GB799768A - Apparatus for measuring the thickness of non-magnetic layers on a magnetic base material - Google Patents

Apparatus for measuring the thickness of non-magnetic layers on a magnetic base material

Info

Publication number
GB799768A
GB799768A GB23584/55A GB2358455A GB799768A GB 799768 A GB799768 A GB 799768A GB 23584/55 A GB23584/55 A GB 23584/55A GB 2358455 A GB2358455 A GB 2358455A GB 799768 A GB799768 A GB 799768A
Authority
GB
United Kingdom
Prior art keywords
measuring
thickness
magnet
spring
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
GB23584/55A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB799768A publication Critical patent/GB799768A/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

799,768. Measuring thickness. BINKO, J., BRUNA, V., and SEVCIK, J. Aug. 16, 1955 [Oct. 13, 1954], No. 23584/55. Class 37. Relates to devices for measuring the thickness of non-magnetic layers on magnetic base materials and to such devices wherein the extension of a spring necessary to detach a magnet from a point of contact with the test material indicates coating thickness. In the Figure, rotating a sleeve 9 moves pin 7 along grooves 8 in gauge body 1 so as to extend spring 4 from suspension roller 6 and eventually detach bar magnet 2 from the test coating. A transparent coloured indicator 13 rigidly connected to pin 7 dovetails into groove 14 along outer surface of gauge body 1 and the point of pull-off of magnet 2 is shown by the position of indicator 13 in relation to a coloured scale 15 along the bottom of groove 14. The link 3 between spring 4 and magnet 2 has areas of different colours and the borderline between the two colours disappears at moment of pull off when measuring substantial thicknesses. A sleeve protects the apparatus when not in use.
GB23584/55A 1954-10-13 1955-08-16 Apparatus for measuring the thickness of non-magnetic layers on a magnetic base material Expired GB799768A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS799768X 1954-10-13

Publications (1)

Publication Number Publication Date
GB799768A true GB799768A (en) 1958-08-13

Family

ID=5455598

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23584/55A Expired GB799768A (en) 1954-10-13 1955-08-16 Apparatus for measuring the thickness of non-magnetic layers on a magnetic base material

Country Status (1)

Country Link
GB (1) GB799768A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2180649A (en) * 1985-08-09 1987-04-01 Water Res Centre Detection and measurement of defects in ferrous articles
US5006799A (en) * 1988-12-01 1991-04-09 Pfanstiehl John G Low cost magnetic coating thickness gauge with holding magnet, bias spring and holding force indicator
US5094009A (en) * 1990-10-17 1992-03-10 Defelsko Corporation Gauge for measuring the thickness of a coating on a substrate
CN102927950A (en) * 2012-10-31 2013-02-13 中钢集团邢台机械轧辊有限公司 Automatic thickness measuring device for cold-type coating of roller

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2180649A (en) * 1985-08-09 1987-04-01 Water Res Centre Detection and measurement of defects in ferrous articles
US5006799A (en) * 1988-12-01 1991-04-09 Pfanstiehl John G Low cost magnetic coating thickness gauge with holding magnet, bias spring and holding force indicator
US5094009A (en) * 1990-10-17 1992-03-10 Defelsko Corporation Gauge for measuring the thickness of a coating on a substrate
EP0481334A1 (en) * 1990-10-17 1992-04-22 Defelsko Corporation Gauge for measuring the thickness of a coating on a substrate
CN102927950A (en) * 2012-10-31 2013-02-13 中钢集团邢台机械轧辊有限公司 Automatic thickness measuring device for cold-type coating of roller
CN102927950B (en) * 2012-10-31 2015-07-15 中钢集团邢台机械轧辊有限公司 Automatic thickness measuring device for cold-type coating of roller

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