EP0339820A3 - Electromagnetic transducer - Google Patents

Electromagnetic transducer Download PDF

Info

Publication number
EP0339820A3
EP0339820A3 EP19890303509 EP89303509A EP0339820A3 EP 0339820 A3 EP0339820 A3 EP 0339820A3 EP 19890303509 EP19890303509 EP 19890303509 EP 89303509 A EP89303509 A EP 89303509A EP 0339820 A3 EP0339820 A3 EP 0339820A3
Authority
EP
European Patent Office
Prior art keywords
secondary coil
electromagnetic transducer
moving coil
coil
induction
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.)
Withdrawn
Application number
EP19890303509
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0339820A2 (en
Inventor
Saad Gabr
Yasser Gabr
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
Application filed by Individual filed Critical Individual
Publication of EP0339820A2 publication Critical patent/EP0339820A2/en
Publication of EP0339820A3 publication Critical patent/EP0339820A3/en
Withdrawn legal-status Critical Current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
    • H04R2209/043—Short circuited voice coils driven by induction

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
EP19890303509 1988-04-26 1989-04-10 Electromagnetic transducer Withdrawn EP0339820A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8809805 1988-04-26
GB888809805A GB8809805D0 (en) 1988-04-26 1988-04-26 Electromagnetic transducer

Publications (2)

Publication Number Publication Date
EP0339820A2 EP0339820A2 (en) 1989-11-02
EP0339820A3 true EP0339820A3 (en) 1991-03-20

Family

ID=10635840

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890303509 Withdrawn EP0339820A3 (en) 1988-04-26 1989-04-10 Electromagnetic transducer

Country Status (4)

Country Link
EP (1) EP0339820A3 (ja)
JP (1) JPH01318399A (ja)
AU (1) AU3301289A (ja)
GB (1) GB8809805D0 (ja)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04103796U (ja) * 1991-01-24 1992-09-07 株式会社ケンウツド スピーカ用磁気回路およびそれに用いられるボイスコイル
JPH0761200B2 (ja) * 1991-10-16 1995-06-28 ラックス株式会社 スピーカ
JP4630319B2 (ja) * 2007-09-10 2011-02-09 宏一 平岡 ホーンスピーカ

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR858268A (fr) * 1938-05-04 1940-11-21 Henry Hugues & Son Perfectionnements aux transmetteurs électro-acoustiques et aux appareils analogues
DE2131035A1 (de) * 1971-06-23 1973-01-11 Magnetfab Bonn Gmbh Ringspalt-magnetsystem mit polen verminderter elektrischer leitfaehigkeit
JPS5627600A (en) * 1979-08-10 1981-03-17 Kanenori Kishi Magnetic circuit of moving coil type transducer
US4293741A (en) * 1979-06-21 1981-10-06 Digre Clifford B Magnet assembly
US4295011A (en) * 1979-09-11 1981-10-13 Epicure Products Inc. Linear excursion-constant inductance loudspeaker
EP0339855A2 (en) * 1988-04-27 1989-11-02 Sony Corporation Electrodynamic loudspeaker

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR858268A (fr) * 1938-05-04 1940-11-21 Henry Hugues & Son Perfectionnements aux transmetteurs électro-acoustiques et aux appareils analogues
DE2131035A1 (de) * 1971-06-23 1973-01-11 Magnetfab Bonn Gmbh Ringspalt-magnetsystem mit polen verminderter elektrischer leitfaehigkeit
US4293741A (en) * 1979-06-21 1981-10-06 Digre Clifford B Magnet assembly
JPS5627600A (en) * 1979-08-10 1981-03-17 Kanenori Kishi Magnetic circuit of moving coil type transducer
US4295011A (en) * 1979-09-11 1981-10-13 Epicure Products Inc. Linear excursion-constant inductance loudspeaker
EP0339855A2 (en) * 1988-04-27 1989-11-02 Sony Corporation Electrodynamic loudspeaker

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 5, no. 78 (E-58)[750], 22nd May 1981; & JP-A-56 27 600 (OSANORI KISHI) 17-03-1981 *

Also Published As

Publication number Publication date
GB8809805D0 (en) 1988-06-02
EP0339820A2 (en) 1989-11-02
JPH01318399A (ja) 1989-12-22
AU3301289A (en) 1989-11-02

Similar Documents

Publication Publication Date Title
CA2142886A1 (en) Electromagnetic transducer
MY103881A (en) Loudspeakers.
EP0349801A3 (en) Dynamoelectric machine with diamagnetic flux shield
CA2127557A1 (en) Lightweight High Power Electromotive Device
CA2080656A1 (en) Saturable core proximity sensor including a flux director
EP0347180A3 (en) Improvements in or relating to surface electrical coil structures
EP0222916A4 (en) EXTERNAL MAGNETIC REFLECTOR FOR PHOTOMAGNETIC PLATES.
MY106855A (en) Input devices.
GB2355799B (en) Magnet with improved access
EP0339820A3 (en) Electromagnetic transducer
SE9704392L (sv) Elektromagnetisk anordning
GB1178079A (en) Improvements in or relating to Electromagnetic Separators
SU1109569A1 (ru) Многосекционный магнитопровод индукционной тигельной печи
ES8202450A1 (es) Dispositivo electromagnetico
ES2006327A6 (es) Circuito impulsor electromagnetico.
JPS5427995A (en) Magnetic circuit device
GB1164307A (en) Magnets.
ATE26360T1 (de) Samarium-kobalt-magnetlegierung.
JPS5411411A (en) Magnetic circuit
EP0397322A3 (en) An actuator magnetic circuit and method therefore
CA2053540A1 (en) Inductive load switch utilizing simplified gating
WO1997030308A3 (de) Sicherheitseinrichtung
JPS56148741A (en) Galvanomirror device
JPS5319544A (en) D.c. lightning conductor
JPS56113843A (en) Electromagnetic spring

Legal Events

Date Code Title Description
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

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE DE ES FR GB IT NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE DE ES FR GB IT NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19911103