Cathode structure

Details Cathode structure Cathode structure

1989-03-22

1990-09-04

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

313270, 313338, H01J 2948, H01J 115

Patent

active

049547453

ABSTRACT:
A dispenser cathode body includes a heat capturing portion extending rearwardly from the dispenser cathode, said heat capturing portion having greater mass and thickness than an exterior support skirt. A slip-in heater is received within the heat capturing portion. Substantially greater electron emission density is secured without requiring injuriously high temperatures from the slip-in heater.

REFERENCES:
patent: 2859371 (1958-11-01), Watson et al.
patent: 3967150 (1976-06-01), Lien et al.
"A Cavity Reservoir Dispenser Cathode for CRT's and Low-Cost Traveling-Wave Tube Applications", Louis R. Falce, I.E.E.E. Transaction on Elctron Devices, vol. 36, No. 1, Jan. 1989.

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