GB1384717A - Outer peripheral suspension members for loudspeakers - Google Patents

Outer peripheral suspension members for loudspeakers

Info

Publication number
GB1384717A
GB1384717A GB4837673A GB4837673A GB1384717A GB 1384717 A GB1384717 A GB 1384717A GB 4837673 A GB4837673 A GB 4837673A GB 4837673 A GB4837673 A GB 4837673A GB 1384717 A GB1384717 A GB 1384717A
Authority
GB
United Kingdom
Prior art keywords
copolymer
outer peripheral
loud
ethylene
polyethylene
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
GB4837673A
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.)
Sekisui Chemical Co Ltd
Panasonic Holdings Corp
Original Assignee
Sekisui Chemical Co Ltd
Matsushita Electric Industrial 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
Priority claimed from JP4431971U external-priority patent/JPS483028U/ja
Priority claimed from JP4972571U external-priority patent/JPS484488U/ja
Priority claimed from JP6145171A external-priority patent/JPS5140523B1/ja
Application filed by Sekisui Chemical Co Ltd, Matsushita Electric Industrial Co Ltd filed Critical Sekisui Chemical Co Ltd
Publication of GB1384717A publication Critical patent/GB1384717A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
    • H04R7/125—Non-planar diaphragms or cones comprising a plurality of sections or layers comprising a plurality of superposed layers in contact
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/029—Diaphragms comprising fibres

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Manufacturing & Machinery (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

1384717 Loud-speaker diaphragms MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd and SEKISUI KAGAKU KOGYO KK 30 May 1972 [5 July 1971] 48376/73 Divided out of 1384716 Heading H4J An annular outer peripheral suspension member 22 (Fig. 1) for a loud-speaker cone 20 is formed of foamed plastics having a closed cellular structure. The foamed plastics may be an ethylene-vinyl acetate copolymer or a mixture of polyethylene and an ethylene-vinyl acetate copolymer. Preferred percentages by weight of materials are given. Either a decomposing blowing agent such as azodicarbonamide or a volatile blowing agent such as dichlorodifluoromethane is used. Cross-linked bonds are preferably formed by addition of an organic peroxide, e.g. dicumenyl peroxide, or by irradiation with electron beams or ionizing radiations before the copolymer or the mixture of copolymer and polyethylene is subjected to the foaming process. The suspension member has an annularly raised portion (see also, Fig. 2, not shown) and is formed by heating and pressing a foamed sheet to the required shape.
GB4837673A 1971-05-28 1972-05-30 Outer peripheral suspension members for loudspeakers Expired GB1384717A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP4431971U JPS483028U (en) 1971-05-28 1971-05-28
JP4972571U JPS484488U (en) 1971-06-14 1971-06-14
JP6145171A JPS5140523B1 (en) 1970-08-14 1971-07-12

Publications (1)

Publication Number Publication Date
GB1384717A true GB1384717A (en) 1975-02-19

Family

ID=44583528

Family Applications (3)

Application Number Title Priority Date Filing Date
GB4837673A Expired GB1384717A (en) 1971-05-28 1972-05-30 Outer peripheral suspension members for loudspeakers
GB2521672A Expired GB1384716A (en) 1971-05-28 1972-05-30 Loudspeaker diaphragm
GB4837773A Expired GB1384718A (en) 1971-05-28 1972-05-30 Loudspeaker diaphragm

Family Applications After (2)

Application Number Title Priority Date Filing Date
GB2521672A Expired GB1384716A (en) 1971-05-28 1972-05-30 Loudspeaker diaphragm
GB4837773A Expired GB1384718A (en) 1971-05-28 1972-05-30 Loudspeaker diaphragm

Country Status (3)

Country Link
US (1) US3834486A (en)
DE (1) DE2225710C3 (en)
GB (3) GB1384717A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0251057A1 (en) * 1986-06-21 1988-01-07 EWD Electronic-Werke Deutschland GmbH Loudspeaker
GB2209644A (en) * 1987-09-04 1989-05-17 Ding Pang Chen Circumferential element for a loud speaker

