Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1975-08-12
1977-03-22
Strecker, Gerard R.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
G01R 3108, G01R 3111
Patent
active
040139484
ABSTRACT:
The distance from the end of the cable to the dielectric weak point of said cable is measured by applying a D.C. high voltage to said cable and generating a discharge at the dielectric weak point, obtaining a pair of pulse signals one by differentiating a surge signal generated and the other reflected at said dielectric weak point, limiting the amplitude of said pair of pulse signals, and measuring the interval between said pair of pulse signals.
REFERENCES:
patent: 2717992 (1955-09-01), Weintraub
patent: 3609533 (1971-09-01), Pardis
patent: 3670240 (1972-06-01), Maranchak et al.
Oguchi Munesuke
Tanaka Shigenobu
Yasuhara Hikaru
Strecker Gerard R.
The Fujikura Cable Works Ltd.
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