Bore-insertable apparatus for stationary measurement of bore-wid

Details Bore-insertable apparatus for stationary measurement of bore-wid Bore-insertable apparatus for stationary measurement of bore-wid

1985-01-14

1986-03-11

Stearns, Richard R.

Geometrical instruments

Area integrators

Electrical

33147K, 73784, G01B 702

Patent

active

045744858

ABSTRACT:
A measuring device for long-term installation in a bore in a rock formation or 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 (7,8) which in corporation with a stop (6) 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 measureable diameter. Remote control setting of the initial position of the rod is necessary if both enlargement and constriction with time are to be measured.

REFERENCES:
patent: 1708333 (1929-04-01), Smith
patent: 4094189 (1978-06-01), Serata
patent: 4369653 (1983-01-01), Ciosek, Jr.
patent: 4457072 (1984-07-01), Andersen
patent: 4461171 (1984-07-01), de la Cruz

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