Electricity: measuring and testing – Conductor identification or location – Inaccessible
Patent
1976-11-19
1979-08-28
Krawczewicz, Stanley T.
Electricity: measuring and testing
Conductor identification or location
Inaccessible
324 64, 340605, G01R 2702
Patent
active
041662440
ABSTRACT:
A combination of elements for detecting leakage of electrically conductive fluids from tanks, including a reference electrode, an AC generator connected between the tank and the reference electrode, and one or more sensing electrodes positioned between the tank and the reference electrode. The storage tank and reference electrode are in contact with the ground. When the AC generator is energized, current flows in the circuit, and creates an electric field in the ground between the tank and the reference electrode. The sensing electrodes are positioned so that they are within the electric field when the AC generator is energized. An electric potential measuring device, such as a voltmeter, is used to measure the electric potential at the sensing electrodes relative to the tank. A significant change in the electric potential at any one or more of the sensing electrodes is an indication that a leak has occurred in the tank.
REFERENCES:
patent: 2123545 (1938-07-01), Pearson
patent: 2141590 (1938-12-01), Blondeau
patent: 3331021 (1967-07-01), Marsh et al.
patent: 3339138 (1967-08-01), Baker et al.
patent: 3453151 (1969-07-01), Fox
Eul William A.
Woods Weightstill W.
Krawczewicz Stanley T.
The Boeing Company
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