GB662169A - Improvements in or relating to apparatus for detecting cracks in metallic structures - Google Patents
Improvements in or relating to apparatus for detecting cracks in metallic structuresInfo
- Publication number
- GB662169A GB662169A GB574549A GB574549A GB662169A GB 662169 A GB662169 A GB 662169A GB 574549 A GB574549 A GB 574549A GB 574549 A GB574549 A GB 574549A GB 662169 A GB662169 A GB 662169A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cylinder
- fluid
- mode
- tray
- supported
- 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
- 239000012530 fluid Substances 0.000 abstract 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 abstract 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical group [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract 2
- 239000006247 magnetic powder Substances 0.000 abstract 2
- 229920002160 Celluloid Polymers 0.000 abstract 1
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 abstract 1
- 230000005294 ferromagnetic effect Effects 0.000 abstract 1
- 230000005291 magnetic effect Effects 0.000 abstract 1
- 239000012188 paraffin wax Substances 0.000 abstract 1
- 239000000843 powder Substances 0.000 abstract 1
- 239000000725 suspension Substances 0.000 abstract 1
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
- G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
- G01N27/84—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields by applying magnetic powder or magnetic ink
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
662,169. Magnetic tests. MINISTER OF SUPPLY. Jan. 18, 1950 [March 2, 1949], No. 5745/49. Class 37. [Also in Group XXXV] Apparatus for detecting flaws in a ferromagnetic cylinder 1, Figs. 1 and 2, comprises a magnet 4, 5, 6 supported in a carriage 12, 13 which is supported by wheels 8, 9, 10, 11 set at an angle so that as the cylinder is rotated, the magnet moves longitudinally of the cylinder; the cylinder is thus magnetically scanned and variations in the local field are detected by any suitable means. In one mode, a tray 14 contains a fluid having a suspension of magnetic powder, so that the cylinder passes through the fluid and the magnetic powder collects along the line of cracks or flaws. A suitable fluid is paraffin or a solution celluloid in acetone, and a suitable powder is iron oxide. In another mode, the tray 14 is replaced by a coil of fine wire, the induced currents being measured. In a final mode, a galvanometer co-operates with an electromagnetic pick-up whose output can be recorded on a cathode-ray oscillograph.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB574549A GB662169A (en) | 1949-03-02 | 1949-03-02 | Improvements in or relating to apparatus for detecting cracks in metallic structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB574549A GB662169A (en) | 1949-03-02 | 1949-03-02 | Improvements in or relating to apparatus for detecting cracks in metallic structures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB662169A true GB662169A (en) | 1951-12-05 |
Family
ID=9801852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB574549A Expired GB662169A (en) | 1949-03-02 | 1949-03-02 | Improvements in or relating to apparatus for detecting cracks in metallic structures |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB662169A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0164057A2 (en) * | 1984-06-08 | 1985-12-11 | Mecapec S.A. | Methods and devices for determining surface defects in a rod-shaped ferromagnetic object |
| CN109110371A (en) * | 2018-07-16 | 2019-01-01 | 重庆钢铁(集团)有限责任公司 | Steel tube flaw detection system discharging portion structure |
-
1949
- 1949-03-02 GB GB574549A patent/GB662169A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0164057A2 (en) * | 1984-06-08 | 1985-12-11 | Mecapec S.A. | Methods and devices for determining surface defects in a rod-shaped ferromagnetic object |
| EP0164057A3 (en) * | 1984-06-08 | 1988-05-04 | Mecapec S.A. | Methods and devices for determining surface defects in a rod-shaped ferromagnetic object |
| CN109110371A (en) * | 2018-07-16 | 2019-01-01 | 重庆钢铁(集团)有限责任公司 | Steel tube flaw detection system discharging portion structure |
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