GB717753A - Improvements in and relating to thickness gauges employing radioactivity - Google Patents

Improvements in and relating to thickness gauges employing radioactivity

Info

Publication number
GB717753A
GB717753A GB573951A GB573951A GB717753A GB 717753 A GB717753 A GB 717753A GB 573951 A GB573951 A GB 573951A GB 573951 A GB573951 A GB 573951A GB 717753 A GB717753 A GB 717753A
Authority
GB
United Kingdom
Prior art keywords
tubes
tube
radio
tapping
geiger
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
GB573951A
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.)
EDWIN NEWBOULD SHAW
ISOTOPE DEVELOPMENTS Ltd
Original Assignee
EDWIN NEWBOULD SHAW
ISOTOPE DEVELOPMENTS 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 EDWIN NEWBOULD SHAW, ISOTOPE DEVELOPMENTS Ltd filed Critical EDWIN NEWBOULD SHAW
Priority to GB573951A priority Critical patent/GB717753A/en
Publication of GB717753A publication Critical patent/GB717753A/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
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/20—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by using diffraction of the radiation by the materials, e.g. for investigating crystal structure; by using scattering of the radiation by the materials, e.g. for investigating non-crystalline materials; by using reflection of the radiation by the materials
    • G01N23/203—Measuring back scattering

Landscapes

  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (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)
  • Length-Measuring Devices Using Wave Or Particle Radiation (AREA)
  • Measurement Of Radiation (AREA)

Abstract

717,753. Radio-active thickness gauges. ISOTOPE DEVELOPMENTS, Ltd., FEARNSIDE, K., and SHAW, E. N. March 10, 1952 [March 9, 1951], No. 5739/51. Class 40 (3) The thickness of material is measured from one side by detecting the back scattering of a beam of radio-activity directed at an oblique angle to the surface of the material. As shown the radio-active source 19 which may be cobalt 60 is mounted eccentrically in a tube 20 which rests in a hole in a lead block 10. This tube has the effect of collimating the beam. In a larger hole 16 are mounted four Geiger tubes 22 which are thus shie'ded from direct radiation from the source and receive rays scattered from the material One pair of these tubes are at a greater distance from the surface under examination than the other. The four tubes may be replaced by a single detector of the scintillation type. The lead block is supported within a steel casing including a flat bottom plate 11. The Geiger tubes are mounted in brass tubes 23 surrounded by a single larger tube 24 through which cooling water (which may be temperature controlled) is circulated. Variation in the distance of the steel from the gauge is compensated by the fact that as the steel moves towards or away from the gauge the Geiger tubes "see" less or more of the irradiated area. Circuit.-The counter tubes are coupled to a unit 31 which both provides a quenching voltage for the tubes which may be halogen field and produces a constant output pulse for each counter pulse. These pulses are integrated and the direct voltage produced is amplified at 33 and applied to a grid of a pair of cathodes 34, 35 with a commor cathode resistor. The potential of the other grid is determined by a tapping 39 on a potentiometer and between this tapping and a further tapping 42 is mounted a voltmeter 41. By adjusting the set ting of tap 39 the mean cathode current of tube 34, and hence the range of reading of milliameter 38 is determined. Initial adjustments of the voltmeter reading are made with the tap 42 which is then fixed.
GB573951A 1951-03-09 1951-03-09 Improvements in and relating to thickness gauges employing radioactivity Expired GB717753A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB573951A GB717753A (en) 1951-03-09 1951-03-09 Improvements in and relating to thickness gauges employing radioactivity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB573951A GB717753A (en) 1951-03-09 1951-03-09 Improvements in and relating to thickness gauges employing radioactivity

Publications (1)

Publication Number Publication Date
GB717753A true GB717753A (en) 1954-11-03

Family

ID=9801742

Family Applications (1)

Application Number Title Priority Date Filing Date
GB573951A Expired GB717753A (en) 1951-03-09 1951-03-09 Improvements in and relating to thickness gauges employing radioactivity

Country Status (1)

Country Link
GB (1) GB717753A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3099744A (en) * 1959-12-21 1963-07-30 Koppers Co Inc Apparatus for measuring the height and contour of material
US10458834B2 (en) 2012-09-06 2019-10-29 Johnson Matthey Public Limited Company Radiation detector
CN117686939A (en) * 2024-02-02 2024-03-12 宁德时代新能源科技股份有限公司 Battery nickel piece welding quality detection system and battery nickel piece welding quality detection method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3099744A (en) * 1959-12-21 1963-07-30 Koppers Co Inc Apparatus for measuring the height and contour of material
US10458834B2 (en) 2012-09-06 2019-10-29 Johnson Matthey Public Limited Company Radiation detector
CN117686939A (en) * 2024-02-02 2024-03-12 宁德时代新能源科技股份有限公司 Battery nickel piece welding quality detection system and battery nickel piece welding quality detection method

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