Electricity: measuring and testing – Conductor identification or location – Inaccessible
Patent
1992-09-29
1994-11-15
Snow, Walter E.
Electricity: measuring and testing
Conductor identification or location
Inaccessible
324 95, 324109, 324530, G01R 1900, G01V 308, G01V 310, G01N 3102
Patent
active
053651634
ABSTRACT:
A circuit tracer for determinating the location of a conductor, such as a wire, which is either an open or closed circuit, and which may lie underground. The tracer includes a transmitter which is connected to the conductor, a hand-held probe, and a receiver which is connected to the probe. The probe has three different sensors: an electric field sensor, primarily for locating the terminus of an open-ended conductor or for distinguishing such a wire in a bundled cable of wires; a differential electric field sensor, for determining the direction to and location of an open-ended conductor located above ground; and an inductive sensor for determining the direction to and location of a current-carrying conductor, including an open-ended conductor lying below ground. A switch selectively provides the output from one of the sensors to the receiver unit, which determines the magnitude of any signal based upon the direction the probe is pointing. By swinging the probe back and forth, and observing the received signal, the direction to and location of the conductor may be determined.
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3M Brochure on Scotchtrak.TM. Circuit Tracers. Copyright 1990.
Horning Sandra J.
Reisem Daniel E.
Satterwhite James R.
Wyatt Gerald A.
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Musgrove Jack V.
Snow Walter E.
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