Electron-discharge device cathode assembly with radiation shield

Claim 1

A CATHODE ASSEMBLY FOR THE ELECTRON GUN OF AN ELECTRON DISCHARGE DEVICE, SUCH AS A CATHODE-RAY TUBE, COMPRISING: A CATHODE CYLINDER BEARING ELECTRON EMITTING MATERIAL AT ONE END AND HAVING AN ENLARGED OPPOSITE END DEFORMED INTO A TRIANGULAR CROSS-SECTION; A RADIATION-SHIELD CYLINDER DISPOSED IN NESTED CONCENTRIC RELATION TO SAID CATHODE CYLINDER HAVING A MEAN DIAMETER APPROXIMATELY EQUAL TO THAT OF SAID ENLARGED END OF SAID CATHODE CYLINDER; SAID CYLINDERS BEING JOINED IN APPROXIMATELY LINE CONTACT AT THE APICES OF SAID TRIANGULAR CROSS-SECTION OF SAID CATHODE CYLINDER TO SECURE SAID CYLINDERS IN A MECHANICAL SUBASSEMBLY; A SUPPORT FOR SAID SUBASSEMBLY DISPOSED ABOUT SAID SHIELD CYLINDER; AND A SECOND PLURALITY OF SUPPORT ELEMENTS DISPOSED ABOUT SAID SUBASSEMBLY PROJECTING RADIALLY BETWEEN AND INTO LIMITED-AREA CONTACT WITH SAID SHIELD CYLINDER AND SAID SUPPORT TO MECHANICALLY SECURE SAID SUBASSEMBLY TO SAID SUPPORT, SAID SECOND PLURALITY OF SUPPORT ELEMENTS BEING DISPLACED WITH RESPECT TO SAID FIRST PLURALITY TO ESTABLISH A SERIES OF SEPARATED, THERMALLY CONDUCTIVE PATHS BETWEEN SAID CATHODE CYLINDER AND SAID SUPPORT INDIVIDUALLY HAVING A LENGTH THAT IS LONG COMPARED TO THE PHYSICAL SEPARATION OF SAID CATHODE CYLINDER AND SAID SUPPORT.