Color picture tube having inline electron gun with coma correction members

In a cathode-ray tube having an inline electron gun therein for generating three inline electron beams and directing same beams along paths through magnetic deflection fields toward a cathodoluminescent screen of said tube, a first of the fields causing deflection of the beams in a first direction perpendicular to the inline direction of the electron beams, a second of the fields causing deflection of the beams in a second direction parallel to the inline direction of the beams, said gun including means for at least one of said beams, said shunting means comprising at least one magnetically permeable shunt, said shunt being a flat plate having a centered aperture therein, said shunt completely surrounding one of the electron beam paths, the improvement comprising

• said shunt being longer in the first direction than in the second direction and being symmetric about a central axis of the shunt that parallels the first direction and symmetric about another central axis of the shunt that parallels the second direction, wherein the exterior peripheral shape of said shunt is rectangular, and wherein the aperture in said shunt is rectangular in shape with the sides of the aperture paralleling the external peripheral sides of said shunt.