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
Authority: EP; European Patent Office
Prior art keywords: woofers; gap; annular air; magnetic system; magnetic
Prior art date: 1981-12-24
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.)

1981-12-24

Filing date

1982-12-18

Publication date

1983-09-28

1981-12-24 Priority claimed from DE19813151530 external-priority patent/DE3151530A1/en

1982-12-18 Application filed by Individual filed Critical Individual

1983-07-06 Publication of EP0083045A2 publication Critical patent/EP0083045A2/en

1983-09-28 Publication of EP0083045A3 publication Critical patent/EP0083045A3/en

1985-11-21 Application granted granted Critical

1985-11-21 Publication of EP0083045B1 publication Critical patent/EP0083045B1/en

Status Expired legal-status Critical Current

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
US5321762A (en) *	1991-08-05	1994-06-14	Aura Systems, Inc.	Voice coil actuator
AU672953B2 (en) *	1991-08-05	1996-10-24	Speaker Acquisition Sub	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
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
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 magnetic 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

1982
- 1982-12-18 EP EP82111770A patent/EP0083045B1/en not_active Expired
- 1982-12-18 DE DE8282111770T patent/DE3267630D1/en not_active Expired
- 1982-12-23 US US06/452,769 patent/US4628154A/en not_active Expired - Lifetime

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
US4628154A (en)	1986-12-09
EP0083045A2 (en)	1983-07-06

Publication	Publication Date	Title
GB2126044B (en)	1985-12-18	Loudspeaker system
EP0148111A3 (en)	1985-08-07	Contact system with an electrodynamic opening
AU555918B2 (en)	1986-10-16	Secure telephone system
AU571566B2 (en)	1988-04-21	Frame system for low current installations
GB8512073D0 (en)	1985-06-19	Ultra high loudspeaker system
OA07793A (en)	1986-11-20	Circular seismic acquisition system.
AU557259B2 (en)	1986-12-18	Inductive loop detecting system
IL63102A0 (en)	1981-09-13	System for enciphering messages
DE3267630D1 (en)	1986-01-02	Magnetic system with annular air-gap, in particular for woofers
AU547975B2 (en)	1985-11-14	Core release system
EP0156923A4 (en)	1987-12-09	File system.
DE3273535D1 (en)	1986-11-06	Magnetic orientation system
GR3003186T3 (en)	1993-02-17	Magnet system for rapid disconnection
AU642292B2 (en)	1993-10-14	Magnet system, in particular for magnetic separators
DE3363120D1 (en)	1986-05-28	Digital system including line activity detection
GB8327853D0 (en)	1986-08-20	Magnetic self-ranging system
AU544924B2 (en)	1985-06-20	Annular magnet system
ZA804669B (en)	1981-07-29	An anti-lock system
AR241972A1 (en)	1993-01-29	Magnet system for rapid disconnection
GB8414690D0 (en)	1984-07-11	Shopping list system
AU543673B2 (en)	1985-04-26	Telephone system
PL232197A1 (en)	1983-01-17	Electric system,especially for delayed switching on the electromagnetic brake in ring spinning frames
GB2215641B (en)	1992-03-18	Matrix for magnetic separators.
AU9155982A (en)	1983-07-07	Close-coupled, unitized power system
PL234893A1 (en)	1983-08-01	Flow-metar,especially fuel-meter system

Legal Events

Date	Code	Title	Description
1983-05-05	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1983-07-06	AK	Designated contracting states	Designated state(s): DE FR GB IT
1983-07-25	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
1983-09-28	AK	Designated contracting states	Designated state(s): DE FR GB IT
1984-06-06	17P	Request for examination filed	Effective date: 19840323
1985-07-24	ITF	It: translation for a ep patent filed
1985-09-20	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1985-11-21	AK	Designated contracting states	Designated state(s): DE FR GB IT
1986-01-02	REF	Corresponds to:	Ref document number: 3267630 Country of ref document: DE Date of ref document: 19860102
1986-02-28	ET	Fr: translation filed
1986-09-23	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
1986-09-23	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
1986-11-12	26N	No opposition filed
1990-12-31	ITTA	It: last paid annual fee
1998-12-02	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: GB Payment date: 19981202 Year of fee payment: 17
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2000-08-09	GBPC	Gb: european patent ceased through non-payment of renewal fee	Effective date: 19991218
2000-08-31	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20000831
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