Monitoring devices for detecting fission products in a gaseous stream

Claim 1

A DEVICE FOR DETERMINING THE QUANTITY OR POSITIVELYCHARGED, RADIOACTIVE, SOLID IONS IN A GASEOUS STREAM, COMPRISING IN COMBINATION, A METALLIC CASING FORMED BY A FIRST AND A SECOND METALLIC BLOCK SECURED TOGETHER IN A DETACHABLE MANNER, WITH A GASTIGHT PACKING MEMBER INTERPOSED BETWEEN SAID FIRST AND SAID SECOND BLOCK, SO AS TO LIMIT BETWEEN SAID FIRST AND SAID SECOND BLOCK A CAVITY OF REVOLUTION AROUND AND AXIS, SAID CAVITY HAVING IN SECTION SUBSTANTIALLY THE SHAPE OF AN E, A BOSE TRANVERSING SAID FIRST BLOCK AND COMMUNICATING THEREFORE WITH SAID CAVITY, A COVER HAVING THE SHAPE OF A BELL WITH A PERIPHERAL FLANGE, SAID FLANGE BEING SECURED IN A DETACHABLE MANNER TO SAID FIRST BLOCK AROUND SAID BORE SO THAT SAID BELL CLOSES SAID BORE, A GASTIGHT PACKING MEMBER BETWEEN SAID FLANGE AND SAID FIRST BLOCK, A METALLIC DRUM MOUNTED IN SAID CASING FOR ROTATION AROUND SAID AXIS, SAID DRUM COMPRISING AN AXIAL CYLINDRICAL HUB AND A PERIPHERAL FLANGE AND HAVING THEREFORE IN SECTION SUBSTANTIALLY THE SHAPE OF AN E, THE E-SHAPE OF SAID DRUM BEING SUBSTANTIALLY THE SAME AS THE E-SHAPED OF SAID CAVITY SO THAT SAID DRUM FITS CLOSELY FOR ROTATION IN SAID CAVITY, A PASSAGE PROVIDED IN THE PERIPHERY OF SAID CASING AND ADAPTED TO BE TRANSVERSED BY SAID GASEOUS STREAM, SAID PASSAGE COMMUNICATING WITH SAID CAVITY FOR PASSING SAID GASEOUS STREAM ALONG A PORTION OF SAID PERIPHERAL FLANGE MEANS FOR PRODUCING IN SAID PASSAGE AN ELECTROSTATIC FIELD DIRECTING POSITIVELY-CHARGED IONS TRANVERSING SAID PASSAGE TOWARDS SAID PORTION OF SAID FLANGE, A RADIOACTIVITY DETECTOR CARRIED BY SAID CASING ON THE PERIPHERY OF SAID CAVITY, AND DRIVING MEANS FOR ROTATING SAID DRUM SO AS TO BRING, ACCORDING TO A PREDETERMINED PROGRAM, SUCCESSIVE AREAS OF THE PERIPHERAL FLANGE OF SAID DRUM IN FRONT OF SAID PASSAGE TO CONSTITUTE SAID PORTION TOWARDS WHICH ARE DIRECTED POSITIVELY CHARGED IONS TRANSVERSING SAID PASSAGE AND THEN IN FRONT OF SID DETECTOR, SAID DRIVING MEANS BEING FORMED BY A SHAFT WITH A FIRST PORTION HOUSED IN SAID BORE AND A SECOND PORTION HOUSED IN SAID COVER, BY A DRIVING MECHANISM LOCATED ON THE OUTSIDE OF SAID COVER AND JOURNALLED THEREON IN LINE WITH SHAFT, BY MEANS FOR ROTATING SAID DRIVING MECHANISM ACCORDING TO SAID PROGRAM, BY A RING OF MAGNETS CARRIED BY SAID MECHANISM FOR ROTATION AROUND SAID COVER, BY A RING OF POLE PIECES CARRIED BY SAID SECOND PORTION OF SAID SHAFT INSIDE SAID COVER IN REGARD TO SAID MAGNETS AND BY TRANSMISSION MEANS TRANSMITTING THE ROTATION OF SAID SHAFT TO SAID DRUM.

