GB927545A - Improvements in magnet systems - Google Patents

Improvements in magnet systems

Info

Publication number
GB927545A
GB927545A GB34507/59A GB3450759A GB927545A GB 927545 A GB927545 A GB 927545A GB 34507/59 A GB34507/59 A GB 34507/59A GB 3450759 A GB3450759 A GB 3450759A GB 927545 A GB927545 A GB 927545A
Authority
GB
United Kingdom
Prior art keywords
magnet
gap
housing
permanent magnet
magnetic material
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
GB34507/59A
Other languages
English (en)
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
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 Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB927545A publication Critical patent/GB927545A/en
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)
GB34507/59A 1958-10-15 1959-10-12 Improvements in magnet systems Expired GB927545A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
GB927545A true GB927545A (en) 1963-05-29

Family

ID=19751389

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34507/59A Expired GB927545A (en) 1958-10-15 1959-10-12 Improvements in magnet systems

Country Status (7)

Country Link
US (1) US3067366A (de)
CH (1) CH376149A (de)
DE (1) DE1176768B (de)
ES (1) ES252608A1 (de)
FR (1) FR1247967A (de)
GB (1) GB927545A (de)
NL (2) NL232314A (de)

Families Citing this family (25)

* 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 (de) * 1971-11-15 1976-06-11 Knorr Bremse Gmbh
GB1360080A (en) * 1971-12-22 1974-07-17 Melnikov J A Magnetic system
US4323843A (en) * 1978-12-06 1982-04-06 Batham Ian N Magnetic contamination detector
DE3339720A1 (de) * 1983-11-03 1985-05-15 Magnetfabrik Bonn Gmbh Vorm. Gewerkschaft Windhorst, 5300 Bonn Streuarmes topfmagnetsystem fuer magnet-dynamische lautsprecher bzw. akustische wandler
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
CN100348074C (zh) * 1998-11-13 2007-11-07 戈德哈德A·冈瑟 用于稀土磁体扬声器的低成本马达结构
US8588457B2 (en) 1999-08-13 2013-11-19 Dr. G Licensing, Llc Low cost motor design for rare-earth-magnet loudspeakers
EP1247424B1 (de) 1999-08-13 2013-11-20 Dr. G Licensing, LLC Billiger breitbereichslautsprecher und system
US6611606B2 (en) 2000-06-27 2003-08-26 Godehard A. Guenther Compact high performance speaker
JP2004502366A (ja) * 2000-06-27 2004-01-22 ゴードハード　エイ　グエンサー 薄型スピーカ及びシステム
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
WO2006029378A2 (en) * 2004-09-09 2006-03-16 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 (de) * 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

Also Published As

Publication number Publication date
ES252608A1 (es) 1959-12-01
NL111475C (de)
NL232314A (de)
CH376149A (de) 1964-03-31
DE1176768B (de) 1964-08-27
FR1247967A (fr) 1960-12-09
US3067366A (en) 1962-12-04

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