Quick warm-up heat-shielded cathode structure for cathode ray tubes

Claim 1

IN A CATHODE RAY TUBE ELECTRON GUN ASSEMBLY HAVING AT LEAST ONE ELECTRICALLY INSULATIVE ROD SUPPORTING A PLURALITY OF ASSOCIATED ELECTRODE ELEMENTS INCLUDING AN APERTURED CONTROL GRID, A RELATED SHIELDED CATHODE STRUCTURE COMPRISING: A CATHODE SLEEVE HAVING AN OPEN END PORTION AND AN OPPOSITE WALLED END PORTION WITH ELECTRON EMISSIVE MATERIAL TERMINALLY DISPOSED THEREON; METALLIC SHIELD MEANS FORMED TO SUPPORT AND SHIELD SAID CATHODE, SAID SHIELD MEANS BEING OF TUBULAR SHAPE HAVING OPEN ENDS AND COMPRISING UPPER AND LOWER PORTIONS OF DIFFERENT DIAMETRICAL DIMENSIONS WITH AN EXTERIOR PLANAR SEATING PROVISION INTEGRALLY FORMED OF SAID SHIELD MATERIAL INTERMEDIATE SAID OPEN ENDS THEREOF, SAID LOWER SHIELD PROTION HAVING A PLURALITY OF SPACED APART LONGITUDINAL SUPPORT MEANS FORMED THEREIN TO PROVIDE LONGITUDINAL SUPPORT TO SAID OPEN END CATHODE PORTION ORIENTED IN AN ATTACHED THERETO, THEREBY FORMING A SHIELDED CATHODE ASSEMBLY WITH SAID UPPER SHIELD PORTION BEING SPACED FROM SAID UPPER CATHODE PORTION; AND A CATHODE ASSEMBLY SUPPORT MEMBER HAVING AT LEAST ONE FIRST SECTION WITH AT LEAST ONE FORMED EXTREMITY ATTACHED TO SAID INSULATIVE ROD AND A SECOND SECTION FORMED AT SUBSTANTIALLY RIGHT ANGLES TO SAID FIRST SECTION TO PROVIDE A SHIELD BONDING SURFACE HAVING AN OPENING FORMED THEREIN OF A SIZE TO ACCOMMODATE SAID ASSEMBLY WITH SAID SHIELD PLANAR SEATING PROVISION BEING ATTACHED TO SAID SECOND SECTION PERIPHERAL TO SAID OPENING TO PROVIDE A RIGIDLY SUPPORTED CATHODE-SHIELD STRUCTURE WHEREBY SAID EMISSIVE MATERIAL IS ORIENTED IN SPACED RELATIONSHIP WITH SAID CONTROL GRID APERTURE.