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Title: Wire inhomogeneity detector having a core with opposing pole pieces and guide pieces adjacent the opposing pole pieces

Abstract

A device for uncovering imperfections in electrical conducting wire, particularly superconducting wire, by detecting variations in eddy currents. Eddy currents effect the magnetic field in a gap of an inductor, contained in a modified commercial ferrite core, through which the wire being tested is passed. A small increase or decrease in the amount of conductive material, such as copper, in a fixed cross section of wire will unbalance a bridge used to measure the impedance of the inductor, tripping a detector and sounding an alarm.

Inventors:
 [1];  [1];  [2]
  1. (Lafayette, CA)
  2. (El Cerrito, CA)
Issue Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA
OSTI Identifier:
867097
Patent Number(s):
4864236
Assignee:
United States of America as represented by United States (Washington, DC) LBNL
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
wire; inhomogeneity; detector; core; opposing; pole; pieces; guide; adjacent; device; uncovering; imperfections; electrical; conducting; particularly; superconducting; detecting; variations; eddy; currents; effect; magnetic; field; gap; inductor; contained; modified; commercial; ferrite; tested; passed; increase; decrease; amount; conductive; material; copper; fixed; section; unbalance; bridge; measure; impedance; tripping; sounding; alarm; electrical conducting; pole pieces; eddy current; conductive material; magnetic field; superconducting wire; eddy currents; ferrite core; opposing pole; pole piece; conducting wire; detecting variations; /324/

Citation Formats

Gibson, George H., Smits, Robert G., and Eberhard, Philippe H. Wire inhomogeneity detector having a core with opposing pole pieces and guide pieces adjacent the opposing pole pieces. United States: N. p., 1989. Web.
Gibson, George H., Smits, Robert G., & Eberhard, Philippe H. Wire inhomogeneity detector having a core with opposing pole pieces and guide pieces adjacent the opposing pole pieces. United States.
Gibson, George H., Smits, Robert G., and Eberhard, Philippe H. Sun . "Wire inhomogeneity detector having a core with opposing pole pieces and guide pieces adjacent the opposing pole pieces". United States. https://www.osti.gov/servlets/purl/867097.
@article{osti_867097,
title = {Wire inhomogeneity detector having a core with opposing pole pieces and guide pieces adjacent the opposing pole pieces},
author = {Gibson, George H. and Smits, Robert G. and Eberhard, Philippe H.},
abstractNote = {A device for uncovering imperfections in electrical conducting wire, particularly superconducting wire, by detecting variations in eddy currents. Eddy currents effect the magnetic field in a gap of an inductor, contained in a modified commercial ferrite core, through which the wire being tested is passed. A small increase or decrease in the amount of conductive material, such as copper, in a fixed cross section of wire will unbalance a bridge used to measure the impedance of the inductor, tripping a detector and sounding an alarm.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {1}
}

Patent:

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