US3170112A - Magnetic circuit means and alloy components of constant magnetic permeability therefor - Google Patents
Magnetic circuit means and alloy components of constant magnetic permeability therefor Download PDFInfo
- Publication number
- US3170112A US3170112A US8731A US873160A US3170112A US 3170112 A US3170112 A US 3170112A US 8731 A US8731 A US 8731A US 873160 A US873160 A US 873160A US 3170112 A US3170112 A US 3170112A
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- iron
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- 230000035699 permeability Effects 0.000 title claims description 12
- 229910045601 alloy Inorganic materials 0.000 title description 19
- 239000000956 alloy Substances 0.000 title description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 20
- 229910052742 iron Inorganic materials 0.000 claims description 10
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 9
- 239000010703 silicon Substances 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 229910052804 chromium Inorganic materials 0.000 claims description 8
- 239000011651 chromium Substances 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 7
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 4
- 239000010941 cobalt Substances 0.000 claims description 4
- 229910017052 cobalt Inorganic materials 0.000 claims description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 239000011733 molybdenum Substances 0.000 claims description 4
- 229910000599 Cr alloy Inorganic materials 0.000 claims description 3
- 239000000788 chromium alloy Substances 0.000 claims description 3
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 claims description 3
- 230000006872 improvement Effects 0.000 claims description 3
- 239000000306 component Substances 0.000 description 19
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 8
- 239000012535 impurity Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000004411 aluminium Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/30—Ferrous alloys, e.g. steel alloys containing chromium with cobalt
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
Definitions
- the present invention relates to means wherein at least one alloy component forms part of a magnetic circuit and becomes heated'during functioning of'said means, e.g., where such a component co-operates with a magnetic monitoring means responsive to changes inform or movement of the said component or ai'pa rt .with.iwhich it is associated, and the invention is essentially concerned with alloy, at the expense of its content of iron, and without changing its content of other constituents, a quantity of' 5 and 35%, preferably between .20 and Aktiengesell sible resistivity, and which nevertheless retain the desired alloys for the production of'such components-which shall have a magnetic permeability thatdoes notichange up to temperatures of at least 500 C.
- Components as afores shall have a magnetic permeability thatdoes notichange up to temperatures of at least 500 C.
- this alloy since the Curie point of this alloy is located at approximately 250C. it cannot be used for measurements at more elevated temperatures. Moreover, this alloy is also unsuitable for use at higher temperatures because it tends to form scale.
- chrome alloy containing about 520%, preferably 7-15 chromium 0.5 to 10%, preferably 1 7%, aluminium, 0.2
- the alloy has a magnetic permeability of about 200 gauss/oersted and this remains substantially constantice Patented Feb. 16, 1965 With a view to further extending the temperature range of constant permeability itis also proposed to add to the favourable'magnetic properties This is a specially de sirable result for the application of such alloys to' the purposes taken in view because their resistivityreduces the generationof eddy currents.
- FIGS; land-2 schematically illustrate the permeability change as'a function of temperature and of the field strength
- FIG'; '3" illustrates one way in which the alloy-component attached to 'a shaft
- FIG. 4a diagrammatically illustrate part of a. turbine equipped with the alloy component and co-operative monitoring means and FIG. 5 shows another modification
- FIG..1 representsthe. relationship-between permeability and temperature of an alloy constitutedas proposed by the present invention. ,It will be seen that this interdependence isapproximately linear up to a point: indicated by t
- FIG.-2 schematically represents permeability. .as a function of-field strength H. At a point markedH in the plot the field strength is about .100 moe..
- Thegraph further shows that the three illustrated'curves practically coincide at 'field strengths below this point. The curves diverge slightly when H is exceeded.
- the deviation from the desired linear relationship generally increases with in- I is a curve plotted at atemperacreasing temperature. I ture of 20 0., whereas curve 11 is for 350 0., and curve "IIIfor -500 C v FIG. 3 showsa shaft 1 running in bearings 2.
- This disc is offan alloy consisting of:
- fiand 7 are magnet cores schematically shownas of horseshoe shape. In each case a magnetic flux (alternating field) is generated by a coil, not shown. The magnetic circuits areclosed through disc 4 across the air gaps 8, 9 and 10. The inductance of the magnet cores,
- FIG. 5 two. shafts are shown flanged together at 15.
