GB1478169A - Diaphragm for electroacoustic transducer - Google Patents

Diaphragm for electroacoustic transducer

Info

Publication number
GB1478169A
GB1478169A GB5580874A GB5580874A GB1478169A GB 1478169 A GB1478169 A GB 1478169A GB 5580874 A GB5580874 A GB 5580874A GB 5580874 A GB5580874 A GB 5580874A GB 1478169 A GB1478169 A GB 1478169A
Authority
GB
United Kingdom
Prior art keywords
conductor
diaphragm
parts
metal parts
transducer
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
GB5580874A
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.)
Foster Electric Co Ltd
Original Assignee
Foster Electric Co Ltd
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 Foster Electric Co Ltd filed Critical Foster Electric Co Ltd
Publication of GB1478169A publication Critical patent/GB1478169A/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)
  • Headphones And Earphones (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

1478169 Diaphragms FOSTER ELECTRIC CO Ltd 24 Dec 1974 55808/74 Heading H4J A circular diaphragm 1 for an electroacoustic transducer comprises a non-magnetic and insulative membrane on which a conductor is formed. The conductor includes a plurality of parallel conductor parts (as shown the two arms of U-shaped pieces A 1 , A 2 , A 3 ... etc.) and a group of other conductor parts 7, 7<SP>1</SP>, 7<SP>11</SP> ... etc. which interconnect the parallel conductor parts with one another and with terminals 5, 6. A group of additional metal parts 9, 10, 11, 12, 13, 14 is electrically insulated from the conductor. These additional metal parts increase the rigidity of the diaphragm and balance the weight distribution in all radial directions of the diaphragm, thereby inhibiting unwanted resonance frequencies and assisting in obtaining a substantially flat frequency response over a relatively wide range. The conductor is of copper or aluminium and the membrane is of polyimide, polyester, mica or phenol formaldehyde resin. The metal parts 9 to 14 may be formed at the same time as the conductor and may be of the same thickness. Alternatively their thicknesses may be varied. In use the conductor is in a magnetic field provided by the transducer. The transducer may be a microphone, headphone or loudspeaker. The diaphragm is held on a circular frame 8, the terminals 5, 6 being close to the frame 8.
GB5580874A 1974-12-23 1974-12-24 Diaphragm for electroacoustic transducer Expired GB1478169A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2461257A DE2461257C3 (en) 1974-12-23 1974-12-23 Diaphragm for an electroacoustic transducer

Publications (1)

Publication Number Publication Date
GB1478169A true GB1478169A (en) 1977-06-29

Family

ID=5934471

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5580874A Expired GB1478169A (en) 1974-12-23 1974-12-24 Diaphragm for electroacoustic transducer

Country Status (3)

Country Link
US (1) US3922503A (en)
DE (1) DE2461257C3 (en)
GB (1) GB1478169A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2433883A1 (en) * 1978-08-18 1980-03-14 Sony Corp ELECTRO-ACOUSTIC TRANSDUCER
GB2230677A (en) * 1989-04-22 1990-10-24 Pioneer Electronic Corp Loudspeaker diaphragm balancing
EP2234409A3 (en) * 2002-02-28 2010-10-06 The Furukawa Electric Co., Ltd. Planar speaker

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2002619B (en) * 1977-07-13 1982-03-17 Victor Company Of Japan Moving-coil type stereo pickup cartridge
US4471172A (en) * 1982-03-01 1984-09-11 Magnepan, Inc. Planar diaphragm transducer with improved magnetic circuit
US4471173A (en) * 1982-03-01 1984-09-11 Magnepan, Inc. Piston-diaphragm speaker
US4480155A (en) * 1982-03-01 1984-10-30 Magnepan, Inc. Diaphragm type magnetic transducer
NL8501166A (en) * 1985-04-23 1986-11-17 Philips Nv ELECTRO-DYNAMIC CONVERTER OF THE ISO PHASE OR TIRE TYPE.
US5430805A (en) * 1990-12-27 1995-07-04 Chain Reactions, Inc. Planar electromagnetic transducer
US6154557A (en) * 1998-05-21 2000-11-28 Sonigistix Corporation Acoustic transducer with selective driving force distribution
ATE354855T1 (en) * 2000-10-13 2007-03-15 Lapp Insulator Gmbh PRODUCTION OF COMPOSITE INSULATORS BY INJECTING INDIVIDUAL SHIELDS TO A STRUCTURE
US9197965B2 (en) 2013-03-15 2015-11-24 James J. Croft, III Planar-magnetic transducer with improved electro-magnetic circuit
TW201813417A (en) * 2016-09-20 2018-04-01 固昌通訊股份有限公司 Planar speaker unit
UA120313C2 (en) 2018-02-16 2019-11-11 Павло Олегович Шиманович ELECTROACOUSTIC CONVERTER FOR HEADPHONES

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3141071A (en) * 1960-07-18 1964-07-14 Rosen Alfred H Full range electroacoustic transducers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2433883A1 (en) * 1978-08-18 1980-03-14 Sony Corp ELECTRO-ACOUSTIC TRANSDUCER
GB2230677A (en) * 1989-04-22 1990-10-24 Pioneer Electronic Corp Loudspeaker diaphragm balancing
GB2230677B (en) * 1989-04-22 1993-07-21 Pioneer Electronic Corp Cone-type speaker
EP2234409A3 (en) * 2002-02-28 2010-10-06 The Furukawa Electric Co., Ltd. Planar speaker

Also Published As

Publication number Publication date
DE2461257C3 (en) 1978-11-02
DE2461257B2 (en) 1978-03-09
DE2461257A1 (en) 1976-07-01
US3922503A (en) 1975-11-25

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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