G - Physics – 01 – B
Patent
G - Physics
01
B
33/164
G01B 7/02 (2006.01) E21B 47/08 (2006.01) G01B 5/12 (2006.01)
Patent
CA 1233979
ABSTRACT OF THE DISCLOSURE A measuring device for long-term installation in a bore in a rock formation for detecting gradual changes in bore diameter, especially gradual constriction which might affect the condition of radioactive waste deposited in the bore, utilizes telescoping parts under outward spring pressure. One of the two elements of the transducer which by the relative displacement of these elements measures changes in diameter, is a rod held in a friction mounting on one of the telescoping parts that maintains the position of the device in the bore. The other element of the transducer is fixed on the other telescoping part which also carries limit stops, which in corporation with a stop on the rod confines the lengthwise movement of the rod to a stroke equal to the maximum measuring range of the transducer. For measuring gradual constriction, the transducer is automatically set to begin with the maximum measur- eable diameter. Remote control setting of the initial position of the rod is necessary if both enlargement and constriction with time are to be measured.
471894
Bolingen Johann
Keck Jurgen
Kreutz Ferdinand
Kernforschungsanlage Julich Gesellschaft Mit Beschrankter Haftun
Smart & Biggar
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