- the flange itself is used to hold a disc 16 by screw clamping'means 17, the disc being of the aforesaid alloy.
- the rings or discs referred to magnetically serve as armatures of magnetic circuits.
- the running of a turbine for example maybe magnetically monitored continuously, a precaution which is especially necessary or desirable in modern high-speed and high-power turbines.
- the magnetic monitoring means may be associated with externally visual indicating means, but the magnetic means and the associated means form per se no part of the present in vention and need be no further illustrated and may be of conventional pattern, the essence of this invention residing in the material of which the key component, whether it be a disc, ring or the like as specifically mentioned or other normal part of the machine, is produced.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Dispersion Chemistry (AREA)
- Power Engineering (AREA)
- Soft Magnetic Materials (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Description
Feb. 16, 1965 K. BUNGARDT EI'AL 3,170,112
- MAGNETIC CIRCUIT MEANS AND ALLOY COMPONENTS OF CONSTANT MAGNETIC PERMEABILITY THEREFOR Filed Feb. 15, 1960 2 Sheets-Sheet 1 Fig.1
V/ua r Fig.2
Jnvem'ors F 1 1965 K. BUNGARDT ETAL 3,170,112 7 MAGNETIC ,CIRCUIT MEANS AND ALLOY COMPONENTS OF CONSTANT MAGNETIC PERMEABILITY THEREFOR Filed Feb. 15, 1960 2 Sheets-Sheet 2 44/4 ldfilvE NTO R S ATTORNEYS.
United States Patent 3,170,112 MAGNETIC CmCUIT MEANS AND ALLOY COM- PONENTS OF CONSTANT MAGNETICPERI VIEA- BILITY THEREFOR 1 Karl Bungardt and Hermann Dietrich, Krefeld, Germany,
assignor's to Deutsche Edelstahlwerire schaft, Krefeld, Germany 'Filed Feb. 15, 1960, Ser. N 8,731 Claims priority, application Germany, Feb. 21, 1959, .D30,051 :2 Claims. (Cl. 324-34) The present invention relates to means wherein at least one alloy component forms part of a magnetic circuit and becomes heated'during functioning of'said means, e.g., where such a component co-operates with a magnetic monitoring means responsive to changes inform or movement of the said component or ai'pa rt .with.iwhich it is associated, and the invention is essentially concerned with alloy, at the expense of its content of iron, and without changing its content of other constituents, a quantity of' 5 and 35%, preferably between .20 and Aktiengesell sible resistivity, and which nevertheless retain the desired alloys for the production of'such components-which shall have a magnetic permeability thatdoes notichange up to temperatures of at least 500 C. Components as afores'aid 'are required'for instance in' the determination of relative changes in length, eccentricities, and the like of v shafts or other rotating parts in machines for example, steam or gas turbines, internal combustion engines, and
so forth. In recent years the performance of such measj Iur'ements has become a matter of increasing importance i in the operational control of turbines. The ,measure-'' ments are based upon thedetermination of certainma'g netic properties, of materials built intothemachines which it is desired to monitor.' Consequently, the performance of such measurements depends'upon the availability of a material which does not lose itsmagnetic properties at the elevated. temperatures at which the measurements A must be performed, and which at these temperature levels v is non-scaling, heat resistant, as wellas corrosion-resistant.
In known methods of performing such measurements which have in the past been restricted t the low tempera- Y ture range, not exceeding' approximately 200 C., the. 'material employed for the'purpose in question has been.
an iron-nickel alloy containing 36% nickel. However,
since the Curie point of this alloy is located at approximately 250C. it cannot be used for measurements at more elevated temperatures. Moreover, this alloy is also unsuitable for use at higher temperatures because it tends to form scale.
Unexpectedly it has now been found that an iron:
chrome alloy containing about 520%, preferably 7-15 chromium 0.5 to 10%, preferably 1 7%, aluminium, 0.2
to 3%, preferably 0.5 to 2%, silicon, up to 0.2% carbon, remainder iron, with the usual impurities of manganese, sulphur, and phosphorus which arise in the melting process, is outstandingly suitable for application to the purpose in view. The alloy has a magnetic permeability of about 200 gauss/oersted and this remains substantially constantice Patented Feb. 16, 1965 With a view to further extending the temperature range of constant permeability itis also proposed to add to the favourable'magnetic properties This is a specially de sirable result for the application of such alloys to' the purposes taken in view because their resistivityreduces the generationof eddy currents.
