Grid of pyrolytic graphite for a high-power electron tube and a

Details Grid of pyrolytic graphite for a high-power electron tube and a Grid of pyrolytic graphite for a high-power electron tube and a

1979-06-18

1980-10-21

Smith, Alfred E.

Electric lamp and discharge devices

Electrode and shield structures

Foraminous electrodes or shields

313349, 313356, 313352, 29 2514, 29 2515, H01J 146, H01J 914

Patent

active

042296749

ABSTRACT:
A thin-walled grid of pyrolytic graphite for a high-power electron tube such as a triode or tetrode has a lower end in the form of a bell-shaped sleeve provided with uniformly spaced longitudinal slots which stop short of the edge of the sleeve. The solid edge portion thus formed beneath each slot serves to fit the sleeve over a metal ring of the electron tube base. The grid sleeve is clamped against the metal ring by means of screws engaged in internally-threaded bores of the ring. The edge portions of the graphite sleeve are thus fractured so as to form longitudinal strips which compensate for differences in expansion between the graphite and the metal while ensuring good electrical contact.

REFERENCES:
patent: 3800378 (1974-04-01), Lee et al.
patent: 4119880 (1979-10-01), Wilcox et al.

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