GB1226698A - - Google Patents
Info
- Publication number
- GB1226698A GB1226698A GB1226698DA GB1226698A GB 1226698 A GB1226698 A GB 1226698A GB 1226698D A GB1226698D A GB 1226698DA GB 1226698 A GB1226698 A GB 1226698A
- Authority
- GB
- United Kingdom
- Prior art keywords
- compensation member
- permanent magnet
- magnet
- magnets
- magnetized
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0205—Magnetic circuits with PM in general
- H01F7/021—Construction of PM
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Hard Magnetic Materials (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
1,226,698. Permanent magnet. M. BAERMANN. 20 Nov., 1969 [20 Nov., 1968], No. 56837/69. Heading H1P. A permanent magnet comprises a flat body formed from powdered permanent magnet material and a binder and magnetized to provide magnetic poles in at least one surface thereof and at least one temperature compensation member of magnetizable material of low Curie Point so arranged on at least one surface of or within the body as to lie within the lines of the magnetic flux whereby to form a magnetic shunt within the body. Two magnets 6 and 7 have a temperature compensation member 4 which has a Curie temperature of 35‹ to 90‹ C. The magnets 6 and 7 are made from oxides of Co, Ba, Pb or Sr together with a binder. In other embodiments a single annular flat magnet is used with the compensation member lying on the surface of the annulus and the magnet magnetized so that both poles lie on a flat side of the annulus and may be either on the opposite side to the compensation member (Fig. 1, not shown) or on the same side (Fig. 5, not shown). In another embodiment (Fig. 2, not shown) the flat side of the magnet away from the compensation member is magnetized to provide outer and inner poles of one polarity, and a middle pole of the other polarity. Another modification (Fig. 4, not shown) uses two permanent magnet members (11, 12) one set within the other and two compensation members (13, 14) set as annular rings between the two magnets.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19681810005 DE1810005A1 (en) | 1968-11-20 | 1968-11-20 | Temperature compensation on permanent magnets with temperature compensation material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1226698A true GB1226698A (en) | 1971-03-31 |
Family
ID=5713883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1226698D Expired GB1226698A (en) | 1968-11-20 | 1969-11-20 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3633138A (en) |
| CH (1) | CH517361A (en) |
| DE (1) | DE1810005A1 (en) |
| FR (1) | FR2023697A1 (en) |
| GB (1) | GB1226698A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5337280Y2 (en) * | 1972-08-30 | 1978-09-09 | ||
| GB1414240A (en) * | 1972-11-20 | 1975-11-19 | Sony Corp | Mislanding corrector for colour television cathode ray tubes |
| US4045738A (en) * | 1976-03-08 | 1977-08-30 | General Electric Company | Variable reluctance speed sensor of integral construction utilizing a shielded high coercive force rare earth magnet positioned directly adjacent the sensing rotating element |
| US5218251A (en) * | 1991-10-28 | 1993-06-08 | Allwine Jr Elmer C | Composite magnet stepper motor |
| US5258735A (en) * | 1991-10-28 | 1993-11-02 | Allwine Jr Elmer C | Multi-pole composite magnet used in a magnetic encoder |
| US5369323A (en) * | 1991-10-28 | 1994-11-29 | Slonix Engineering | Composite magnet stepper motor |
| US5440185A (en) * | 1991-10-28 | 1995-08-08 | Allwine, Jr.; Elmer C. | Composite magnet brushless DC motor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2560260A (en) * | 1949-07-12 | 1951-07-10 | Gen Electric | Temperature compensated magnetic suspension |
| US2906929A (en) * | 1954-05-28 | 1959-09-29 | Gulf Research Development Co | Temperature compensated permanent magnet |
| AT239370B (en) * | 1961-05-30 | 1965-04-12 | Max Baermann | Permanent magnetic bearing, especially for the axial bearing of the rotor shaft of an electricity meter |
| US3315194A (en) * | 1963-08-26 | 1967-04-18 | Canadian Patents Dev | Temperature responsive control means for the magnetic field of a cyclotron |
-
1968
- 1968-11-20 DE DE19681810005 patent/DE1810005A1/en active Pending
-
1969
- 1969-11-17 CH CH1713769A patent/CH517361A/en not_active IP Right Cessation
- 1969-11-18 FR FR6939659A patent/FR2023697A1/fr not_active Withdrawn
- 1969-11-19 US US878248A patent/US3633138A/en not_active Expired - Lifetime
- 1969-11-20 GB GB1226698D patent/GB1226698A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3633138A (en) | 1972-01-04 |
| DE1810005A1 (en) | 1970-06-04 |
| FR2023697A1 (en) | 1970-08-21 |
| CH517361A (en) | 1971-12-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |