GB645777A - Improvements in or relating to apparatus for measuring the thickness of non-magneticcoatings on magnetic materials - Google Patents

Improvements in or relating to apparatus for measuring the thickness of non-magneticcoatings on magnetic materials

Info

Publication number
GB645777A
GB645777A GB2060748A GB2060748A GB645777A GB 645777 A GB645777 A GB 645777A GB 2060748 A GB2060748 A GB 2060748A GB 2060748 A GB2060748 A GB 2060748A GB 645777 A GB645777 A GB 645777A
Authority
GB
United Kingdom
Prior art keywords
thickness
magnetic
base
measuring
magneticcoatings
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
GB2060748A
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB2060748A priority Critical patent/GB645777A/en
Publication of GB645777A publication Critical patent/GB645777A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
    • G01B7/10—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance
    • G01B7/105—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance for measuring thickness of coating

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

645,777. Magnetic tests and measurements. GENERAL ELECTRIC CO., Ltd., and MATTHEWS, A. Aug. 4, 1948, No. 20607. [Class 37] In apparatus for measuring the thickness of a non-magnetic coating on a magnetic base of the kind in which the test piece completes the magnetic circuit of a transformer, the magnetic circuit is first completed by an uncoated member of the same material and thickness as the base of the articles to be tested and its permeability is adjusted to bring the output of the transformer to a standard value by varying a direct current in the primary winding 2 or in a separate winding. The instrument 4 connected to the secondary winding may thus be calibrated in thickness since the above procedure compensates for errors due to variations in the thickness and material of the base in different articles tested.
GB2060748A 1948-08-04 1948-08-04 Improvements in or relating to apparatus for measuring the thickness of non-magneticcoatings on magnetic materials Expired GB645777A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2060748A GB645777A (en) 1948-08-04 1948-08-04 Improvements in or relating to apparatus for measuring the thickness of non-magneticcoatings on magnetic materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2060748A GB645777A (en) 1948-08-04 1948-08-04 Improvements in or relating to apparatus for measuring the thickness of non-magneticcoatings on magnetic materials

Publications (1)

Publication Number Publication Date
GB645777A true GB645777A (en) 1950-11-08

Family

ID=10148728

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2060748A Expired GB645777A (en) 1948-08-04 1948-08-04 Improvements in or relating to apparatus for measuring the thickness of non-magneticcoatings on magnetic materials

Country Status (1)

Country Link
GB (1) GB645777A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983001505A1 (en) * 1981-10-14 1983-04-28 Madewell, George, Robison Clad thickness measuring device
EP3495765A1 (en) * 2017-12-07 2019-06-12 Helmut Fischer GmbH Institut für Elektronik und Messtechnik Method and device for measuring the thickness of non-magnetizable layers on a magnetizable base material

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983001505A1 (en) * 1981-10-14 1983-04-28 Madewell, George, Robison Clad thickness measuring device
EP3495765A1 (en) * 2017-12-07 2019-06-12 Helmut Fischer GmbH Institut für Elektronik und Messtechnik Method and device for measuring the thickness of non-magnetizable layers on a magnetizable base material
US10928178B2 (en) 2017-12-07 2021-02-23 Helmut Fischer GmbH Institut für Elektronik und Messtechnik Method and device for measuring the thickness of non-magnetisable layers on a magnetisable base material

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