公开(公告)号：US3588568A

公开(公告)日：1971-06-28

申请号：US3588568D

申请日：1968-12-12

Applicant: RCA CORP

Inventor： SOHN FRANK M

IPC: H01J29/02 ,  H01J29/07 ,  H01J1/96 ,  H01J19/50 ,  H01J29/46

CPC classification number: H01J29/073 ,  H01J2229/0722

Abstract: A RECTANGULAR SHADOW-MASK TYPE COLOR PICTURE TUBE HAVING A SHADOW MASK COMPRISING AN APERTURED MASKING PORTION OF SPHERICAL CONTOUR AND HAVING A RECTANGULAR PERIPHERAL SKIRT PORTION ATTACHED TO ONE FLANGE OF A BARREL-SHAPED RECTANGULAR FRAME OF UNIFORM L-SHAPED CROSS SECTION, THE OTHER FLANGE OF WHICH EXTENDS INWARDLY TO SERVE AS AN ELECTRON SHIELD FOR THE SKIRT AND ONE FLANGE DURING OVERSCAN OF THE BEAM AT MAXIMUM DEFLECTION ANGLES. THE DIFFERENCE IN CURVATURE OF THE LONG AND SHORT SIDES OF THE BARREL-SHAPED FRAME IS SUCH THAT THE PORTIONS OF THE FRAME TO WHICH THE MOUNTING SPRINGS ARE ATTACHED LIE SUBSTANTIALLY IN A COMMON PLANE PERPENDICULAR TO THE CENTRAL TUBE AXIS, THUS PERMITTING THE USE OF IDENTICAL SPRINGS.