The accompanying graphs FIGS; land-2 schematically illustrate the permeability change as'a function of temperature and of the field strength; FIG'; '3""illustrates one way in which the alloy-component attached to 'a shaft,
location of this point the approximately 500 C, temperature level is shown at t co-operates with magnetic monitoring means. FIGS. 4
and 4a diagrammatically illustrate part of a. turbine equipped with the alloy component and co-operative monitoring means and FIG. 5 shows another modification,
1 1 FIG..1 representsthe. relationship-between permeability and temperature of an alloy constitutedas proposed by the present invention. ,It will be seen that this interdependence isapproximately linear up to a point: indicated by t In order to give'a rough idea of theactual FIG.-2 schematically represents permeability. .as a function of-field strength H. At a point markedH in the plot the field strength is about .100 moe.. Thegraph further shows that the three illustrated'curves practically coincide at 'field strengths below this point. The curves diverge slightly when H is exceeded. The deviation from the desired linear relationship generally increases with in- I is a curve plotted at atemperacreasing temperature. I ture of 20 0., whereas curve 11 is for 350 0., and curve "IIIfor -500 C v FIG. 3 showsa shaft 1 running in bearings 2. ex-
a disc 4.
tension 3 of reduced-diameter of the'sha-ftcarries This disc is offan alloy consisting of:
. Percent Chromium 12.50 Aluminium 1.00 Silicon 0.95 Carbon 0.17
The remainder iron with the usual impurities of mangav nese, sulphur and phosphorus which arise in the melting within the temperature range between 0 and 500 C. and
it can besuccessfully used at temperatures above 250 C. Nor does this value change when the field strength increases, atyleast below 100 moe. Owing to its content of aluminium and silicon the proposed alloy forms no scale at the temperatures in question; As a result of 'creep resistance of the alloy partor all of the aluminium may be replaced by corresponding quantities of molybdenum and/or tungsten. This substitution does notatfectthe characteristic magnetic properties of the'alloy.
of hot and cold deform As will be readily understood from thefigure, the disc revolves with the shaft and therefore participates in every oscillation or other movement performed bythe shaft." At 5, fiand 7 are magnet cores schematically shownas of horseshoe shape. In each case a magnetic flux (alternating field) is generated by a coil, not shown. The magnetic circuits areclosed through disc 4 across the air gaps 8, 9 and 10. The inductance of the magnet cores,
which function as transmitters, changes when the widths e of gaps 8, 9 and lochange. This means that the changes in the inductance of the cores reflect oscillations for example, of the revolving shaft '1. Since the shaft, which may be the shaft of a turbine, runs in a steam atmosphere having'a temperature of about 500 C. the material of disc 4'is likewise exposed to this temperature and to the. J corrosive attack occasioned thereby, but the discmade of U on its revolving components 11 carries the rings 12 and.
13 which are of the aforesaid alloy. These rings are secured by screws l dwhich engage the revolving components 11.
In FIG. 5, two. shafts are shown flanged together at 15. The flange itself is used to hold a disc 16 by screw clamping'means 17, the disc being of the aforesaid alloy.
The rings or discs referred to magnetically serve as armatures of magnetic circuits.
By means of the invention the running of a turbine for example maybe magnetically monitored continuously, a precaution which is especially necessary or desirable in modern high-speed and high-power turbines. .The magnetic monitoring means may be associated with externally visual indicating means, but the magnetic means and the associated means form per se no part of the present in vention and need be no further illustrated and may be of conventional pattern, the essence of this invention residing in the material of which the key component, whether it be a disc, ring or the like as specifically mentioned or other normal part of the machine, is produced.
Examples of other suitable alloys that will serve are:
, Percent Chromium Q. 12.00 Molybdenum 2.00 Silicon 1.00 Carbon 0.15 the rest being iron with impurities as aforesaid Percent Chromium 13.00 Tungsten 3.00 Silicon 0.80 Carbon 0.12
the rest being iron with impurities as aforesaid.
