GB1454754A - Permanent magnet structure - Google Patents
Permanent magnet structureInfo
- Publication number
- GB1454754A GB1454754A GB4955473A GB4955473A GB1454754A GB 1454754 A GB1454754 A GB 1454754A GB 4955473 A GB4955473 A GB 4955473A GB 4955473 A GB4955473 A GB 4955473A GB 1454754 A GB1454754 A GB 1454754A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnet
- magnets
- permanent
- airgap
- repel
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2321/00—Details of machines, plants or systems, using electric or magnetic effects
- F25B2321/002—Details of machines, plants or systems, using electric or magnetic effects by using magneto-caloric effects
- F25B2321/0023—Details of machines, plants or systems, using electric or magnetic effects by using magneto-caloric effects with modulation, influencing or enhancing an existing magnetic field
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Microwave Tubes (AREA)
- Hard Magnetic Materials (AREA)
Abstract
1454754 Permanent magnets GENERAL ELECTRIC CO 24 Oct 1973 [26 Oct 1972] 49554/73 Heading H1P A cylindrical hollow permanent magnet 10 (Fig. 1) is surrounded at its north and south poles respectively by abutting radially magnetised sleeves 11, 12 oriented to provide exterior and interior surfaces of opposed polarities; the latter polarity being similar to that of the magnet 10 with which it is in contact so as to repel leakage flux from the latter, and thus confine the flux distribution to the sleeve magnet, e.g. in focussing an electron tube. The sleeve may be flexible. In a modification (Fig. 2) a pair of permanent rectangular magnets 13, 14 are connected by a yoke 15 and separated by an airgap. Plural rectangular normally magnetised plates 16, 17, 18 and 21, 22, 23 (Fig. 2), (Fig. 3, not shown) are applied to the surfaces of magnets 13, 14 adjacent the airgap and their contacting surfaces have similar polarities to the respective magnet surfaces to repel leakage flux therefrom. The plates may be of cobalt-rare earth or ferrite magnetic materials.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US30109472A | 1972-10-26 | 1972-10-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1454754A true GB1454754A (en) | 1976-11-03 |
Family
ID=23161919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4955473A Expired GB1454754A (en) | 1972-10-26 | 1973-10-24 | Permanent magnet structure |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US3781736A (en) |
| JP (2) | JPS49132595A (en) |
| DE (1) | DE2347039A1 (en) |
| ES (1) | ES419858A1 (en) |
| FR (1) | FR2204854B1 (en) |
| GB (1) | GB1454754A (en) |
| IT (1) | IT995956B (en) |
| NL (1) | NL7314663A (en) |
| SU (1) | SU824901A3 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0161782A1 (en) * | 1984-04-11 | 1985-11-21 | Sumitomo Special Metal Co., Ltd. | Magnetic field generating device for NMR-CT |
| GB2196855A (en) * | 1986-09-12 | 1988-05-11 | Marubeni Kk | Magnetic therapeutic device |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5158323U (en) * | 1974-10-31 | 1976-05-08 | ||
| CS213709B1 (en) * | 1979-03-13 | 1982-04-09 | Vaclav Landa | Anizotropous permanent magnets |
| US4359706A (en) * | 1979-12-18 | 1982-11-16 | Arnold Flack | Magnet pole pieces and pole piece extensions and shields |
| US4549155A (en) * | 1982-09-20 | 1985-10-22 | The United States Of America As Represented By The United States Department Of Energy | Permanent magnet multipole with adjustable strength |
| US5949316A (en) * | 1995-08-24 | 1999-09-07 | The United States Of America As Represented By The Secretary Of The Army | Magnetic reluctor structures and methods |
