GB516753A - Improvements in or relating to apparatus for electrically testing conductive articles for defects - Google Patents
Improvements in or relating to apparatus for electrically testing conductive articles for defectsInfo
- Publication number
- GB516753A GB516753A GB2105138A GB2105138A GB516753A GB 516753 A GB516753 A GB 516753A GB 2105138 A GB2105138 A GB 2105138A GB 2105138 A GB2105138 A GB 2105138A GB 516753 A GB516753 A GB 516753A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coils
- flaws
- tested
- periphery
- taken
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/904—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents with two or more sensors
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
516,753. Electric tests. STEVENS, A. H. (Sperry Products, Inc.). July 15, 1938, No. 21051. [Class 37] Metal articles are tested for flaws by applying alternating or pulsating current and providing a number of detector coils disposed around the periphery of the article, the coils receiving induced e.m.f. which shows variations due to flaws. The coils may constitute a helix 16, Fig. 1, closely encircling the metal tube 1 under test, and may have tappings 17 enabling different portions of the periphery to be tested. A single turn 18, Fig. 3, may be taken all round so as to balanceout induced e.m.f. in the absence of the flaws. The detector coils may be disposed inside instead of outside the tube. The coils may be connected to static contact recifiers or thermionic valves in circuit with indicators. In one arrangement, Fig. 15, detector coils 36 are connected respectively to triode rectifiers 37, and comparative readings of normal and varied anode current are taken on meters M<1>, M<2>, M<3>.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2105138A GB516753A (en) | 1938-07-15 | 1938-07-15 | Improvements in or relating to apparatus for electrically testing conductive articles for defects |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2105138A GB516753A (en) | 1938-07-15 | 1938-07-15 | Improvements in or relating to apparatus for electrically testing conductive articles for defects |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB516753A true GB516753A (en) | 1940-01-10 |
Family
ID=10156363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2105138A Expired GB516753A (en) | 1938-07-15 | 1938-07-15 | Improvements in or relating to apparatus for electrically testing conductive articles for defects |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB516753A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2201789A (en) * | 1987-02-19 | 1988-09-07 | Ca Atomic Energy Ltd | Circumferentially compensating eddy current probe |
| WO2013124087A1 (en) * | 2012-02-23 | 2013-08-29 | Institut Dr. Foerster Gmbh & Co. Kg | Through-coil arrangement, test apparatus with through-coil arrangement and testing method |
-
1938
- 1938-07-15 GB GB2105138A patent/GB516753A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2201789A (en) * | 1987-02-19 | 1988-09-07 | Ca Atomic Energy Ltd | Circumferentially compensating eddy current probe |
| GB2201789B (en) * | 1987-02-19 | 1991-10-30 | Ca Atomic Energy Ltd | Circumferentially compensating eddy current probe |
| WO2013124087A1 (en) * | 2012-02-23 | 2013-08-29 | Institut Dr. Foerster Gmbh & Co. Kg | Through-coil arrangement, test apparatus with through-coil arrangement and testing method |
| US9222916B2 (en) | 2012-02-23 | 2015-12-29 | Institut Dr. Foerster Gmbh & Co. Kg | Through-coil arrangement, test apparatus with through-coil arrangement and testing method |
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