FR1247967A - Système magnétique à faible dispersion, en particulier pour haut-parleurs, microphones et autres appareils de ce genre - Google Patents

Système magnétique à faible dispersion, en particulier pour haut-parleurs, microphones et autres appareils de ce genre

Info

Publication number
FR1247967A
FR1247967A FR807382A FR807382A FR1247967A FR 1247967 A FR1247967 A FR 1247967A FR 807382 A FR807382 A FR 807382A FR 807382 A FR807382 A FR 807382A FR 1247967 A FR1247967 A FR 1247967A
Authority
FR
France
Prior art keywords
loudspeakers
microphones
low
magnetic system
dispersion magnetic
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
Application number
FR807382A
Other languages
English (en)
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of FR1247967A publication Critical patent/FR1247967A/fr
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
FR807382A 1958-10-15 1959-10-13 Système magnétique à faible dispersion, en particulier pour haut-parleurs, microphones et autres appareils de ce genre Expired FR1247967A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL232314 1958-10-15

Publications (1)

Publication Number Publication Date
FR1247967A true FR1247967A (fr) 1960-12-09

Family

ID=19751389

Family Applications (1)

Application Number Title Priority Date Filing Date
FR807382A Expired FR1247967A (fr) 1958-10-15 1959-10-13 Système magnétique à faible dispersion, en particulier pour haut-parleurs, microphones et autres appareils de ce genre

Country Status (7)

Country Link
US (1) US3067366A (enrdf_load_stackoverflow)
CH (1) CH376149A (enrdf_load_stackoverflow)
DE (1) DE1176768B (enrdf_load_stackoverflow)
ES (1) ES252608A1 (enrdf_load_stackoverflow)
FR (1) FR1247967A (enrdf_load_stackoverflow)
GB (1) GB927545A (enrdf_load_stackoverflow)
NL (2) NL111475C (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2168233A1 (enrdf_load_stackoverflow) * 1971-12-22 1973-08-31 Melnikov Jury
FR2554663A1 (fr) * 1983-11-03 1985-05-10 Magnetfabrik Bonn Gmbh Gewerks Systeme magnetique en pot, a faible dispersion, pour haut-parleurs dynamiques ou convertisseurs acoustiques

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3134057A (en) * 1960-07-11 1964-05-19 Sumitomo Metal Ind Magnetic circuit for the deflection of flux leakage
US3387707A (en) * 1965-06-14 1968-06-11 Westinghouse Electric Corp Permanent magnet assembly
US3478289A (en) * 1968-02-12 1969-11-11 Robert A Parnell Permanent magnet assembly for a loudspeaker assembly
DE1907969A1 (de) * 1968-03-01 1969-09-25 Philips Nv Magnetsystem mit einem ringfoermigen permanenten Hauptmagnet mit einer Weicheisenober- und -unterplatte und einem Kern mit Hilfsmagnet
FR2160353B1 (enrdf_load_stackoverflow) * 1971-11-15 1976-06-11 Knorr Bremse Gmbh
US4323843A (en) * 1978-12-06 1982-04-06 Batham Ian N Magnetic contamination detector
US5142260A (en) * 1991-03-08 1992-08-25 Harman International Industries, Incorporated Transducer motor assembly
US5197104A (en) * 1991-04-18 1993-03-23 Josef Lakatos Electrodynamic loudspeaker with electromagnetic impedance sensor coil
GB9206014D0 (en) * 1992-03-19 1992-04-29 Oxford Instr Ltd Magnet assembly
JPH06233379A (ja) * 1993-02-02 1994-08-19 Kenwood Corp スピーカ
US5409236A (en) * 1993-12-23 1995-04-25 Therrien; Joel M. Magnetic game or puzzle and method for making same
US5802191A (en) * 1995-01-06 1998-09-01 Guenther; Godehard A. Loudspeakers, systems, and components thereof
US5883967A (en) * 1997-04-15 1999-03-16 Harman International Industries, Incorporated Slotted diaphragm loudspeaker
US5879549A (en) * 1997-09-13 1999-03-09 Caiozza; Joseph Filter cartridge magnetic attachment
AU1624700A (en) * 1998-11-13 2000-06-05 Godehard A. Guenther Low cost motor design for rare-earth-magnet loudspeakers
US8588457B2 (en) 1999-08-13 2013-11-19 Dr. G Licensing, Llc Low cost motor design for rare-earth-magnet loudspeakers
US6654476B1 (en) 1999-08-13 2003-11-25 Godehard A. Guenther Low cost broad range loudspeaker and system
US6611606B2 (en) * 2000-06-27 2003-08-26 Godehard A. Guenther Compact high performance speaker
AU2001270247A1 (en) * 2000-06-27 2002-01-08 Godehard A. Guenther Low profile speaker and system
US6993147B2 (en) * 2000-08-14 2006-01-31 Guenther Godehard A Low cost broad range loudspeaker and system
US6835048B2 (en) * 2002-12-18 2004-12-28 Varian, Inc. Ion pump having secondary magnetic field
US20080247582A1 (en) 2004-09-09 2008-10-09 Guenther Godehard A Loudspeaker and Systems
US8189840B2 (en) 2007-05-23 2012-05-29 Soundmatters International, Inc. Loudspeaker and electronic devices incorporating same

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2141595A (en) * 1937-01-13 1938-12-27 Cinaudagraph Corp Magnet structure
BE440964A (enrdf_load_stackoverflow) * 1939-10-05
DE1011466B (de) * 1955-06-18 1957-07-04 Philips Patentverwaltung Magnetsystem fuer elektroakustische Wandler
DE1742108U (de) * 1956-06-14 1957-03-28 Deutsche Edelstahlwerke Ag Dauermagnetsystem mit zentralem eisenkern, insbesondere fuer lautsprecher und tauchspulmikrofone.
US2923783A (en) * 1957-06-17 1960-02-02 Stanley F White Electro-acoustical transducer
US2915681A (en) * 1957-11-20 1959-12-01 Indiana Steel Products Co Magnet assemblies

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2168233A1 (enrdf_load_stackoverflow) * 1971-12-22 1973-08-31 Melnikov Jury
FR2554663A1 (fr) * 1983-11-03 1985-05-10 Magnetfabrik Bonn Gmbh Gewerks Systeme magnetique en pot, a faible dispersion, pour haut-parleurs dynamiques ou convertisseurs acoustiques

Also Published As

Publication number Publication date
CH376149A (de) 1964-03-31
NL111475C (enrdf_load_stackoverflow)
US3067366A (en) 1962-12-04
NL232314A (enrdf_load_stackoverflow)
DE1176768B (de) 1964-08-27
GB927545A (en) 1963-05-29
ES252608A1 (es) 1959-12-01

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