GB1418360A - Electroacoustic transducer - Google Patents

Electroacoustic transducer

Info

Publication number
GB1418360A
GB1418360A GB2903473A GB2903473A GB1418360A GB 1418360 A GB1418360 A GB 1418360A GB 2903473 A GB2903473 A GB 2903473A GB 2903473 A GB2903473 A GB 2903473A GB 1418360 A GB1418360 A GB 1418360A
Authority
GB
United Kingdom
Prior art keywords
magnet
diaphragm
poles
concentric
regions
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
GB2903473A
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.)
Beer P F
Original Assignee
Beer P F
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 Beer P F filed Critical Beer P F
Publication of GB1418360A publication Critical patent/GB1418360A/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
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/046—Construction
    • H04R9/047—Construction in which the windings of the moving coil lay in the same plane

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

1418360 Moving coil transducers PALLEFINN BEER 19 June 1973 [20 June 1972] 29034/73 Heading H4J Electroacoustic transducer, e.g. a loudspeaker, microphone, or earphone, has a permanent magnet 20 having on one face one pole N surrounded by another pole S of opposite polarity, with a transitional surface region 28 separating the poles, and a flexible diaphragm 11 of non-magnetic non-conducting material supported by its periphery adjacent the one face of the magnet and carrying a flexible current conductor 30 formed as a number of spiral convolutions on the zone of the diaphragm confronting the transitional surface region 28 of the magnet. Preferably the magnet has a number of circular concentric poles, forming a plurality of transition regions 28, and the diaphragm has a similar plurality of regions of spiral convolutions each confronting a respective transition zone of the magnet surface and each region having a direction of convolution reversed with respect to the concentric adjacent regions of convolutions. The transducer has a magnet 20 on each side of the diaphragm 11, each provided with congruent poles of similar polarity, and each having exponential horn shaped apertures 27 extending therethrough. The magnets can be of plastics bonded barium ferrite or cobalt rare earth magnet material. The diaphragm 11 is of polyester plastics, is formed with concentric circular corrugations, and is held at its centre 18 by a bolt 23 which forms one of the coil terminals.
GB2903473A 1972-06-20 1973-06-19 Electroacoustic transducer Expired GB1418360A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE08109/72A SE363956B (en) 1972-06-20 1972-06-20

Publications (1)

Publication Number Publication Date
GB1418360A true GB1418360A (en) 1975-12-17

Family

ID=20273169

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2903473A Expired GB1418360A (en) 1972-06-20 1973-06-19 Electroacoustic transducer

Country Status (6)

Country Link
US (1) US3919498A (en)
JP (2) JPS4986016A (en)
DE (2) DE2331037B2 (en)
GB (1) GB1418360A (en)
NO (1) NO132745C (en)
SE (1) SE363956B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2154096A (en) * 1984-02-08 1985-08-29 Chien Yuan Liu Loudspeaker
WO2019160523A1 (en) 2018-02-16 2019-08-22 Shymanovych Pavlo Olegovych Electroacoustic transducer for headphones

