GB886675A - Improvements relating to the measurement of interlayer spacings between ferrous metal layers - Google Patents
Improvements relating to the measurement of interlayer spacings between ferrous metal layersInfo
- Publication number
- GB886675A GB886675A GB38680/57A GB3868057A GB886675A GB 886675 A GB886675 A GB 886675A GB 38680/57 A GB38680/57 A GB 38680/57A GB 3868057 A GB3868057 A GB 3868057A GB 886675 A GB886675 A GB 886675A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polepieces
- magnetometer
- magnet
- magnetic
- dec
- 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
- 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
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C13/00—Pressure vessels; Containment vessels; Containment in general
- G21C13/02—Details
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/10—Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
886,675. Magnetic tests. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Dec. 10, 1958 [Dec. 12, 1957], No. 38680/57. Class 37. A method of determining the spacing between superposed ferrous plates, particularly in laminated pressure vessels for nuclear reactors, comprises subjecting the outer layer to a magnetic field between two polepieces and determining the field strength about the surface by means of a magnetometer calibrated in terms of interlayer spacing. Fig. 1 shows in elevation apparatus comprising a permanent magnet 2 and two ferromagnetic side limbs 3, 4, terminated in hinged polepieces 3a, 4a. The permanent magnet 2 may be replaced by an electromagnet fed from a stabilized D.C. supply. A magnetometer 8, shown in plan in Fig. 2, is slidable in a slotted brass member 9 and located between and above the polepieces 3a, 4a. The movement is shown in Figs. 3, 4 and comprises a shaft 10 journalled in jewelled bearings 11, and carrying a number of short permanent magnets 15 of the low permeability alloy Silmanal. A hair-spring 13 provides a restoring force so that the magnetic axes of the magnet 15 lie perpendicular to that of the magnet 2. The polepieces 3a, 4a are first applied to the outer steel plate 5, with the magnetic shunt 7 in place. The magnetometer 8 is then moved along the slotted member 9 until its axis is in the pole gap. The shunt 7 is then removed, magnetically saturating the outer plate 5, so that the deflection of the pointer 12 is dependent upon the air gap between the outer and inner plates 5, 6. It is stated that air gaps between 0.01 and 0.1 inches may be determined. Fig. 5 (not shown) relates to an alternative magnetometer movement using a single magnet. Specification 702,021 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB38680/57A GB886675A (en) | 1957-12-12 | 1957-12-12 | Improvements relating to the measurement of interlayer spacings between ferrous metal layers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB38680/57A GB886675A (en) | 1957-12-12 | 1957-12-12 | Improvements relating to the measurement of interlayer spacings between ferrous metal layers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB886675A true GB886675A (en) | 1962-01-10 |
Family
ID=10405005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB38680/57A Expired GB886675A (en) | 1957-12-12 | 1957-12-12 | Improvements relating to the measurement of interlayer spacings between ferrous metal layers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB886675A (en) |
-
1957
- 1957-12-12 GB GB38680/57A patent/GB886675A/en not_active Expired
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