X-ray or gamma ray systems or devices – Electronic circuit – With switching means
Patent
1988-02-04
1989-08-29
Fields, Carolyn E.
X-ray or gamma ray systems or devices
Electronic circuit
With switching means
378118, 378200, H05G 154
Patent
active
048624896
ABSTRACT:
An x-radiator has a housing filled with electrically insulating fluid and having a radiation exit window, an x-ray tube disposed in the housing surrounded by the fluid and directing x-radiation through the exit window. During operation, the x-ray tube generates heat, causing an increase in pressure of the fluid in the housing. A protection circuit is provided which discontinues operation of the x-ray tube when the pressure of the fluid in the housing reaches a limit value. In order to prevent the protection circuit from unexpectedly discontinuing operation of the x-ray tube during a patient examination, the x-radiator also includes a warning circuit which generates a signal when the pressure of the fluid in the housing reaches a threshold level, the threshold level being below the limit value.
REFERENCES:
patent: 3746862 (1973-07-01), Lombardo et al.
patent: 3955119 (1976-06-01), Perry et al.
patent: 4386320 (1983-06-01), Lafrance
Fields Carolyn E.
Porta David P.
Siemens Aktiengesellschaft
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