claim 2

Dependent Claim 362 words

The combination comprising: a tri-beam color kinescope having a screen for display of a color picture in response to the scanning thereof bY a plurality of electron beams in a succession of substantially parallel line sweeps, and having a cylindrical neck enclosing a trio of in-line beam paths, a central one of said in-line beam paths substantially coinciding with the longitudinal axis of said neck with the remaining outer ones of said in-line beam paths being substantially symmetrically disposed on opposite sides of said axis, and with all of said in-line beam paths traversing a region of the interior of said neck which is free of readily magnetizable structures; means for shifting one of said outer beam paths in a selectable one of a plurality of directions inclusive of directions parallel to, perpendicular to, and diagonal to the direction of said line sweeps, said shifting means comprising a first adjustable permanent magnet means, mounted on the exterior of said tube neck for positioning on one side of said tube neck region in a first location closely adjacent one of said outer beam paths, for producing a magnetic field intersecting with primary influence said one of said outer beams with a selectable one of a plurality of directions inclusive of directions parallel to, perpendicular to, and diagonal to the direction of said line sweeps; and additional means for shifting the other of said outer beam paths in a selectable one of a plurality of directions inclusive of directions parallel to, perpendicular to, and diagonal to the direction of said line sweeps; said additional shifting means comprising second adjustable permanent magnet means, mounted on the exterior of said tube neck for positioning on the side of said tube neck region opposite to said one side in a second location closely adjacent said other of said outer beam paths, for producing a magnetic field intersecting with primary influence said other of said outer beams with a selectable one of a plurality of directions inclusive of directions parallel to, perpendicular to, and diagonal to the direction of said line sweeps; and wherein each of said first and second permanent magnet field producing means is independently adjustable.

Claim 3

Dependent Claim 187 words

Beam convergence apparatus for a color picture tube having a plurality of electron beams emanating from the neck of said tube in a nominally common plane and subject to passage toward the screen of said tube through a region of said neck free of the presence of internal magnetizable pole piece structures, said apparatus comprising: two permanent magnet structures mounted for respective positioning on opposite sides of said tube neck region for producing respective fields to primarily influence respectively different ones of said plurality of beams; and means for adjusting the strength and orientation of the field produced by each of said respective magnetic structures, such field orientation adjustments enabling shift of the associated beam in a selectable one of a plurality of directions inclusive of a direction parallel to a diagonal of said screen; and wherein: each of said magnet structures includes a pair of magnetized discs of low permeability material coaxially disposed relative to one another in a mounting therefor, each disc being magnetized on a diameter, and said discs being rotatable relative to one another to vary the strength of the produced magnetic field.

Claim 4

Dependent Claim 187 words

Beam convergence apparatus for a color picture tube having a plurality of electron beams emanating from the neck of said tube in a nominally common plane and subject to passage toward the screen of said tube through a region of said neck free of the presence of internal magnetizable pole piece structures, said apparatus comprising: two permanent magnet structures mounted for respective positioning on opposite sides of said tube neck region for producing respective fields to primarily influence respectively different ones of said plurality of beams; and means for adjusting the strength and orientation of the field produced by each of said respective magnetic structures, such field orientation adjustments enabling shift of the associated beam in a selectable one of a plurality of directions inclusive of a direction parallel to a diagonal of said screen; and wherein: each of said magnet structures includes a pair of magnetized discs of low permeability material coaxially disposed relative to one another in a mounting therefor, each disc being magnetized on a diameter, and said discs being rotatable relative to one another to vary the strength of the produced magnetic field.

Claim 5

Dependent Claim 38 words

Beam convergence apparatus as defined in claim 2, wherein: each of said magnet structures is rotatable about an axis that is parallel to the longitudinal axis of said tube to vary the orientation of the produced magnetic field.

Claim 6

Dependent Claim 51 words

Beam convergence apparatus as defined in claim 3, wherein: said magnetized discs are ceramic of barium ferrite material with the magnetization being stronger on one face thereof than on the other, and each of said magnet structures being assembled with the stronger magnetized faces of said respective discs abutting one another.

Claim 7

Dependent Claim 31 words

Beam convergence apparatus as defined in claim 4, wherein: said disc mounting includes a non-magnetic spindle, and said discs are pRovided with central transverse holes to snugly fit over said spindle.

Claim 8

Dependent Claim 41 words

Beam convergence apparatus as defined in claim 5, wherein: said disc mounting also includes a non-magnetic annular retaining collar having an inside diameter so related to the outside diameter of said disc that the disc is firmly secured within the collar.

Claim 9

Dependent Claim 53 words

Beam convergence apparatus as defined in claim 6, wherein: said disc mounting further includes a non-magnetic plate disposed around the neck of said tube normal to the longitudinal tube axis, and transverse holes through said plate on opposite sides of said tube neck in said common plane to receive said respective disc-supporting spindles.

Claim 10

Dependent Claim 34 words

Beam convergence apparatus as defined in claim 7, wherein: each of said disc-supporting spindles has a flange at one end to constrain said disc-retaining collars to rotary movements between said flange and said plate.

Claim 11

Dependent Claim 30 words

Beam convergence apparatus as defined in claim 8, wherein: said disc-retaining collars have notched peripheral edges by which to effect said field strength and orientation varying rotations of said discs.

Claim 12

Dependent Claim 157 words

In combination with a multibeam shadow-mask color kinescope having a neck enclosing a plurality of in-line beam sources, said beams passing from said sources toward the screen of said kinescope through a region of said neck free of the presence of magnetizable structures, apparatus comprising: a first pair of magnetized discs of low permeability material; a second pair of magnetized discs of low permability material; an apertured mount of non-magnetizable material for said first and second disc pairs, said tube neck being received within the aperture of said the mount, and said mount being positioned along the neck axis so as to encircle said structure-free region of said neck; and means for rotatably supporting each of said pair of discs on said mount in respective diametrically opposed positions spaced from said mount aperture, the discs of each pair being coaxially disposed and subject to individual rotation about an axis substantially parallel to the axis of said neck.

Claim 13

Dependent Claim 157 words

In combination with a multibeam shadow-mask color kinescope having a neck enclosing a plurality of in-line beam sources, said beams passing from said sources toward the screen of said kinescope through a region of said neck free of the presence of magnetizable structures, apparatus comprising: a first pair of magnetized discs of low permeability material; a second pair of magnetized discs of low permability material; an apertured mount of non-magnetizable material for said first and second disc pairs, said tube neck being received within the aperture of said the mount, and said mount being positioned along the neck axis so as to encircle said structure-free region of said neck; and means for rotatably supporting each of said pair of discs on said mount in respective diametrically opposed positions spaced from said mount aperture, the discs of each pair being coaxially disposed and subject to individual rotation about an axis substantially parallel to the axis of said neck.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1975-10-24	1976-04-24	1976-10-24	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1979-10-24	1980-04-24	1980-10-24	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1983-10-24	1984-04-24	1984-10-24	$7700.00	Window Closed / Lapsed

Color picture tube beam convergence apparatus

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