GB600914A - Improvements in or relating to apparatus for testing and examining metals - Google Patents

Improvements in or relating to apparatus for testing and examining metals

Info

Publication number
GB600914A
GB600914A GB11644/44A GB1164444A GB600914A GB 600914 A GB600914 A GB 600914A GB 11644/44 A GB11644/44 A GB 11644/44A GB 1164444 A GB1164444 A GB 1164444A GB 600914 A GB600914 A GB 600914A
Authority
GB
United Kingdom
Prior art keywords
coil
specimen
core
high frequency
frequency
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
GB11644/44A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables 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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB600914A publication Critical patent/GB600914A/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
    • G01N27/80—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating mechanical hardness, e.g. by investigating saturation or remanence of ferromagnetic material
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Measuring Magnetic Variables (AREA)

Abstract

600,914. Magnetic tests. STANDARD TELEPHONES & CABLES, Ltd. June 19, 1944, No. 11644. Convention date, Sept. 16, 1943. [Class 37] In a device for testing metals, specimen pieces are used as the core of a coil, the core losses of the specimens being determined for different frequencies. In Fig. 1, a high frequency oscillator consisting of valves 14, 15 and the associated components has a number of condensers 6 and a coil 5 in the tank circuit. A. source of low frequency is connected to the primary 2 of a transformer, the secondary 3 of which is connected to a coil 4, which is aligned with the coil 5 so that the high frequency oscillator is modulated by the low frequency. The frequency of the main oscillator is changed by selecting suitable condensers 6 by means of switch 10. A variable resistance 7 is included in the tank circuit, and a switch 10 is connected to the slider 11, which is earthed. One of the vertical deflection platesof an oscillograph 26 is coupled through condenser 25 to the anode of valve 14, the other vertical deflection plate being grounded. The horizontal plates are connected in the known manner to give a horizontal deflection of the same frequency as that of generator 1. The specimen to be tested is placed in one or both of coils 4 and 5 so as to change the amount of modulation of the high frequency oscillation which will be shown on oscillograph 26. The greater the core losses in the metal, the greater will be the amount of modulation. The core loss characteristic of the specimen can be obtained by taking readings at different frequencies. Three frequencies, suitably spaced, are usually sufficient to compare the specimens with a standard. Specification 600,913 is referred to.
GB11644/44A 1943-09-16 1944-06-19 Improvements in or relating to apparatus for testing and examining metals Expired GB600914A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US600914XA 1943-09-16 1943-09-16

Publications (1)

Publication Number Publication Date
GB600914A true GB600914A (en) 1948-04-22

Family

ID=22027283

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11644/44A Expired GB600914A (en) 1943-09-16 1944-06-19 Improvements in or relating to apparatus for testing and examining metals

Country Status (1)

Country Link
GB (1) GB600914A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2022268A (en) * 1978-06-02 1979-12-12 Shibaura Eng Works Ltd Stress measuring apparatus
EP0014729A1 (en) * 1979-02-26 1980-09-03 Sensor Corporation A digital eddy current apparatus for identifying specimens of electrically conductive material of unknown composition

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2022268A (en) * 1978-06-02 1979-12-12 Shibaura Eng Works Ltd Stress measuring apparatus
EP0014729A1 (en) * 1979-02-26 1980-09-03 Sensor Corporation A digital eddy current apparatus for identifying specimens of electrically conductive material of unknown composition

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