GB782752A - Improvements relating to inspection methods and apparatus - Google Patents

Improvements relating to inspection methods and apparatus

Info

Publication number
GB782752A
GB782752A GB36658/54A GB3665854A GB782752A GB 782752 A GB782752 A GB 782752A GB 36658/54 A GB36658/54 A GB 36658/54A GB 3665854 A GB3665854 A GB 3665854A GB 782752 A GB782752 A GB 782752A
Authority
GB
United Kingdom
Prior art keywords
hose
test
liquid
flaws
drum
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
GB36658/54A
Inventor
Maurice Middleton
William Frederick Stevenson
Douglas Brian Smith
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.)
UK Atomic Energy Authority
Rolls Royce PLC
Original Assignee
UK Atomic Energy Authority
Rolls Royce 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 UK Atomic Energy Authority, Rolls Royce PLC filed Critical UK Atomic Energy Authority
Priority to GB36658/54A priority Critical patent/GB782752A/en
Publication of GB782752A publication Critical patent/GB782752A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00Investigating 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
    • G01N23/02Investigating 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 transmitting the radiation through the material
    • G01N23/06Investigating 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 transmitting the radiation through the material and measuring the absorption
    • G01N23/18Investigating the presence of flaws defects or foreign matter

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Measurement Of Radiation (AREA)

Abstract

782,752. Flaw detection by nuclear radiation. ROLLS-ROYCE, Ltd., and UNITED KING- DOM ATOMIC ENERGY AUTHORITY. Dec. 19, 1955[Dec. 17, 1954] No. 36658/54. Class 40(3). In order to test a flexible hose, made, for example, of rubber, for cracks or flaws the hose is filled with liquid containing a radio-active isotope in solution and under pressure, it is then emptied, rinsed and moved past a radiation sensing device to detect any parts having abnormal radio-activity. A suitable isotope combination is cerium 144-praseodymium 144 and the test solution may be made up in the proportions of 7 millicuries of this in 200 c.c.s. of redistilled water containing a minimum of 20 micrograms per c.c. of inactive cerium and praseodymium as carriers. Apparatus for effecting the test may comprise a drum 11 on which the hose 10 can be mounted with its ends connected by tubes 12 and 13 to mechanically coupled rotary valves 14 and 15. These valves are coupled to a reservoir 28 for the test liquid, a pump 36, a source of water 30, and a drain pipe 38. They have four positions : in the first the pump forces test liquid through the hose, in the second the pump continues to force in liquid but the far end of the hose is closed by a pressure gauge so that the required pressure is reached inside the hose; in the third valve position both ends of the hose are opened to drain the test liquid back into the reservoir 28, and in the fourth water from source 30 is allowed to flow through the hose to the drain to rinse it. The hose now has a small residual radioactivity and greater activity at any points where cracks or flaws retain some of the test liquid. To locate such flaws the hose is wound slowly from drum 11 past a test position to a further drum. At the test position the hose 10 passes through an array of geiger-muller tubes 42 the output of which is fed through a cathode-follower circuit CF to a rate-measuring circuit RM. The circuit R.M. feeds a potentiometer recording apparatus P continuously recording the level of radiation emission on a paper chart and also a solenoid operating a marking pen. The pen may either be arranged to mark continuously except when the emission exceeds a certain value or to mark only when such emission occurs. In either case the defective portions, if any, of the hose can readily be located.
GB36658/54A 1954-12-17 1954-12-17 Improvements relating to inspection methods and apparatus Expired GB782752A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB36658/54A GB782752A (en) 1954-12-17 1954-12-17 Improvements relating to inspection methods and apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB36658/54A GB782752A (en) 1954-12-17 1954-12-17 Improvements relating to inspection methods and apparatus

Publications (1)

Publication Number Publication Date
GB782752A true GB782752A (en) 1957-09-11

Family

ID=10390093

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36658/54A Expired GB782752A (en) 1954-12-17 1954-12-17 Improvements relating to inspection methods and apparatus

Country Status (1)

Country Link
GB (1) GB782752A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1135682B (en) * 1959-11-10 1962-08-30 Cons Electrodynamics Corp Method for testing bodies with a closed inner cavity for tightness
US4019379A (en) * 1976-04-12 1977-04-26 Centre Technique Des Industries Mecaniques Pneumatic roughness measurer
CN117169234A (en) * 2023-11-01 2023-12-05 深圳市磐锋精密技术有限公司 Keyboard and keycap defect detection equipment and detection method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1135682B (en) * 1959-11-10 1962-08-30 Cons Electrodynamics Corp Method for testing bodies with a closed inner cavity for tightness
US4019379A (en) * 1976-04-12 1977-04-26 Centre Technique Des Industries Mecaniques Pneumatic roughness measurer
CN117169234A (en) * 2023-11-01 2023-12-05 深圳市磐锋精密技术有限公司 Keyboard and keycap defect detection equipment and detection method thereof
CN117169234B (en) * 2023-11-01 2024-01-05 深圳市磐锋精密技术有限公司 Keyboard and keycap defect detection equipment and detection method thereof

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