EP0083045A3 - Magnetic system with annular air-gap, in particular for woofers - Google Patents

Magnetic system with annular air-gap, in particular for woofers Download PDF

Info

Publication number
EP0083045A3
EP0083045A3 EP82111770A EP82111770A EP0083045A3 EP 0083045 A3 EP0083045 A3 EP 0083045A3 EP 82111770 A EP82111770 A EP 82111770A EP 82111770 A EP82111770 A EP 82111770A EP 0083045 A3 EP0083045 A3 EP 0083045A3
Authority
EP
European Patent Office
Prior art keywords
woofers
gap
annular air
magnetic system
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.)
Granted
Application number
EP82111770A
Other languages
German (de)
Other versions
EP0083045B1 (en
EP0083045A2 (en
Inventor
Eckehard Kort
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.)
Individual
Original Assignee
Individual
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 DE19813151530 external-priority patent/DE3151530A1/en
Application filed by Individual filed Critical Individual
Publication of EP0083045A2 publication Critical patent/EP0083045A2/en
Publication of EP0083045A3 publication Critical patent/EP0083045A3/en
Application granted granted Critical
Publication of EP0083045B1 publication Critical patent/EP0083045B1/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
    • 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)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
EP82111770A 1981-12-24 1982-12-18 Magnetic system with annular air-gap, in particular for woofers Expired EP0083045B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19813151530 DE3151530A1 (en) 1981-12-24 1981-12-24 Annular-gap magnet system, particularly for low-frequency loudspeakers
DE3151530 1981-12-24
DE8226166U 1982-09-17
DE8226166 1982-09-17

Publications (3)

Publication Number Publication Date
EP0083045A2 EP0083045A2 (en) 1983-07-06
EP0083045A3 true EP0083045A3 (en) 1983-09-28
EP0083045B1 EP0083045B1 (en) 1985-11-21

Family

ID=25798319

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82111770A Expired EP0083045B1 (en) 1981-12-24 1982-12-18 Magnetic system with annular air-gap, in particular for woofers

Country Status (3)

Country Link
US (1) US4628154A (en)
EP (1) EP0083045B1 (en)
DE (1) DE3267630D1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5070530A (en) * 1987-04-01 1991-12-03 Grodinsky Robert M Electroacoustic transducers with increased magnetic stability for distortion reduction
US5142260A (en) * 1991-03-08 1992-08-25 Harman International Industries, Incorporated Transducer motor assembly
WO1993003586A1 (en) * 1991-08-05 1993-02-18 Aura Systems, Inc. Voice coil actuator
US5321762A (en) * 1991-08-05 1994-06-14 Aura Systems, Inc. Voice coil actuator
US5390257A (en) * 1992-06-05 1995-02-14 Oslac; Michael J. Light-weight speaker system
US5883967A (en) * 1997-04-15 1999-03-16 Harman International Industries, Incorporated Slotted diaphragm loudspeaker
US6963652B1 (en) 2003-04-18 2005-11-08 James M Colombo Low frequency generator
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
CN102378083A (en) * 2010-08-12 2012-03-14 郭建文 Dynamic damping middle/low-sound loudspeaker
US20130170689A1 (en) * 2011-07-25 2013-07-04 Dr. G Licensing, Llc Ultra-Low Profile Loudspeakers
DK180111B1 (en) * 2018-10-04 2020-05-06 Upper Level Aps A magnet system for an electromechanical transducer

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE574429C (en) * 1929-06-25 1933-04-18 Heinrich Eberhard Installation on electrodynamic loudspeakers
GB858250A (en) * 1958-07-01 1961-01-11 Darwins Ltd Improvements in or relating to permanent magnet assemblies
DE1614164A1 (en) * 1967-06-01 1970-06-25 Magnetfab Bonn Gmbh Annular gap magnet system
GB1321581A (en) * 1971-01-04 1973-06-27 Rola Celestion Ltd Magnet assemblies for moving coil electroacoustic transducers
DE2211818A1 (en) * 1970-10-01 1973-09-13 Stanley F White MAGNETIC ARRANGEMENT FOR DYNAMIC SPEAKERS
FR2304238A1 (en) * 1975-03-14 1976-10-08 Licentia Gmbh Moving-coil loudspeaker has elastic buffer ring around central pole - and base plate forms extension of central pole to prevent membrane stem driving hard against base plate
FR2382822A1 (en) * 1977-03-01 1978-09-29 Seas Fabrikker As ELECTRODYNAMIC SPEAKER DEVICE

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL257376A (en) * 1959-10-29
DE2024258A1 (en) * 1970-05-19 1971-12-02 Neckarelz Mikrofonbau Magnet system for electroacoustic transducers
JPS542647Y2 (en) * 1971-03-10 1979-02-05
US3803522A (en) * 1973-05-11 1974-04-09 Arnold Eng Co Air gap extending the width of a permanent magnet assembly
JPS5244627A (en) * 1975-10-04 1977-04-07 Sony Corp Magnet core type speaker
SU587645A1 (en) * 1976-07-21 1978-01-05 Предприятие П/Я А-3150 Electrodynamic loudspeaker magnetic circuit
JPS5376824A (en) * 1976-12-20 1978-07-07 Hitachi Ltd Speaker
JPS5546645A (en) * 1978-09-29 1980-04-01 Sony Corp Head phone
JPS6038077B2 (en) * 1980-04-16 1985-08-29 松下電器産業株式会社 speaker

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE574429C (en) * 1929-06-25 1933-04-18 Heinrich Eberhard Installation on electrodynamic loudspeakers
GB858250A (en) * 1958-07-01 1961-01-11 Darwins Ltd Improvements in or relating to permanent magnet assemblies
DE1614164A1 (en) * 1967-06-01 1970-06-25 Magnetfab Bonn Gmbh Annular gap magnet system
DE2211818A1 (en) * 1970-10-01 1973-09-13 Stanley F White MAGNETIC ARRANGEMENT FOR DYNAMIC SPEAKERS
GB1321581A (en) * 1971-01-04 1973-06-27 Rola Celestion Ltd Magnet assemblies for moving coil electroacoustic transducers
FR2304238A1 (en) * 1975-03-14 1976-10-08 Licentia Gmbh Moving-coil loudspeaker has elastic buffer ring around central pole - and base plate forms extension of central pole to prevent membrane stem driving hard against base plate
FR2382822A1 (en) * 1977-03-01 1978-09-29 Seas Fabrikker As ELECTRODYNAMIC SPEAKER DEVICE

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, Band 6, Nr. 28, (E-95)[906], 19. Februar 1982 & JP - A - 56 146 400 (MATSUSHITA DENKI SANGYO K.K.) 13.11.1981 *

Also Published As

Publication number Publication date
EP0083045B1 (en) 1985-11-21
DE3267630D1 (en) 1986-01-02
EP0083045A2 (en) 1983-07-06
US4628154A (en) 1986-12-09

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