Percent Chromium 12.50 luminium 1.05 Silicon 0.95 Carbon 0.02 Cobalt 22.00
the rest being iron with impurities as aforesaid.
What we claim is:
1. In a machine incorporating at least one component carried by a rotatable part of the said machine which becomes heated in the functioning of the machine and magnetic monitoring means co-operating with said component and responsive to changes in form or movement which take place in said part during its rotation, the improvement which consists in that the said component comprises an iron-chromium alloy consisting essentially of 5.0 to 20.0% chromium, 0.5 to 10.0% of aluminum, 0.2 to 3.0% silicon, 0 to 35% cobalt, up to 0.2% carbon, and the remainder iron, the said component having a permeability which remains constant up to a temperature of at least 500 C. and at field strengths up to at least- 100 moe. and which is non-scale-forming at said temperatures. i a
2. In a machine incorporating at least one component carried by a rotatable part of the said machine which becomes heated in the functioning of the machine and magnetic monitoring means co-operating with said component I and responsive to changes in form or movement which take place in said part during its rotation, the improvement which consists in thatthe said component comprises an iron-chromium alloy consisting essentially of 5.0 to 20.0% chromium, 0.5 to 10% in total of at least oneof the elements selected from the group consisting of aluminum, molybdenum'and tungsten, 0.2 to 3.0% silicon, 0 to 35% cobalt, up to 0.2% carbon, and the remainder iron, the said component having a permeability which remains constant up to a temperature of at least 500 C. and at field strength up to at least 100 moe. and which is non-sc'ale-forming at said temperatures.
References Cited by the Examiner UNITED STATES PATENTS 1,338,134 4/20 Honda.
1,763,421 6/30 De Vries.
2,864,997 12/58 Von Basel 32434 2,932,568 4/60 Kt gerise et al. i 126 X LLOYD MCCOLLUM, SAMUEL BERNSTEIN,
- Examiners.
Claims (1)
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
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DED30051A DE1240672B (en) | 1959-02-21 | 1959-02-21 | Use of an iron-chromium alloy for the production of objects with temperature-independent magnetic permeability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3170112A true US3170112A (en) | 1965-02-16 |
Family
ID=7040344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US8731A Expired - Lifetime US3170112A (en) | 1959-02-21 | 1960-02-15 | Magnetic circuit means and alloy components of constant magnetic permeability therefor |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3170112A (en) |
| CH (1) | CH397254A (en) |
| DE (1) | DE1240672B (en) |
| FR (1) | FR1241397A (en) |
| GB (1) | GB900701A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3800631A (en) * | 1972-05-11 | 1974-04-02 | Gen Electric | Fe Al Cr Y Co ALLOY |
| JPS511986B1 (en) * | 1967-12-16 | 1976-01-22 | ||
| US3954519A (en) * | 1974-05-02 | 1976-05-04 | Inoue-Japax Research Inc. | Iron-chromium-cobalt spinodal decomposition-type magnetic alloy comprising niobium and/or tantalum |
| US4337100A (en) * | 1980-10-06 | 1982-06-29 | Bell Telephone Laboratories, Incorporated | Magnetically anisotropic alloys for magnetically actuated devices |
| US4401483A (en) * | 1980-10-06 | 1983-08-30 | Bell Telephone Laboratories, Incorporated | Method for making a magnetically anisotropic element |
| US4420732A (en) * | 1980-10-06 | 1983-12-13 | Bell Telephone Laboratories, Incorporated | Magnetically actuated device comprising a magnetically anisotropic element |
| US5198763A (en) * | 1990-02-20 | 1993-03-30 | Nikkiso Co., Ltd. | Apparatus for monitoring the axial and radial wear on a bearing of a rotary shaft |
| US5925951A (en) * | 1998-06-19 | 1999-07-20 | Sundstrand Fluid Handling Corporation | Electromagnetic shield for an electric motor |
