Directly heated cathode for electron tube

Details Directly heated cathode for electron tube Directly heated cathode for electron tube

1980-01-10

1982-01-12

Chatmon, Jr., Saxfield

Electric lamp and discharge devices

Electrode and shield structures

Filament or resistance heated electrodes

313311, 313346R, H01J 114

Patent

active

043107770

ABSTRACT:
A directly heated cathode for an electron tube comprising a base plate made of an alloy containing 20 to 30% by weight of W, 0.12 to 0.28% by weight of Zr and the remainder being Ni and an electron emissive oxide layer disposed directly on the base plate shows good and stable electron emission properties and when it is installed in a television picture tube, the picture tube shows excellent initial properties.

REFERENCES:
patent: 4079164 (1978-03-01), Misumi
patent: 4220891 (1980-09-01), Ando et al.
patent: 4260665 (1981-04-01), Aida et al.

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