Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1980-02-12
1983-06-07
Strecker, Gerard R.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
264 402, 324 54, 425169, G01R 3102, G01R 3112, B29F 310
Patent
active
043873367
ABSTRACT:
Disclosed is an apparatus and method for continuously detecting skips, protrusions, protuberances and other defects in cable conductor shield, comprising a high voltage electrode, a capacitance bridge filter circuit and a corona discharge detector. A noncontacting coaxial electrode is employed to create an electric field between the cable conductor and the electrode. In the presence of this field, defects in the shield produce corona discharges. A detection circuit employing a capacitance bridge is employed to continuously detect corona discharges and produce signals used for subsequently locating the positions of the defects on the finished cable.
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Joy Edward B.
Meliopoulos Athanasios P.
Webb Roger P.
Hanegan Herbert M.
Linne R. Steven
Southwire Company
Strecker Gerard R.
Tate Stanley L.
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