Document Type and Number:
Japanese Patent JPS4998687
Kind Code:
A
Abstract:
An internal ionization radiation sensor operates to discharge a capacitor in the presence of incident radiation. The recharging current is sensed by a threshold output device. In one embodiment, the threshold output device is prevented from receiving the additional current necessary to be triggered if the radiation sensor fails in the runaway mode. The additional current to trigger the threshold output device is supplied from a second capacitor which is prevented from charging by a runaway radiation sensor.
Application Number:
JP13746273A
Publication Date:
September 18, 1974
Filing Date:
December 11, 1973
Export Citation:
International Classes:
G01J1/42; G01T1/18; (IPC1-7): G01J5/36