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3960106A (en) * 1970-05-14 1976-06-01 Brey Robert J De Particle flow monitor
DE2500397C2 (en) * 1975-01-07 1986-05-28 Schorlemer, Frhr. von, Reinfried, Dipl.-Phys., 3500 Kassel Membrane for an electroacoustic transducer system and an electroacoustic transducer system equipped with it
JPS5278425A (en) * 1975-12-24 1977-07-01 Sanyo Electric Co Ltd Diaphragm for speaker
US4129195A (en) * 1975-12-24 1978-12-12 Sanyo Electric Co., Ltd. Diaphragm for speaker
GB1563511A (en) * 1976-03-19 1980-03-26 Harwood H Diaphragms for electroacoustic transducers
JPS5379525A (en) * 1976-12-23 1978-07-14 Sony Corp Compound diaphtagm for speakers
JPS5748153Y2 (en) * 1977-11-26 1982-10-22
GB2059717B (en) * 1979-09-25 1984-04-04 Victor Company Of Japan Speaker diaphragm assembly and a method of manufacturing the same
US4445227A (en) * 1981-12-28 1984-04-24 Magnavox Consumer Electronics Company Loudspeaker having improved directional characteristics
NL8200690A (en) * 1982-02-22 1983-09-16 Philips Nv SPEAKER MEMBRANE CONTAINING A LAYER OF POLYMETHACRYLIMIDE FOAM.
GB2144600B (en) * 1983-08-04 1986-09-24 Standard Telephones Cables Ltd Electro acoustic transducer
FR2562369A1 (en) * 1984-03-27 1985-10-04 Thomson Csf Method of manufacturing a transducer diaphragm from a polymer material comprising portions with different stiffnesses and diaphragm obtained by this method
GB8514189D0 (en) * 1985-06-05 1985-07-10 Reefgrade Ltd Electro-mechanical transducer diaphragm
FR2665321A1 (en) * 1990-07-23 1992-01-31 Fontaine Pierre PROCESS FOR MANUFACTURING MEMBRANES FOR ELECTRO-MECHANICAL APPLICATIONS, ESPECIALLY FOR ELECTRO-MECHANICAL TRANDUCTORS AND PRODUCT THEREOF.
US5259036A (en) * 1991-07-22 1993-11-02 Shure Brothers, Inc. Diaphragm for dynamic microphones and methods of manufacturing the same
DE4321506C2 (en) * 1993-06-29 1999-07-29 Ulrich Ranke Loudspeaker diaphragm for a sound generator
CN1122436C (en) * 1994-11-30 2003-09-24 先锋电子股份有限公司 Loudspeaker vibrating diaphragm and methods for its production
FR2734685B1 (en) * 1995-05-23 1997-08-14 Silec Liaisons Elec PIEZOELECTRIC SPEAKER
JP3947321B2 (en) 1999-03-04 2007-07-18 パイオニア株式会社 Foam molded body, molding method thereof and speaker diaphragm using the same
DE19925787C1 (en) * 1999-06-05 2000-12-21 Roehm Gmbh Process for the production of membranes for electroacoustic transducers and membranes
US6724910B1 (en) 1999-10-04 2004-04-20 Harman International Industries, Incorporated Diaphragm stable through hygroscopic cycling
US6351544B1 (en) 1999-12-10 2002-02-26 Harman International Industries Incorporated Regressively hinged spider
JP2002374593A (en) * 2001-06-18 2002-12-26 Pioneer Electronic Corp Speaker diaphragm
DE10135414C1 (en) * 2001-07-25 2003-03-13 Roehm Gmbh Production of non-flat membranes for electroacoustic transducers
US6929091B2 (en) * 2002-10-28 2005-08-16 Sound Advance Systems, Inc. Planar diaphragm loudspeaker and related methods
ATE315880T1 (en) * 2003-09-11 2006-02-15 Akg Acoustics Gmbh DYNAMIC ELECTROACOUSTIC TRANSDUCER, ESPECIALLY SMALL SPEAKER
EP1694094A1 (en) * 2005-02-18 2006-08-23 AKG Acoustics GmbH Membrane for a dynamic converter
JP2008167150A (en) * 2006-12-28 2008-07-17 Matsushita Electric Ind Co Ltd Speaker
EP2271137A1 (en) * 2009-07-03 2011-01-05 DR. KURT MÜLLER GmbH & Co. KG Loudspeaker membrane and method for manufacturing a loudspeaker membrane
JP5665194B2 (en) * 2011-08-19 2015-02-04 株式会社オーディオテクニカ Electroacoustic transducer diaphragm and method of manufacturing the same
USD776086S1 (en) * 2014-04-23 2017-01-10 Martin Audio Limited Loudspeaker
KR102503134B1 (en) * 2015-02-05 2023-02-24 이글 어코스틱스 매뉴팩쳐링, 엘엘씨 Integrated voice coil and cone assembly and method of manufacturing the same
US9769570B2 (en) * 2015-03-31 2017-09-19 Bose Corporation Acoustic diaphragm
JP1549098S (en) * 2015-11-26 2016-05-16

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125647A (en) * 1964-03-17 Frequency-o cycles sec
BE377376A (en) * 1930-02-15
US1990409A (en) * 1932-02-19 1935-02-05 Neville Athol Ernest Acoustical diaphragm
US2146975A (en) * 1936-11-06 1939-02-14 Nagelvoort Adriaan Acoustic diaphragm
USRE24141E (en) * 1952-10-25 1956-04-10 Method of making the same
US2815823A (en) * 1953-03-02 1957-12-10 Rca Corp Loudspeaker structure
US2905260A (en) * 1955-02-24 1959-09-22 Muter Company Loud speaker diaphragm
US3093207A (en) * 1960-10-04 1963-06-11 R T Bozak Mfg Company Metallic diaphragm for electrodynamic loudspeakers
US3153463A (en) * 1961-08-30 1964-10-20 Muter Company Compound loudspeaker diaphragm
US3111189A (en) * 1962-01-12 1963-11-19 Theodore R Scholl Electrodynamic loudspeaker
US3285364A (en) * 1965-06-01 1966-11-15 Ling Temco Vought Inc Loudspeaker construction
AT274080B (en) * 1967-07-05 1969-09-10 Philips Nv Sound transducer with a foam membrane

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0251057A1 (en) * 1986-06-21 1988-01-07 EWD Electronic-Werke Deutschland GmbH Loudspeaker
GB2209644A (en) * 1987-09-04 1989-05-17 Ding Pang Chen Circumferential element for a loud speaker

Also Published As

Publication number Publication date
GB1384716A (en) 1975-02-19
DE2264881A1 (en) 1975-08-21
DE2264881B2 (en) 1976-10-14
US3834486A (en) 1974-09-10
DE2225710A1 (en) 1972-12-14
DE2225710B2 (en) 1975-04-24
DE2225710C3 (en) 1975-12-04
GB1384718A (en) 1975-02-19

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years