Vacuum tube grid structures of phosmic bronze having copper and

Electric lamp and discharge devices – Discharging devices with apertured electrode interposed... – Plural interposed apertured electrodes

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313299, 313311, 313348, H01J 146, H01J 2110

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active

040769925

ABSTRACT:
A vacuum tube includes a cylindrical cathode around which a frusto-conical control grid extends. The control grid, which is made out of Phosnic bronze, has its larger diameter end attached to the smaller end of a first hollow truncated copper cone. A cylindrical Phosnic bronze screen grid extends coaxially around the control grid. One end of the screen grid is attached to the smaller diameter end of a second hollow truncated cone. The second cone extends around the first cone and is made out of a copper clad alloy of cobalt, nickel and iron. An anode encircles the screen grid.

REFERENCES:
patent: 2939988 (1960-06-01), Culbertson et al.
patent: 3164740 (1965-01-01), Moscony et al.
patent: 3337933 (1967-08-01), Seiffarth et al.
patent: 3719856 (1973-03-01), Koppius
patent: 3784866 (1974-01-01), Manyafov et al.
patent: 3826948 (1974-07-01), Polese et al.
"Material and Techniques for Electon Tubes", by Walter H. Kohl, General Telephone & Electronics Technical Series, 1960 TK6565, V3K65, pp. 211-212.

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