Magnetizing apparatus and method for producing a statically converged cathode ray tube and product thereof

Claim 1

A magnetizing apparatus for use in the static convergence of three in-line electron beams within a cathode ray tube including a magnetic material located adjacent to a neck portion of said cathode ray tube, comprising: a first plurality of windings suitably arranged for positioning about said neck portion in proximity to said magnetic material and adapted to receive a magnetizing current of sufficient magnitude that will create permanently magnetized regions within said magnetic material that produce a magnetic field within said cathode ray tube for like motion of the outer electron beams, a first multiplicity of windings of said first plurality providing for like motion in a predetermined direction and a second multiplicity providing for like motion in a direction substantially orthogonal to the direction provided by said first multiplicity; and a second plurality of windings suitably arranged for positioning about said neck portion in proximity to said magnetic material and adapted to receive a magnetizing current of sufficient magnitude that will create permanently magnetized regions within said magnetic material that produce a magnetic field within said cathode ray tube for opposite motion of said outer electron beams, a third multiplicity of windings of said second plurality providing for opposite motion in a predetermined direction and a fourth multiplicity providing for opposite motion in a direction substantially orthogonal to the direction provided by said third multiplicity, said first and second pluralities located in two planes generally perpendicular to the central axis of said cathode ray tube, the windings of said first and second pluralities so angularly oriented about said neck portion as to create compact nonoverlapping permanently magnetized regions.

Claim 22

A method of statically converging three in-line electron beams of a cathode ray tube comprising the steps of: locating a magnetic material adjacent a neck portion of said cathode ray tube; determining the misconvergence of said three in-line electron beams; positioning about said neck portion in substantially two planes generally perpendicular to the central axis of said cathode ray tube four multiplicities of windings, each winding adapted to receive a magnetizing current for creating permanently magnetized regions within said magnetic material capable of statically converging said three in-line electron beams; coupling to said first multiplicity current of appropriate magnitude and direction for providing like directed motion of the outer electron beams in a predetermined direction; coupling to said second multiplicity current of appropriate magnitude and direction for providing like directed motion in a direction substantially orthogonal to the direction provided by said first multiplicity; coupling to said third multiplicity current of appropriate magnitude and direction for providing oppositely directed motion of the outer electron beams in a predetermined direction; and coupling to said fourth multiplicity current of appropriate magnitude and direction for providing oppositely directed motion in a direction substantially orthogonal to the direction provided by said third multiplicity for statically converging said three in-line electron beams, the angular positioning of the windings of said four multiplicities creating compact nonoverlapping permanently magnetized regions.

Claim 23

A method of statically converging three in-line electron beams of a cathode ray tube comprising the steps of: locating a magnetic material adjacent a neck portion of said cathode ray tube; determining the misconvergence of said three in-line electron beams; positioning about said neck portion in substantially two planes generally perpendicular to the central axis of said cathode ray tube four multiplicities of windings, each winding adapted to receive a magnetizing current for creating permanently magnetized regions within said magnetic material capable of statically converging said three in-line electron beams; coupling to said first multiplicity current of appropriate magnitude and direction for providing like directed motion of the outer electron beams in a predetermined direction; coupling to said second multiplicity current of appropriate magnitude and direction for providing like directed motion in a direction substantially orthogonal to the direction provided by said first multiplicity; coupling to said third multiplicity current of appropriate magnitude and direction for providing oppositely directed motion of the outer electron beams in a predetermined direction; and coupling to said fourth multiplicity current of appropriate magnitude and direction for providing oppositely directed motion in a direction substantially orthogonal to the direction provided by said third multiplicity for statically converging said three in-line electron beams, the angular positioning of the windings of said four multiplicities creating compact nonoverlapping permanently magnetized regions.