The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 11, 1998
Filed:
Mar. 14, 1996
Hiroshi Takakura, Mobara, JP;
Takashi Kono, Chousei-gun, JP;
Michihide Shibata, Chousei-gun, JP;
Yasuhiko Nonaka, Mobara, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Electronic Devices Co., Ltd., Chiba-ken, JP;
Abstract
A cathode ray tube has a cathode structure including a cathode body comprised of porous refractory metal impregnated with electron-emissive material, a metal cup for containing the cathode body therein, a metal sleeve having a closed end and mounting a heater therein, a cylindrical metal eyelet and a plurality of thin metal wires stretched across one end of the metal eyelet and suspending the metal cup and the metal sleeve concentrically with and in the cylindrical metal eyelet. The metal cup and the closed end of the metal sleeve are fixed with the plurality of thin metal wires interposed therebetween, and ends of the plurality of thin metal wires are welded to a metal flange formed at the one end of the metal eyelet. The metal cup can be welded to the closed end of the metal sleeve by an electron beam with the plurality of thin metal wires interposed therebetween. By virtue of providing the metal flange, the contact area for welding the metal wires is increased, thereby improving the welding strength and reliability.