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51141619A (en) * 1975-05-31 1976-12-06 Dainippon Printing Co Ltd Energy converting apparatus of flat type
JPS5223529U (en) * 1975-08-06 1977-02-18
US4037061A (en) * 1975-11-13 1977-07-19 Electro Audio Dynamics, Inc. Planar pattern voice coil audio transducer
JPS52123227A (en) * 1976-04-08 1977-10-17 Sharp Corp Speaker
JPS52127325A (en) * 1976-04-19 1977-10-25 Seikosha Kk Speaker
JPS5542557Y2 (en) * 1976-04-19 1980-10-06
DE2836937B2 (en) * 1977-08-31 1981-06-25 AKG Akustische u. Kino-Geräte GmbH, Wien headphones
JPS581040Y2 (en) * 1978-01-12 1983-01-08 山水電気株式会社 Electrodynamic Microphone
JPS587757Y2 (en) * 1978-02-25 1983-02-10 澤藤 正 Planar drive electric-acoustic mutual converter
US4276449A (en) * 1978-06-01 1981-06-30 Tadashi Sawafuji Speaker or microphone having corrugated diaphragm with conductors thereon
JPS5533392A (en) * 1979-06-05 1980-03-08 Tadashi Sawafuji Electroacoustic converter
US4413161A (en) * 1980-02-09 1983-11-01 Nippon Gakki Seizo Kabushiki Kaisha Electro-acoustic transducer
US4384173A (en) * 1980-08-01 1983-05-17 Granus Corporation Electromagnetic planar diaphragm transducer
FR2488765A1 (en) * 1980-08-13 1982-02-19 Telephonie Ind Commerciale Electrodynamic transducer usable as loudspeaker or microphone - has coil formed as printed circuit group of spirals on both faces of membrane above alternating concentric magnetic poles
NL8501166A (en) * 1985-04-23 1986-11-17 Philips Nv ELECTRO-DYNAMIC CONVERTER OF THE ISO PHASE OR TIRE TYPE.
JP2624291B2 (en) * 1988-04-08 1997-06-25 松下電器産業株式会社 Far infrared heater
US5123053A (en) * 1990-07-11 1992-06-16 Harman International Industries, Incorporated Loudspeaker suspension
JP2524440B2 (en) * 1991-08-22 1996-08-14 恭子 溝口 Food storage container
WO1995022234A1 (en) * 1994-02-11 1995-08-17 Kirk Acoustics A/S An electrodynamic transducer
US6154557A (en) * 1998-05-21 2000-11-28 Sonigistix Corporation Acoustic transducer with selective driving force distribution
US6600399B1 (en) 2002-02-05 2003-07-29 Roland Pierre Trandafir Transducer motor/generator assembly
KR100645442B1 (en) * 2005-07-25 2006-11-14 삼성전자주식회사 Method for generating color halftone screen and system therof
US20070154049A1 (en) * 2006-01-05 2007-07-05 Igor Levitsky Transducer, headphone and method for reducing noise
US7726193B2 (en) * 2007-09-27 2010-06-01 Baker Hughes Incorporated Electromagnetic acoustic transducer with cross-talk elimination
US8345895B2 (en) * 2008-07-25 2013-01-01 United Microelectronics Corp. Diaphragm of MEMS electroacoustic transducer

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB262910A (en) * 1925-11-21 1926-12-23 Edward Alfred Graham Improvements in or relating to telephone transmitters and receivers
AT128194B (en) * 1929-07-18 1932-05-10 Aeg Membrane for recording and reproducing acoustic vibrations.
NL236904A (en) * 1958-03-07
US3139490A (en) * 1958-10-15 1964-06-30 Lyons Philip Daniel Sound reproducing and recording device
US3141071A (en) * 1960-07-18 1964-07-14 Rosen Alfred H Full range electroacoustic transducers
NL274947A (en) * 1961-02-20
US3283086A (en) * 1963-06-17 1966-11-01 Willis F Evans Versatile extensive area sound reproducer or audio transducer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2154096A (en) * 1984-02-08 1985-08-29 Chien Yuan Liu Loudspeaker
WO2019160523A1 (en) 2018-02-16 2019-08-22 Shymanovych Pavlo Olegovych Electroacoustic transducer for headphones
US11089407B2 (en) 2018-02-16 2021-08-10 Rinaro Isodynamics (EU) Sp. z o.o. Electroacoustic transducer for headphones

Also Published As

Publication number Publication date
JPS4986016A (en) 1974-08-17
NO132745C (en) 1983-12-28
JPS609398B2 (en) 1985-03-09
DE7322737U (en) 1978-05-18
SE363956B (en) 1974-02-04
NO132745B (en) 1975-09-15
DE2331037B2 (en) 1979-09-20
DE2331037A1 (en) 1974-01-10
US3919498A (en) 1975-11-11
JPS5723394A (en) 1982-02-06

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee