GB782752A - Improvements relating to inspection methods and apparatus - Google Patents
Improvements relating to inspection methods and apparatusInfo
- 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
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
- G01N23/02—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 transmitting the radiation through the material
- G01N23/06—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 transmitting the radiation through the material and measuring the absorption
- G01N23/18—Investigating 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.
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)
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 |
-
1954
- 1954-12-17 GB GB36658/54A patent/GB782752A/en not_active Expired
Cited By (4)
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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