Cathode structure for a cathode ray tube

Details Cathode structure for a cathode ray tube Cathode structure for a cathode ray tube

1996-03-14

1998-08-11

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

313346R, 313337, 313270, 445 51, H01J 120

Patent

active

057931577

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.

REFERENCES:
patent: 4990823 (1991-02-01), Swaving et al.
patent: 5289076 (1994-02-01), Lee

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