GB760788A - Improvements in or relating to electrical measuring instruments - Google Patents

Improvements in or relating to electrical measuring instruments

Info

Publication number
GB760788A
GB760788A GB1112952A GB1112952A GB760788A GB 760788 A GB760788 A GB 760788A GB 1112952 A GB1112952 A GB 1112952A GB 1112952 A GB1112952 A GB 1112952A GB 760788 A GB760788 A GB 760788A
Authority
GB
United Kingdom
Prior art keywords
coil
meter
solenoid
screen
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
GB1112952A
Inventor
George William Hartland
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.)
EAST LANCASHIRE CHEMICAL COMPA
Original Assignee
EAST LANCASHIRE CHEMICAL COMPA
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 EAST LANCASHIRE CHEMICAL COMPA filed Critical EAST LANCASHIRE CHEMICAL COMPA
Priority to GB1112952A priority Critical patent/GB760788A/en
Publication of GB760788A publication Critical patent/GB760788A/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
    • 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
    • G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents

Landscapes

  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

760,788. Electric tests. EAST LANCASHIRE CHEMICAL CO., Ltd. April 9, 1953 [May 2, 1952], No. 11129/52. Class 37. Apparatus for e.g. measuring the thickness of a layer of electrically conductive material which may be magnetic or not comprises a, solenoid test head which is placed in contact with the surface to be examined, the change in impedance in the solenoid being indicated by a meter. As shown, the head comprises a coil 19 with a fixed, low-loss iron core 20 which protrudes a short distance beyond the coil 19, the external end being hemispherical, surrounded by a magnetic screen 23 and enclosed in a brass tube 28, the core being centralized in the screen 23 by discs 24, 25 of insulating material. The coil 19 is energized by an H.F. oscillator A via a coaxial cable 16, and is tuned to the oscillator frequency by a parallel condenser 18, the voltage across the parallel circuit being measured by a meter C. The apparatus may also be used for locating flaws, or for comparison of quality of layers of equal thickness.
GB1112952A 1952-05-02 1952-05-02 Improvements in or relating to electrical measuring instruments Expired GB760788A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1112952A GB760788A (en) 1952-05-02 1952-05-02 Improvements in or relating to electrical measuring instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1112952A GB760788A (en) 1952-05-02 1952-05-02 Improvements in or relating to electrical measuring instruments

Publications (1)

Publication Number Publication Date
GB760788A true GB760788A (en) 1956-11-07

Family

ID=9980566

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1112952A Expired GB760788A (en) 1952-05-02 1952-05-02 Improvements in or relating to electrical measuring instruments

Country Status (1)

Country Link
GB (1) GB760788A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2165648A (en) * 1984-10-11 1986-04-16 Fischer Gmbh & Co Inst Fur Ele Electro-magnetic measuring probe
US4695797A (en) * 1984-02-10 1987-09-22 Karl Deutsch Pruf- und Messgeratebau GmbH+Co. KG Method of and apparatus for layer thickness measurement
CN108152616A (en) * 2017-12-14 2018-06-12 马鞍山豪远电子有限公司 A kind of device for detecting performance of transformer core, transformer manufacturing system and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4695797A (en) * 1984-02-10 1987-09-22 Karl Deutsch Pruf- und Messgeratebau GmbH+Co. KG Method of and apparatus for layer thickness measurement
GB2165648A (en) * 1984-10-11 1986-04-16 Fischer Gmbh & Co Inst Fur Ele Electro-magnetic measuring probe
CN108152616A (en) * 2017-12-14 2018-06-12 马鞍山豪远电子有限公司 A kind of device for detecting performance of transformer core, transformer manufacturing system and method

Similar Documents

Publication Publication Date Title
GB628170A (en) Apparatus for measuring and testing by supersonic vibrations
US2581394A (en) Method of and apparatus for measuring the thickness of nonconducting coatings or films
Mason Discharge detection and measurements
US1905412A (en) Method of testing
Howard The effect of electric stress on the life of cables incorporating a polythene dielectric
GB760788A (en) Improvements in or relating to electrical measuring instruments
US2916694A (en) Coating thickness gage
Bussey et al. International comparison of dielectric measurements
US2489092A (en) High-frequency surface testing instrument
US4023102A (en) Test fixture
Johnson et al. Ferromagnetism at very high frequencies II. Method of measurement and processes of magnetization
US3315156A (en) Method for determining the electrical resistance of a body of extremely pure semiconductor material for electronic purposes
US3358224A (en) Ferrometer for oscilloscopic measurement of magnetic characteristics of samples of magnetically hard materials
US2448794A (en) Device for testing magnetic materials
US2659857A (en) Instrument for indicating permeability
US2828467A (en) Methods of and devices for determining the magnetic properties of specimens of magnetic material
US2238091A (en) Testing conductive bodies
Stulle et al. Goubau Line Beam Instrumentation Testing the Benefits
US2811690A (en) Method for testing helix pitch
Essen The design, calibration and performance of resonance wavemeters for frequencies between 1,000 and 25,000 Mc/s
US3229195A (en) Apparatus for testing magnetic materials
US2401398A (en) Method of testing insulated conductors
US2425361A (en) Magnetic testing apparatus
Myers The construction of small solenoids for the production of intense magnetic fields
Brooks The electric strength of air between concentric cylinders: a new determination with the corona voltmeter