X-ray tube having multiple cathode filaments

Details X-ray tube having multiple cathode filaments X-ray tube having multiple cathode filaments

1987-08-06

1989-01-17

Fields, Carolyn E.

X-ray or gamma ray systems or devices

Electronic circuit

With switching means

378117, 378134, H05G 156, H05J 3506

Patent

active

047992484

ABSTRACT:
An X-ray tube having two individually energizable cathode filaments. If a primary filament is shorted to a cathode cup, a switch mounted inside the tube housing is thrown to couple a second filament to a filament energization signal. This avoids the necessity in replacing the X-ray tube if the primary filament is shorted and lengthens the effective life of the X-ray tube.

REFERENCES:
patent: 2141860 (1938-12-01), Gross et al.
patent: 2875344 (1959-02-01), Grinerich
patent: 3110810 (1963-11-01), Fransen
patent: 4017757 (1977-04-01), De Cou
patent: 4065689 (1977-12-01), Pleil
patent: 4315154 (1982-02-01), Weigl et al.
patent: 4685118 (1987-08-01), Furbee et al.

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