Cathode structure for cathode ray tube

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

1996-12-03

1998-07-14

O'Shea, Sandra L.

Electric lamp and discharge devices

With support and/or spacing structure for electrode and/or...

For indirectly heated cathode

313332, 445 36, H01J 120

Patent

active

057809593

ABSTRACT:
An improved cathode structure for a cathode ray tube includes a first metal tube which can receive an emission part and a heating element, a second metal tube constituting the cathode shielding, and means for retaining the first tube in position inside the second, wherein the retaining means are constituted by a single metal piece. In a preferential mode of implementation, the metal retention piece is constituted by a crown having branches extending in the direction of the axis of the crown.

REFERENCES:
patent: 3906601 (1975-09-01), Buescher et al.
patent: 5113110 (1992-05-01), Jang
patent: 5218263 (1993-06-01), Falce et al.
patent: 5402035 (1995-03-01), Lee
patent: 5422536 (1995-06-01), Hale et al.
IEEE Transactions on Electron Devices, vol. 37, Nr. 12, pp. 2564-2567, Sakae Kimura et al., "IR-Coated Dispenser Cathode for CRT", Dec. 1, 1990.
French Search Report dated: Aug. 30, 1996.

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