FR2003076A1 - - Google Patents

Info

Publication number
FR2003076A1
FR2003076A1 FR6905701A FR6905701A FR2003076A1 FR 2003076 A1 FR2003076 A1 FR 2003076A1 FR 6905701 A FR6905701 A FR 6905701A FR 6905701 A FR6905701 A FR 6905701A FR 2003076 A1 FR2003076 A1 FR 2003076A1
Authority
FR
France
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.)
Withdrawn
Application number
FR6905701A
Other languages
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
Priority claimed from NL6802907A external-priority patent/NL6802907A/xx
Priority claimed from NL6814825A external-priority patent/NL6814825A/xx
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2003076A1 publication Critical patent/FR2003076A1/fr
Withdrawn legal-status Critical Current

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)
  • Hard Magnetic Materials (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
FR6905701A 1968-03-01 1969-03-03 Withdrawn FR2003076A1 (enrdf_load_stackoverflow)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL6802907A NL6802907A (enrdf_load_stackoverflow) 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
FR2003076A1 true FR2003076A1 (enrdf_load_stackoverflow) 1969-11-07

Family

ID=26644303

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6905701A Withdrawn FR2003076A1 (enrdf_load_stackoverflow) 1968-03-01 1969-03-03

Country Status (6)

Country Link
US (1) US3593239A (enrdf_load_stackoverflow)
BE (1) BE729073A (enrdf_load_stackoverflow)
CH (1) CH494459A (enrdf_load_stackoverflow)
DE (1) DE1907969A1 (enrdf_load_stackoverflow)
DK (1) DK118903B (enrdf_load_stackoverflow)
FR (1) FR2003076A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2137567A1 (enrdf_load_stackoverflow) * 1971-05-07 1972-12-29 Rank Organisation Ltd

Families Citing this family (14)

* Cited by examiner, † Cited by third party
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
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
USD267644S (en) 1981-08-03 1983-01-18 James B. Lansing Sound, Inc. Loudspeaker magnet housing
JPS59139794A (ja) * 1983-01-31 1984-08-10 Ibuki Kogyo Kk 漏洩磁場を打消したホ−ンスピ−カ−
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 (de) * 1995-07-27 1995-10-05 Nokia (Deutschland) Gmbh, 75175 Pforzheim Magnetsystem
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
WO2007103414A2 (en) * 2006-03-09 2007-09-13 Juvent, Inc. Mechanical loading apparatus having a signal modulating assembly
US8795210B2 (en) * 2006-07-11 2014-08-05 American Medical Innovations, L.L.C. System and method for a low profile vibrating plate
TWI545973B (zh) * 2014-01-29 2016-08-11 Merry Electronics Co Ltd External magnetic circuit improved structure

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1076838B (de) * 1956-06-14 1960-03-03 Deutsche Edelstahlwerke Ag Dauermagnetsystem mit zentralem Eisenkern
NL232314A (enrdf_load_stackoverflow) * 1958-10-15

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2137567A1 (enrdf_load_stackoverflow) * 1971-05-07 1972-12-29 Rank Organisation Ltd

Also Published As

Publication number Publication date
DE1907969A1 (de) 1969-09-25
BE729073A (enrdf_load_stackoverflow) 1969-08-27
US3593239A (en) 1971-07-13
DK118903B (da) 1970-10-19
CH494459A (de) 1970-07-31

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Legal Events

Date Code Title Description
ST Notification of lapse