Claim 2

A DEVICE FOR DETERMINING THE QUANTITY OR POSITIVELYCHARGED, RADIOACTIVE, SOLID IONS IN A GASEOUS STREAM, COMPRISING IN COMBINATION, A METALLIC CASING FORMED BY A FIRST AND A SECOND METALLIC BLOCK SECURED TOGETHER IN A DETACHABLE MANNER, WITH A GASTIGHT PACKING MEMBER INTERPOSED BETWEEN SAID FIRST AND SAID SECOND BLOCK, SO AS TO LIMIT BETWEEN SAID FIRST AND SAID SECOND BLOCK A CAVITY OF REVOLUTION AROUND AND AXIS, SAID CAVITY HAVING IN SECTION SUBSTANTIALLY THE SHAPE OF AN E, A BOSE TRANVERSING SAID FIRST BLOCK AND COMMUNICATING THEREFORE WITH SAID CAVITY, A COVER HAVING THE SHAPE OF A BELL WITH A PERIPHERAL FLANGE, SAID FLANGE BEING SECURED IN A DETACHABLE MANNER TO SAID FIRST BLOCK AROUND SAID BORE SO THAT SAID BELL CLOSES SAID BORE, A GASTIGHT PACKING MEMBER BETWEEN SAID FLANGE AND SAID FIRST BLOCK, A METALLIC DRUM MOUNTED IN SAID CASING FOR ROTATION AROUND SAID AXIS, SAID DRUM COMPRISING AN AXIAL CYLINDRICAL HUB AND A PERIPHERAL FLANGE AND HAVING THEREFORE IN SECTION SUBSTANTIALLY THE SHAPE OF AN E, THE E-SHAPE OF SAID DRUM BEING SUBSTANTIALLY THE SAME AS THE E-SHAPED OF SAID CAVITY SO THAT SAID DRUM FITS CLOSELY FOR ROTATION IN SAID CAVITY, A PASSAGE PROVIDED IN THE PERIPHERY OF SAID CASING AND ADAPTED TO BE TRANSVERSED BY SAID GASEOUS STREAM, SAID PASSAGE COMMUNICATING WITH SAID CAVITY FOR PASSING SAID GASEOUS STREAM ALONG A PORTION OF SAID PERIPHERAL FLANGE MEANS FOR PRODUCING IN SAID PASSAGE AN ELECTROSTATIC FIELD DIRECTING POSITIVELY-CHARGED IONS TRANVERSING SAID PASSAGE TOWARDS SAID PORTION OF SAID FLANGE, A RADIOACTIVITY DETECTOR CARRIED BY SAID CASING ON THE PERIPHERY OF SAID CAVITY, AND DRIVING MEANS FOR ROTATING SAID DRUM SO AS TO BRING, ACCORDING TO A PREDETERMINED PROGRAM, SUCCESSIVE AREAS OF THE PERIPHERAL FLANGE OF SAID DRUM IN FRONT OF SAID PASSAGE TO CONSTITUTE SAID PORTION TOWARDS WHICH ARE DIRECTED POSITIVELY CHARGED IONS TRANSVERSING SAID PASSAGE AND THEN IN FRONT OF SID DETECTOR, SAID DRIVING MEANS BEING FORMED BY A SHAFT WITH A FIRST PORTION HOUSED IN SAID BORE AND A SECOND PORTION HOUSED IN SAID COVER, BY A DRIVING MECHANISM LOCATED ON THE OUTSIDE OF SAID COVER AND JOURNALLED THEREON IN LINE WITH SHAFT, BY MEANS FOR ROTATING SAID DRIVING MECHANISM ACCORDING TO SAID PROGRAM, BY A RING OF MAGNETS CARRIED BY SAID MECHANISM FOR ROTATION AROUND SAID COVER, BY A RING OF POLE PIECES CARRIED BY SAID SECOND PORTION OF SAID SHAFT INSIDE SAID COVER IN REGARD TO SAID MAGNETS AND BY TRANSMISSION MEANS TRANSMITTING THE ROTATION OF SAID SHAFT TO SAID DRUM.