GB599601A - Improvements relating to means for measuring the thickness of non-magnetic coatings on magnetic bases - Google Patents
Improvements relating to means for measuring the thickness of non-magnetic coatings on magnetic basesInfo
- Publication number
- GB599601A GB599601A GB2666045A GB2666045A GB599601A GB 599601 A GB599601 A GB 599601A GB 2666045 A GB2666045 A GB 2666045A GB 2666045 A GB2666045 A GB 2666045A GB 599601 A GB599601 A GB 599601A
- Authority
- GB
- United Kingdom
- Prior art keywords
- probe
- magnetic
- thickness
- magnet
- measuring
- 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
- 239000000523 sample Substances 0.000 abstract 6
- 239000011248 coating agent Substances 0.000 abstract 3
- 238000000576 coating method Methods 0.000 abstract 3
- 239000004793 Polystyrene Substances 0.000 abstract 2
- 229920002223 polystyrene Polymers 0.000 abstract 2
- 206010044696 Tropical spastic paresis Diseases 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
599,601. Thickness-gauges. BIRMING- HAM SMALL ARMS CO., Ltd., and SMYTH, C. N. Oct. 12, 1945, No. 26660. [Class 37] Relates to gauges for measuring the thickness of non-magnetic coatings on magnetic bases wherein the poles of' an A.C. electromagnetic probe are applied to the coating which then forms an air gap in the magnetic circuit formed by the magnet and the base. According to the invention, the probe magnet is embedded in a material, e.g. polystyrene so that the probe may be used in an electrolytic bath without damage to the probe by chemical action. Fig. 1 shows the electromagnet 1, 3, the enclosing polystyrene 5 forming a handle at 7 and providing only a very thin coating over the pole faces 9 so as to have substantially zero effect on the reluctance of the magnetic circuit. The probe is connected in an A.C. bridge circuit, Fig. 2 (not shown), with a similar probe, the poles of which are magnetically connected. The bridge output varies in correspondence with the coating thickness being measured and may be indicated directly on a milliameter actuated through an amplifier. The magnet may function alternatively as a transformer.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB599601A true GB599601A (en) | 1948-03-16 |
Family
ID=1740170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2666045A Expired GB599601A (en) | 1945-10-12 | Improvements relating to means for measuring the thickness of non-magnetic coatings on magnetic bases |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB599601A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3405353A (en) * | 1965-07-21 | 1968-10-08 | Teledictor Ltd | Magnetic thickness gauge using simultaneous constant and ac magnetization |
| US3434046A (en) * | 1965-12-20 | 1969-03-18 | Halliburton Co | Electronic borehole casing collar locator |
| US4764724A (en) * | 1985-05-28 | 1988-08-16 | Zellweger Uster Ltd. | Measuring head for inductive measurement of the thickness of an insulating layer on an electric conductor |
| GB2311615A (en) * | 1996-03-20 | 1997-10-01 | Peter Thomas Ormiston | Measuring the thickness of a coating |
-
1945
- 1945-10-12 GB GB2666045A patent/GB599601A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3405353A (en) * | 1965-07-21 | 1968-10-08 | Teledictor Ltd | Magnetic thickness gauge using simultaneous constant and ac magnetization |
| US3434046A (en) * | 1965-12-20 | 1969-03-18 | Halliburton Co | Electronic borehole casing collar locator |
| US4764724A (en) * | 1985-05-28 | 1988-08-16 | Zellweger Uster Ltd. | Measuring head for inductive measurement of the thickness of an insulating layer on an electric conductor |
| GB2311615A (en) * | 1996-03-20 | 1997-10-01 | Peter Thomas Ormiston | Measuring the thickness of a coating |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1066517A (en) | Static and dynamic magnetic reaction testing apparatus | |
| ATE37088T1 (en) | MEASURING DEVICE FOR CONTACTLESS MEASUREMENT OF LARGE THICKNESS METALLIC MATERIALS ABOVE THE CURIE TEMPERATURE. | |
| GB599601A (en) | Improvements relating to means for measuring the thickness of non-magnetic coatings on magnetic bases | |
| GB936015A (en) | Improvements in or relating to apparatus for testing of ferro-magnetic material | |
| GB671198A (en) | Improvements in and relating to hall plate apparatus for measuring or controlling unidirectional currents | |
| GB601490A (en) | Improvements in or relating to apparatus for measuring the thickness of non-magneticcoatings on magnetic articles | |
| GB1144538A (en) | Improvements in or relating to devices for measuring the thickness of members of ferromagnetic material | |
| GB828030A (en) | Transducer for measuring pressure or differential pressure | |
| SU73700A1 (en) | Instrument for measuring the force of attraction of permanent magnets | |
| SU131090A1 (en) | Instrument for measuring the thickness of a nonmagnetic coating on a ferromagnetic base | |
| GB589518A (en) | Improvements in and relating to electrical measuring instruments | |
| SU742837A1 (en) | Ferroprobe magnetometer | |
| GB695425A (en) | Fluid flow meter | |
| SU813340A1 (en) | Device for measuring field strength | |
| GB836116A (en) | Improvements in and relating to electro-magnetic systems for measuring or indicatingclearances between relatively movable parts | |
| JPS5273780A (en) | Stress measuring device | |
| SU100739A1 (en) | Method of magnetizing bipolar permanent magnets | |
| SU456574A1 (en) | Electromagnetoacoustic converter | |
| GB817553A (en) | Improvements in or relating to methods for measuring magnetic fields | |
| ES237665A1 (en) | An electromagnetic tensometer device (Machine-translation by Google Translate, not legally binding) | |
| SU144546A1 (en) | Magnetometer | |
| SU84572A2 (en) | Device for determining the magnetic properties of various materials | |
| SU699458A2 (en) | Device for testing specimens of magnetically-hard materials and permanent magnets | |
| GB515221A (en) | Magnetic gauge | |
| GB645777A (en) | Improvements in or relating to apparatus for measuring the thickness of non-magneticcoatings on magnetic materials |