.~ With container for radioactive source and radiation directing or selectable shielding {2}
498.1
.~.~ With pivoted or rotatable radiation shield
DEFINITION
Classification: 250/498.1
With pivoted or rotatable radiation shield:
(under subclass 496.1) Subject matter which includes a pivoted or rotatable radiation shield within the container or housing which cooperates with the passageway and the radioactive source to selectively permit in one position the radiation from the source to escape from the container or housing and in other positions to prevent the escape of
