Method and apparatus for defect inspection of liquid-filled insu

Details Method and apparatus for defect inspection of liquid-filled insu Method and apparatus for defect inspection of liquid-filled insu

1977-04-07

1978-11-14

Strecker, Gerard R.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 71R, G01R 3112, G01N 2760

Patent

active

041258053

ABSTRACT:
The present invention is a defect inspection method and apparatus for electrically inspecting for the presence of defects in sealed containers of insulating material containing electrically conductive electrolyte or nonelectrolyte fluids, in which the container to be inspected is charged by a high DC voltage to detect the charging current developed and the current neutralizing the charging current for detecting the presence of faults in the container through the magnitudes and the shapes of these currents which are compared with reference values.

REFERENCES:
patent: 2701336 (1955-02-01), Anderson
patent: 3234462 (1966-02-01), Holdsworth
patent: 3321703 (1967-05-01), Tyszewicz
patent: 3358378 (1967-12-01), Downs
patent: 3443224 (1969-05-01), Kramer et al.
patent: 3611122 (1971-10-01), Pahl
patent: 3639831 (1972-02-01), Cushman
patent: 3866114 (1975-02-01), Johnston
patent: 3919635 (1975-11-01), Bowen et al.

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