Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Patent
1979-04-20
1981-09-15
Strecker, Gerard R.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
With radiant energy or nonconductive-type transmitter
324345, G01V 308
Patent
active
042900204
ABSTRACT:
Improved method and apparatus for detecting anomalies beneath an area of earth's surface wherein an oscillator couples a current into two conductors laid parallel to each other to generate two magnetic fields in the earth beneath the area. The magnetic field is measured along a line midway between the two horizontal conductors to detect for an increase in the measured field which is an indication of the presence of an anomaly.
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Andrew Wesley A.
Hansen Peder M.
Hoffman John G.
Seeley Elwin W.
Johnston Ervin F.
Phillips Thomas M.
Sciascia Richard S.
Strecker Gerard R.
The United States of America as represented by the Secretary of
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