GB439324A - Improvements relating to a method of and apparatus for observing the nature of a magnetic field - Google Patents

Improvements relating to a method of and apparatus for observing the nature of a magnetic field

Info

Publication number
GB439324A
GB439324A GB2765934A GB2765934A GB439324A GB 439324 A GB439324 A GB 439324A GB 2765934 A GB2765934 A GB 2765934A GB 2765934 A GB2765934 A GB 2765934A GB 439324 A GB439324 A GB 439324A
Authority
GB
United Kingdom
Prior art keywords
particles
casing
magnetic field
finely divided
tray
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
GB2765934A
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.)
ALAN MARSH ARMOUR
Associated Electrical Industries Ltd
Original Assignee
ALAN MARSH ARMOUR
Associated Electrical Industries Ltd
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 ALAN MARSH ARMOUR, Associated Electrical Industries Ltd filed Critical ALAN MARSH ARMOUR
Priority to GB2765934A priority Critical patent/GB439324A/en
Priority to FR795406D priority patent/FR795406A/en
Publication of GB439324A publication Critical patent/GB439324A/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
    • 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

Abstract

439,324. Magnetic tests. ARMOUR, A. M., 140, Manley Road, Whalley Range, Manchester, and ASSOCIATED ELECTRICAL INDUSTRIES, Ltd., Crown House, Aldwych, London. Sept. 26, 1934, No. 27659. [Class 37] A container which may consist of a flat or curved tray or a tubular casing is filled with a liquid, for example, paraffin in which finely divided magnetic particles are suspended, the tray or casing having a transparent top and an inner surface against which the distribution of the particles can be observed. A brass casing 4 contains finely divided iron or nickel powder 3 in suspension and is closed by a ring 5 containing a glass cover 6. Observation may be effected by a lens. The particles may be subjected to a strong magnetic field before making a test.
GB2765934A 1934-09-26 1934-09-26 Improvements relating to a method of and apparatus for observing the nature of a magnetic field Expired GB439324A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2765934A GB439324A (en) 1934-09-26 1934-09-26 Improvements relating to a method of and apparatus for observing the nature of a magnetic field
FR795406D FR795406A (en) 1934-09-26 1935-09-26 New crack detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2765934A GB439324A (en) 1934-09-26 1934-09-26 Improvements relating to a method of and apparatus for observing the nature of a magnetic field

Publications (1)

Publication Number Publication Date
GB439324A true GB439324A (en) 1935-12-04

Family

ID=10263170

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2765934A Expired GB439324A (en) 1934-09-26 1934-09-26 Improvements relating to a method of and apparatus for observing the nature of a magnetic field

Country Status (2)

Country Link
FR (1) FR795406A (en)
GB (1) GB439324A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2530564A (en) * 1948-06-30 1950-11-21 Rca Corp Editing and inspection of invisible sound tracks
US3013206A (en) * 1958-08-28 1961-12-12 Minnesota Mining & Mfg Magnetic reader
US3293544A (en) * 1964-09-24 1966-12-20 Seng Robert Nail detector utilizing metallic particles
US3320523A (en) * 1965-02-01 1967-05-16 Lyne S Trimble Method for visibly indicating and recording magnetic fields
US4992732A (en) * 1987-07-08 1991-02-12 Magfoil & It Gmbh Method and apparatus for magnetic testing of metallic work pieces

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2530564A (en) * 1948-06-30 1950-11-21 Rca Corp Editing and inspection of invisible sound tracks
US3013206A (en) * 1958-08-28 1961-12-12 Minnesota Mining & Mfg Magnetic reader
US3293544A (en) * 1964-09-24 1966-12-20 Seng Robert Nail detector utilizing metallic particles
US3320523A (en) * 1965-02-01 1967-05-16 Lyne S Trimble Method for visibly indicating and recording magnetic fields
US4992732A (en) * 1987-07-08 1991-02-12 Magfoil & It Gmbh Method and apparatus for magnetic testing of metallic work pieces

Also Published As

Publication number Publication date
FR795406A (en) 1936-03-13

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