| US6573817B2 (en) | 2001-03-30 | 2003-06-03 | Sti Optronics, Inc. | Variable-strength multipole beamline magnet |
| US7079319B2 (en) * | 2002-02-08 | 2006-07-18 | Rene Helbing | Optical signal control device and method for utilizing same |
| JP4941938B2 (en) * | 2007-10-10 | 2012-05-30 | 三菱自動車工業株式会社 | Capacitance change detection circuit, touch panel, and determination method |
| US8736136B2 (en) * | 2011-02-16 | 2014-05-27 | Toyota Motor Engineering & Manufacturing North America, Inc. | Magnetic field manipulation in switched reluctance motors and design method |
| RU2011106381A (en) * | 2011-02-22 | 2012-08-27 | Закрытое акционерное общество "Нанотех-Актив" (RU) | MAGNETIC MODULE |
| US8736128B2 (en) * | 2011-08-10 | 2014-05-27 | Toyota Motor Engineering & Manufacturing North America, Inc. | Three dimensional magnetic field manipulation in electromagnetic devices |
| US8810345B1 (en) * | 2013-08-23 | 2014-08-19 | J. Thomas Goserud | Device for retrieving and securing golf ball marks |
| US10137582B2 (en) | 2016-11-18 | 2018-11-27 | Wahl Clipper Corporation | Flux bridge for pivot motors |
| EP3382678B1 (en) * | 2017-03-27 | 2019-07-31 | Ecole Polytechnique Federale De Lausanne (Epfl) | An electromagnetic actuator |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1114606A (en) * | 1954-11-18 | 1956-04-16 | Csf | Improvements to permanent magnets |
| US2925517A (en) * | 1957-05-23 | 1960-02-16 | Bell Telephone Labor Inc | Electron beam focusing magnetic circuit |
| GB886916A (en) * | 1958-10-28 | 1962-01-10 | Roe A V & Co Ltd | Improvements in or relating to magnetic circuits employing permanent magnets or electro magnets |
| GB842531A (en) * | 1958-12-24 | 1960-07-27 | Mullard Ltd | Permanent magnets |
| NL287237A (en) * | 1961-12-27 | |||
| DE1801974A1 (en) * | 1968-10-09 | 1970-05-27 | Deutsche Edelstahlwerke Ag | Low-scatter permanent magnet system for magnetic dynamic speakers, microphones, etc. |
| US3768054A (en) * | 1972-04-03 | 1973-10-23 | Gen Electric | Low flux leakage magnet construction |
-
1972
- 1972-10-26 US US00301094A patent/US3781736A/en not_active Expired - Lifetime
-
1973
- 1973-09-19 DE DE19732347039 patent/DE2347039A1/en not_active Withdrawn
- 1973-10-18 IT IT7330243A patent/IT995956B/en active
- 1973-10-23 ES ES419858A patent/ES419858A1/en not_active Expired
- 1973-10-24 GB GB4955473A patent/GB1454754A/en not_active Expired
- 1973-10-24 FR FR7337840A patent/FR2204854B1/fr not_active Expired
- 1973-10-24 JP JP48119060A patent/JPS49132595A/ja active Pending
- 1973-10-25 NL NL7314663A patent/NL7314663A/xx not_active Application Discontinuation
- 1973-10-25 SU SU731974624A patent/SU824901A3/en active
-
1979
- 1979-12-28 JP JP1979181487U patent/JPS5629930Y2/ja not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0161782A1 (en) * | 1984-04-11 | 1985-11-21 | Sumitomo Special Metal Co., Ltd. | Magnetic field generating device for NMR-CT |
| GB2196855A (en) * | 1986-09-12 | 1988-05-11 | Marubeni Kk | Magnetic therapeutic device |
| GB2196855B (en) * | 1986-09-12 | 1991-06-26 | Marubeni Kk | Magnetic therapeutic device |
Also Published As
| Publication number | Publication date |
|---|---|
| US3781736A (en) | 1973-12-25 |
| IT995956B (en) | 1975-11-20 |
| JPS49132595A (en) | 1974-12-19 |
| ES419858A1 (en) | 1976-07-01 |
| FR2204854A1 (en) | 1974-05-24 |
| SU824901A3 (en) | 1981-04-23 |
| NL7314663A (en) | 1974-05-01 |
| DE2347039A1 (en) | 1974-05-09 |
| FR2204854B1 (en) | 1979-08-03 |
| JPS5596614U (en) | 1980-07-04 |
| JPS5629930Y2 (en) | 1981-07-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |
