Indirectly heated cathode structure for electron tubes

Details Indirectly heated cathode structure for electron tubes Indirectly heated cathode structure for electron tubes

1987-12-18

1989-04-11

Moore, David K.

Electric lamp and discharge devices

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

For indirectly heated cathode

313337, H01J 194

Patent

active

048209546

ABSTRACT:
An indirectly heated cathode structure for electron tubes comprises a cathode supporting sleeve, an electron emission section fitted on a part of the supporting sleeve, and a heater arranged inside the supporting sleeve, the supporting sleeve being an alloy containing niobium as a main component, more particularly more than 85 weight % of niobium. As an additive, at least one metal selected from titanium, zirconium, hafnium, vanadium, tantalum, molybdenum and tungsten is used.

REFERENCES:
patent: 2673277 (1954-03-01), Lemmens et al.
patent: 4570099 (1986-02-01), Green
Reinhold Publishing Company, (1960), pp. 538-541, "Materials and Techniques For Electron Tubes"; Walter H. Kohl.

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