GB1237864A - Examination of specimens of ferromagnetic materials - Google Patents

Examination of specimens of ferromagnetic materials

Info

Publication number
GB1237864A
GB1237864A GB1519168A GB1519168A GB1237864A GB 1237864 A GB1237864 A GB 1237864A GB 1519168 A GB1519168 A GB 1519168A GB 1519168 A GB1519168 A GB 1519168A GB 1237864 A GB1237864 A GB 1237864A
Authority
GB
United Kingdom
Prior art keywords
specimen
sheet
recording
record
magnetic
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
Application number
GB1519168A
Inventor
Donald Birchon
Peter Maurice Wingfield
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to FR1603451D priority Critical patent/FR1603451A/fr
Priority to DE19681766972 priority patent/DE1766972A1/en
Publication of GB1237864A publication Critical patent/GB1237864A/en
Expired legal-status Critical Current

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
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/10—Plotting field distribution ; Measuring field distribution

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Electrochemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)

Abstract

1,237,864. Magnetographic recording. NATIONAL RESEARCH DEVELOPMENT CORP. Aug.14, 1968 [Aug.22, 1967; March 29, 1968], Nos.38517/67 and 15191/68. Heading G1N. A method of magnetographic flaw testing comprises applying a recording medium to the specimen while it is magnetized and subsequently treating the recording medium to produce a visible record of the pattern of magnetization. A grooved specimen 1 may be rubbed with soap (to facilitate stripping) and covered with a layer 3 of "magnetic sensing paint" followed by a backing 4 of tough vinyl paint, or conventional adhesive tape. The specimen is magnetized in any convenient manner and the recording sheet removed, flattened, and treated with magnetic ink which is fixed by lacquer. Alternatively the magnetic ink may be applied to the backing layer 4 while it is on the specimen. In another embodiment Fig. 3, portable apparatus for testing e.g. a railway track comprises an electromagnet 8 with a resilient pad 13 mounted between the poles carrying the recording sheet 14. (This sheet may be formed by painting a sheet of glass and stripping when dry). The electromagnet is energized by a pulse from a capacitor mounted in the handle together with charging batteries. The recording sheet is then inked and pressed on absorbent paper to produce a permanent record, after which the magnetic record may be erased leaving the apparatus ready for further use.
GB1519168A 1967-08-22 1967-08-22 Examination of specimens of ferromagnetic materials Expired GB1237864A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR1603451D FR1603451A (en) 1968-03-29 1968-08-20
DE19681766972 DE1766972A1 (en) 1967-08-22 1968-08-22 Method for testing samples of a ferromagnetic material and device for carrying out the method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3851767 1967-08-22

Publications (1)

Publication Number Publication Date
GB1237864A true GB1237864A (en) 1971-06-30

Family

ID=10403996

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1519168A Expired GB1237864A (en) 1967-08-22 1967-08-22 Examination of specimens of ferromagnetic materials

Country Status (1)

Country Link
GB (1) GB1237864A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845382A (en) * 1972-11-02 1974-10-29 F Forster Method of magnetographic inspection of metal parts using a roll of magnetic tape having an adhesive coating
US3978398A (en) * 1973-11-29 1976-08-31 Rockwell International Corporation Method for nondestructive magnetic inspection of an object employing a putty-like magnetic recording medium
US4063157A (en) * 1976-01-26 1977-12-13 Magnaflux Corporation Magnetic testing device for internal surfaces of pipe using a magnetizing means and expandable magnetizable material within the pipe
GB2119518A (en) * 1982-03-24 1983-11-16 George Victor Crowe Flaw detection method
US4447778A (en) * 1980-07-12 1984-05-08 Institut Dr. Friedrich Forster Prufgeratebau Apparatus for securing storage tape on a test piece during magnetographic testing
DE3626293A1 (en) * 1986-08-02 1988-02-11 Bruss Polt I MAGNETOGRAPHIC TEST METHOD FOR THE GOOD MONITORING OF MATERIALS AND ARRANGEMENT FOR IMPLEMENTING IT
WO2006132934A1 (en) * 2005-06-03 2006-12-14 Imation Corp. Magnetic field sensing device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845382A (en) * 1972-11-02 1974-10-29 F Forster Method of magnetographic inspection of metal parts using a roll of magnetic tape having an adhesive coating
US3978398A (en) * 1973-11-29 1976-08-31 Rockwell International Corporation Method for nondestructive magnetic inspection of an object employing a putty-like magnetic recording medium
US4063157A (en) * 1976-01-26 1977-12-13 Magnaflux Corporation Magnetic testing device for internal surfaces of pipe using a magnetizing means and expandable magnetizable material within the pipe
US4447778A (en) * 1980-07-12 1984-05-08 Institut Dr. Friedrich Forster Prufgeratebau Apparatus for securing storage tape on a test piece during magnetographic testing
GB2119518A (en) * 1982-03-24 1983-11-16 George Victor Crowe Flaw detection method
DE3626293A1 (en) * 1986-08-02 1988-02-11 Bruss Polt I MAGNETOGRAPHIC TEST METHOD FOR THE GOOD MONITORING OF MATERIALS AND ARRANGEMENT FOR IMPLEMENTING IT
WO2006132934A1 (en) * 2005-06-03 2006-12-14 Imation Corp. Magnetic field sensing device

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