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Title: NON-DESTRUCTIVE FLAW DETECTION APPARATUS

Abstract

An apparatus is described for the non-destructive detection of flaws in electrical conducting articles. The particular feature of the detection apparatus is that a flaw in the front or back of the test article will not be masked by signals caused by the passage of the end and front of the article through the detection apparatus. The present invention alleviates the above problem by mounting detection coils on directly opposite sides of the test passageway so that the axes of the pickup coils are perpendicular to the axis of an energizing coil through which the article is passed. A flaw in the article will cause a change in the voltage induced in one pickup coil, but passage of the end or front of the article will not produce unequal signals. The signals are compared in appropriate electrical circuitry to actuate a recorder only when unequal signals are present, indicating the presence of a flaw.

Inventors:
;
Issue Date:
OSTI Identifier:
4333529
Patent Number(s):
2817060
Assignee:
U.S. Atomic Energy Cimmission
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
NSA Number:
NSA-12-007033
Resource Type:
Patent
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-58
Country of Publication:
United States
Language:
English
Subject:
PATENTS; COILS; DEFECTS; ELECTRIC CONDUCTIVITY; ELECTRIC POTENTIAL; ELECTRONIC EQUIPMENT; INSTRUMENTS; OPERATION; PATENT; PULSES; RECORDING SYSTEMS

Citation Formats

Stateman, M J, and Holloway, H R. NON-DESTRUCTIVE FLAW DETECTION APPARATUS. United States: N. p., 1957. Web.
Stateman, M J, & Holloway, H R. NON-DESTRUCTIVE FLAW DETECTION APPARATUS. United States.
Stateman, M J, and Holloway, H R. Tue . "NON-DESTRUCTIVE FLAW DETECTION APPARATUS". United States.
@article{osti_4333529,
title = {NON-DESTRUCTIVE FLAW DETECTION APPARATUS},
author = {Stateman, M J and Holloway, H R},
abstractNote = {An apparatus is described for the non-destructive detection of flaws in electrical conducting articles. The particular feature of the detection apparatus is that a flaw in the front or back of the test article will not be masked by signals caused by the passage of the end and front of the article through the detection apparatus. The present invention alleviates the above problem by mounting detection coils on directly opposite sides of the test passageway so that the axes of the pickup coils are perpendicular to the axis of an energizing coil through which the article is passed. A flaw in the article will cause a change in the voltage induced in one pickup coil, but passage of the end or front of the article will not produce unequal signals. The signals are compared in appropriate electrical circuitry to actuate a recorder only when unequal signals are present, indicating the presence of a flaw.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1957},
month = {12}
}