Convergence- and purity-adjusting device for color television picture tube

Claim 2

A convergence device for a color television picture tube, said device comprising a body adapted to be mounted around the neck of a color television picture tube, said body having an opening therein for receiving the neck of the tube, first and second slides mounted on said body for movement in a direction transverse to the axis of the picture tube, each of said slides having at least one permanent magnet thereon, said magnet on said first slide and said magnet on said second slide being mounted in corresponding positions but being oppositely polarized, and drive means for moving said slides in opposite directions, so that the magnet on either of said slides can be moved closer to the neck of the picture tube.

Claim 3

A convergence device, according to claim 1, including a plurality of permanent magnets mounted on each of said slides in corresponding positions.

Claim 4

A convergence device, according to claim 1, including three permanent magnets mounted on each of said slides in corresponding positions, each magnet on one slide being oppositely polarized with respect to the corresponding magnet on the other slide.

Claim 5

A convergence device, according to claim 1, said drive means including a movable control member mounted on said body, and means operable by said control member for moving said slides in opposite directions.

Claim 6

A convergence device, according to claim 1, said drive means including a pinion rotatably mounted on said body, a control member for rotating said pinion, and first and second racks on said first and second slides for engaging opposite sides of said pinion, whereby rotation of said pinion causes movement of said slides in opposite directions.

Claim 7

A convergence device, according to claim 5, in which each of said slides is formed with a longitudinal slot which is elongated in the direction of movement of said slide, said pinion extending through said slots in said slides, said first and second racks being formed along opposite sides of said slots in said first and second slides.

Claim 8

A convergence device, according to claim 1, in which each magnet in said slides is positioned with its poles oriented along a line parallel to the direction of movement of said slides.

Claim 9

A convergence device, according to claim 1, in which each magnet is in the form of a bar, having magnetic poles oriented along a line parallel to the direction of movement of said slides.

Claim 10

A convergence device according to claim 1, in which each of said slides is formed with an opening for receiving the neck of the picture tube.

Claim 11

A convergence device according to claim 1, in which each of said slides is provided with with three of said magnets in corresponding positions, each magnet being in the form of a bar having magnetic poles extending generally along a line parallel to the direction of movement of said slides, each magnet being oppositely polarized relative to the corresponding magnet on the other slide.

Claim 12

A convergence device according to claim 10, said drive means comprising a pinion rotatably mounted on said body, control means for rotating said pinion, and racks on said slides for engaging opposite sides of said pinion, whereby rotation of said pinion causes movement of said slides in opposite directions.

Claim 13

A convergence device according to claim 1, in which each magnet is in the form of a bar, each slide being formed with a clip for holding said bar thereon.

Claim 14

A convergence device according to claim 12, in which each clip is formed integrally with the corresponding slide.

Claim 15

A convergence device according to claim 12, in which each of said slides is made of molded plastic material, each clip being molded integrally with the corresponding slide.

Claim 16

A convergence device according to claim 1, including a pair of purity-adjusting rings mounted on said body for rotary adjustment.

Claim 17

A convergence device according to claim 1, including a pair of purity-adjusting rings mounted on said body for rotary adjustment, said body having first, second and third posts projecting therefrom at spaced intervals, said first and second posts having outwardly facing grooves therein for rEceiving said rings, said third post having a clip removably mounted thereon for retaining said rings.

Claim 18

A convergence device according to claim 16, including at least one additional post projecting from said body and having an end surface engaging the side on one of said purity rings.

Claim 19

A purity-adjusting device for a television picture tube, said device comprising a body adapted to be mounted around the neck of the television picture tube, said body having an axial opening therein for receiving the neck of the tube, a pair of purity-adjusting rings mounted on said body for rotary adjustment, said body having first, second and third angularly spaced posts projecting therefrom generally parallel to the axis of said body for receiving said rings, said first and second posts having outwardly facing recesses therein for receiving and guiding said rings, said third post having an end face for slidably engaging one of said rings, a generally U-shaped spring clip removably mounted on said third post for slidably clamping said rings against said end face, said third post having an opening therein for receiving a portion of said clip, and two additional posts formed on said body adjacent to said first and second posts and having end surfaces engaging one of said rings, said recesses having end walls engaging the other of said rings, said rings being slidable between said end surfaces and said end walls.

Claim 20

A purity-adjusting device for a television picture tube, said device comprising a body adapted to be mounted around the neck of the television picture tube, said body having an axial opening therein for receiving the neck of the tube, a pair of purity-adjusting rings mounted on said body for rotary adjustment, said body having first, second and third angularly spaced posts projecting therefrom generally parallel to the axis of said body for receiving said rings, said first and second posts having outwardly facing recesses therein for receiving and guiding said rings, said third post having an end face for slidably engaging one of said rings, a generally U-shaped spring clip removably mounted on said third post for slidably clamping said rings against said end face, said third post having an opening therein for receiving a portion of said clip, and two additional posts formed on said body adjacent to said first and second posts and having end surfaces engaging one of said rings, said recesses having end walls engaging the other of said rings, said rings being slidable between said end surfaces and said end walls.