CH494459A - Magnet arrangement with an annular permanent main magnet - Google Patents
Magnet arrangement with an annular permanent main magnetInfo
- Publication number
- CH494459A CH494459A CH290869A CH290869A CH494459A CH 494459 A CH494459 A CH 494459A CH 290869 A CH290869 A CH 290869A CH 290869 A CH290869 A CH 290869A CH 494459 A CH494459 A CH 494459A
- Authority
- CH
- Switzerland
- Prior art keywords
- magnet
- annular permanent
- permanent main
- arrangement
- magnet arrangement
- Prior art date
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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0273—Magnetic circuits with PM for magnetic field generation
- H01F7/0289—Transducers, loudspeakers, moving coil arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/025—Magnetic circuit
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
- H04R2209/022—Aspects regarding the stray flux internal or external to the magnetic circuit, e.g. shielding, shape of magnetic circuit, flux compensation coils
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Hard Magnetic Materials (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL6802907A NL6802907A (en) | 1968-03-01 | 1968-03-01 | |
NL6814825A NL6814825A (en) | 1968-10-16 | 1968-10-16 | Auxiliary magnet for permanent magnet loudspeaker |
Publications (1)
Publication Number | Publication Date |
---|---|
CH494459A true CH494459A (en) | 1970-07-31 |
Family
ID=26644303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH290869A CH494459A (en) | 1968-03-01 | 1969-02-26 | Magnet arrangement with an annular permanent main magnet |
Country Status (6)
Country | Link |
---|---|
US (1) | US3593239A (en) |
BE (1) | BE729073A (en) |
CH (1) | CH494459A (en) |
DE (1) | DE1907969A1 (en) |
DK (1) | DK118903B (en) |
FR (1) | FR2003076A1 (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3783311A (en) * | 1970-12-19 | 1974-01-01 | Coral Audio Corp | Magnetic device for use in acoustic apparatus |
IT958810B (en) * | 1971-05-07 | 1973-10-30 | Rank Organisation Ltd | ELECTROACOUSTIC TRANSDUCER COLARLY PARTS FOR AURICO LARI SPEAKERS AND MICROPHONES |
US3953687A (en) * | 1973-11-05 | 1976-04-27 | Carbonneau Industries, Inc. | Magnetic structure for moving voice coil loudspeaker |
US4063448A (en) * | 1976-08-25 | 1977-12-20 | Agar Instrumentation Inc. | Density meter coil assembly |
US4187444A (en) * | 1978-01-19 | 1980-02-05 | Varian Associates, Inc. | Open-circuit magnet structure for cross-field tubes and the like |
US4293741A (en) * | 1979-06-21 | 1981-10-06 | Digre Clifford B | Magnet assembly |
JPS59139794A (en) * | 1983-01-31 | 1984-08-10 | Ibuki Kogyo Kk | Horn speaker eliminating leaked magnetic field |
US5075662A (en) * | 1989-11-14 | 1991-12-24 | The United States Of America As Represented By The Secretary Of The Army | Enhanced magnetic field within enclosed annular cavity |
DE29512102U1 (en) * | 1995-07-27 | 1995-10-05 | Nokia (Deutschland) Gmbh, 75175 Pforzheim | Magnet system |
US8603017B2 (en) * | 2005-03-07 | 2013-12-10 | American Medical Innovations, L.L.C. | Vibrational therapy assembly for treating and preventing the onset of deep venous thrombosis |
US20080139979A1 (en) * | 2005-07-18 | 2008-06-12 | Juvent, Inc. | Vibrational therapy assembly adapted for removably mounting to a bed |
US20070213179A1 (en) * | 2006-03-09 | 2007-09-13 | Juvent, Inc. | Mechanical loading apparatus having a signal modulating assembly |
WO2008008340A2 (en) * | 2006-07-11 | 2008-01-17 | Juvent, Inc. | System and method for a low profile vibrating plate |
TWI545973B (en) * | 2014-01-29 | 2016-08-11 | Merry Electronics Co Ltd | External magnetic circuit improved structure |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1076838B (en) * | 1956-06-14 | 1960-03-03 | Deutsche Edelstahlwerke Ag | Permanent magnet system with central iron core |
NL111475C (en) * | 1958-10-15 |
-
1969
- 1969-02-18 DE DE19691907969 patent/DE1907969A1/en active Pending
- 1969-02-24 US US801375A patent/US3593239A/en not_active Expired - Lifetime
- 1969-02-26 DK DK107969AA patent/DK118903B/en unknown
- 1969-02-26 CH CH290869A patent/CH494459A/en not_active IP Right Cessation
- 1969-02-27 BE BE729073D patent/BE729073A/xx unknown
- 1969-03-03 FR FR6905701A patent/FR2003076A1/fr not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
DK118903B (en) | 1970-10-19 |
US3593239A (en) | 1971-07-13 |
BE729073A (en) | 1969-08-27 |
DE1907969A1 (en) | 1969-09-25 |
FR2003076A1 (en) | 1969-11-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PL | Patent ceased |