| US5955880A (en) * | 1996-12-05 | 1999-09-21 | Beam; Palmer H. | Sealless pump rotor position and bearing monitor |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0028213A1 (en) * | 1979-10-25 | 1981-05-06 | S.A. Floridienne N.V. | Metal alloys |
| SE8207507D0 (en) * | 1982-12-30 | 1982-12-30 | Bulten Kanthal Ab | FLAMSKOLD |
| US5091024A (en) * | 1989-07-13 | 1992-02-25 | Carpenter Technology Corporation | Corrosion resistant, magnetic alloy article |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1338134A (en) * | 1917-10-22 | 1920-04-27 | Sumitomo Chukosho Ltd | Magnet-steel |
| US1763421A (en) * | 1926-01-20 | 1930-06-10 | Vries Ralph P De | Stable-surface alloy steel |
| US2864997A (en) * | 1954-09-11 | 1958-12-16 | Philips Corp | Measuring device |
| US2932568A (en) * | 1958-05-13 | 1960-04-12 | Carpenter Steel Co | High temperature alloy steel with improved room temperature properties |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB280537A (en) * | 1926-11-09 | 1928-03-22 | British Thomson Houston Co Ltd | Improvements in and relating to alloys |
| GB272788A (en) * | 1927-01-03 | 1927-06-23 | Yoshiatsu Kamishima | Alloy of high specific electrical resistance unoxidizable at a high temperature |
| GB296137A (en) * | 1927-04-30 | 1928-08-30 | Willoughby Statham Smith | Improved magnetic alloys |
| DE731409C (en) * | 1939-02-01 | 1943-02-09 | Krupp Ag | Use of iron-chromium alloys for objects subject to magnetic stress |
| DE737312C (en) * | 1940-04-26 | 1943-07-12 | Krupp Ag | Iron-chrome-aluminum alloys for objects subject to magnetic stress |
| DE911139C (en) * | 1943-01-17 | 1954-05-10 | Siemens Ag | Iron alloy with a low and adjustable temperature coefficient of permeability |
-
1959
- 1959-02-21 DE DED30051A patent/DE1240672B/en active Pending
- 1959-11-13 CH CH8060059A patent/CH397254A/en unknown
- 1959-11-17 FR FR810343A patent/FR1241397A/en not_active Expired
-
1960
- 1960-02-15 US US8731A patent/US3170112A/en not_active Expired - Lifetime
- 1960-02-18 GB GB5866/60A patent/GB900701A/en not_active Expired
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1338134A (en) * | 1917-10-22 | 1920-04-27 | Sumitomo Chukosho Ltd | Magnet-steel |
| US1763421A (en) * | 1926-01-20 | 1930-06-10 | Vries Ralph P De | Stable-surface alloy steel |
| US2864997A (en) * | 1954-09-11 | 1958-12-16 | Philips Corp | Measuring device |
| US2932568A (en) * | 1958-05-13 | 1960-04-12 | Carpenter Steel Co | High temperature alloy steel with improved room temperature properties |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS511986B1 (en) * | 1967-12-16 | 1976-01-22 | ||
| US3800631A (en) * | 1972-05-11 | 1974-04-02 | Gen Electric | Fe Al Cr Y Co ALLOY |
| US3954519A (en) * | 1974-05-02 | 1976-05-04 | Inoue-Japax Research Inc. | Iron-chromium-cobalt spinodal decomposition-type magnetic alloy comprising niobium and/or tantalum |
| US4337100A (en) * | 1980-10-06 | 1982-06-29 | Bell Telephone Laboratories, Incorporated | Magnetically anisotropic alloys for magnetically actuated devices |
| US4401483A (en) * | 1980-10-06 | 1983-08-30 | Bell Telephone Laboratories, Incorporated | Method for making a magnetically anisotropic element |
| US4420732A (en) * | 1980-10-06 | 1983-12-13 | Bell Telephone Laboratories, Incorporated | Magnetically actuated device comprising a magnetically anisotropic element |
| US5198763A (en) * | 1990-02-20 | 1993-03-30 | Nikkiso Co., Ltd. | Apparatus for monitoring the axial and radial wear on a bearing of a rotary shaft |
| US5955880A (en) * | 1996-12-05 | 1999-09-21 | Beam; Palmer H. | Sealless pump rotor position and bearing monitor |
| US5925951A (en) * | 1998-06-19 | 1999-07-20 | Sundstrand Fluid Handling Corporation | Electromagnetic shield for an electric motor |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1240672B (en) | 1967-05-18 |
| CH397254A (en) | 1965-08-15 |
| FR1241397A (en) | 1960-09-16 |
| GB900701A (en) | 1962-07-11 |
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