Electricity: measuring and testing – Conductor identification or location – Inaccessible
Patent
1983-09-26
1985-09-17
Krawczewicz, Stanley T.
Electricity: measuring and testing
Conductor identification or location
Inaccessible
324326, 405161, 405160, G01R 2726
Patent
active
045423342
ABSTRACT:
Inductive coupling of a high-frequency signal into a cable to be detected d tracked in a seawater medium for sensing the relative position of the cable with respect to capacitor plates. The capacitor plates are positioned so that in conjunction with the cable a differential capacitor is formed. Relative movement of the capacitor plates with respect to the position of the cable is used to unbalance a Wheatstone Bridge circuit. The output signal from the bridge circuit is proportional to their displacement and is used to provide a guidance signal to realign the capacitor plates and the cable.
REFERENCES:
patent: 1289418 (1918-12-01), Elmen
patent: 3213360 (1965-10-01), Cook et al.
patent: 3323699 (1967-06-01), Bricker
patent: 3338059 (1967-08-01), Tittle
patent: 3702957 (1972-11-01), Wolfendale
patent: 4220913 (1980-09-01), Howell et al.
patent: 4317079 (1982-02-01), Yamamura et al.
patent: 4338043 (1982-07-01), Biancale et al.
Beers Robert F.
Harvey Jack B.
Krawczewicz Stanley T.
Phillips Thomas M.
St. Amand Joseph M.
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