Electric lamp and discharge devices – Electrode and shield structures – Indirectly heated cathodes
Patent
1993-06-30
1995-08-22
O'Shea, Sandra L.
Electric lamp and discharge devices
Electrode and shield structures
Indirectly heated cathodes
313 37, H01J 122
Patent
active
054443270
ABSTRACT:
A heater for an indirectly heated vacuum tube cathode is formed of anisotropic pyrolytic graphite in which current passes through the graphite in the "c" direction.
REFERENCES:
patent: 4178530 (1979-12-01), Lersmacher et al.
patent: 4288717 (1981-09-01), Tanji et al.
patent: 4344012 (1982-08-01), Hubner et al.
patent: 5015908 (1991-05-01), Miram et al.
Grant Thomas J.
Treseder Robert C.
Fishman Bella
Lowe Allan M.
O'Shea Sandra L.
Patel Vip
Varian Associates Inc.
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