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GB1380914A - Diaphragm assemblies for electro-acoustic transducers - Google Patents

Diaphragm assemblies for electro-acoustic transducers

Info

Publication number
GB1380914A
GB1380914A GB33171*[A GB33171A GB1380914A GB 1380914 A GB1380914 A GB 1380914A GB 33171 A GB33171 A GB 33171A GB 1380914 A GB1380914 A GB 1380914A
Authority
GB
United Kingdom
Prior art keywords
dome
surround
annular
tags
see
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
GB33171*[A
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.)
ROLA CELESTION Ltd
Original Assignee
ROLA CELESTION 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 ROLA CELESTION Ltd filed Critical ROLA CELESTION Ltd
Priority to GB33171*[A priority Critical patent/GB1380914A/en
Priority to NO04781/71A priority patent/NO130255B/no
Priority to IT55019/71A priority patent/IT945663B/en
Priority to CH1911171A priority patent/CH545053A/en
Priority to AT1126671A priority patent/AT326744B/en
Priority to FI3744/71A priority patent/FI57507C/en
Priority to DE19712166848 priority patent/DE2166848A1/en
Priority to DE2165572A priority patent/DE2165572C3/en
Priority to BE777617A priority patent/BE777617A/en
Priority to FR7200005A priority patent/FR2121536B1/fr
Priority to IE2/72A priority patent/IE35948B1/en
Priority to US00215332A priority patent/US3780232A/en
Priority to ES398583A priority patent/ES398583A1/en
Priority to SE7200063A priority patent/SE379474C/en
Priority to NL7200036A priority patent/NL7200036A/xx
Priority to DK2872AA priority patent/DK138148B/en
Publication of GB1380914A publication Critical patent/GB1380914A/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
    • H04R7/127—Non-planar diaphragms or cones dome-shaped
    • 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
    • H04R7/22—Clamping rim of diaphragm or cone against seating

Landscapes

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

Abstract

1380914 Diaphragms; moving coil transducers ROLA CELESTION Ltd 30 Dec 1971 [4 Jan 1971] 331/71 Heading H4J A loud-speaker or other electro-acoustic transducer has a diaphragm comprising a resilient self-sustaining dome 26 and a separately formed surround 28. The dome is made by coating a soft woven fabric with epoxy resin, heating and pressing in a die to the required dome shape and then treating with a plastics material which is unaffected by climatic conditions, e.g. heat and dampness. The surround 28 is clamped between rubber washers 24 at its periphery and has a corrugated portion and an inclined portion (see Fig. 2A, not shown). The inclined portion is glued or cemented to the dome 26. The surround 28 is made from linen impregnated with incompletely cured phenol formaldehyde resin. The corrugated portion is formed during a heating and pressing operation which also hardens the resin. The dome 26 and surround 28 are impervious to air. The voice coil 30 is mounted on a cylindrical epoxy resin coated paper tube and is secured to the dome 26 and surround 28 by glue or cement. The loud-speaker shown is of the "mid range" type and comprises an annular front plate 10 behind which fits an annular strip 14 of synthetic material. Behind a protective grill are a pair of insulating washers 18 and between the washers 18 pass beryllium strips 20 (see also Fig. 2A, not shown) which connect the voice coil 30 to tags 33. A stainless steel diaphragm housing 22 (see also Fig. 2A) is provided. The tags 33 are at the periphery of a washer 32. A magnet assembly comprises an annular polepiece 34 having a front dome of perforated brass sheet. A foam plug 37 fills the aperture in polepiece 34. An annular foam strip 38 is compressed by an annular magnet 40, preferably of the ceramic type. The magnet assembly is held between front and rear plates 42, 44 by brass screws 46. A rear cover 48 is filled by a foam plug 50 and fits around the rear plate 44. Leads connect between external tags 52 and the tags 33.
GB33171*[A 1971-01-04 1971-01-04 Diaphragm assemblies for electro-acoustic transducers Expired GB1380914A (en)

Priority Applications (16)

Application Number Priority Date Filing Date Title
GB33171*[A GB1380914A (en) 1971-01-04 1971-01-04 Diaphragm assemblies for electro-acoustic transducers
NO04781/71A NO130255B (en) 1971-01-04 1971-12-22
IT55019/71A IT945663B (en) 1971-01-04 1971-12-27 IMPROVEMENT IN SPEAKERS FOR MEDIUM FREQUENCIES
CH1911171A CH545053A (en) 1971-01-04 1971-12-29 Electroacoustic converter
AT1126671A AT326744B (en) 1971-01-04 1971-12-30 MEMBRANE FOR AN ELECTROACOUSTIC CONVERTER
FI3744/71A FI57507C (en) 1971-01-04 1971-12-30 MEMBRANORGAN FOER HOEGTALARE
DE19712166848 DE2166848A1 (en) 1971-01-04 1971-12-30 ELECTROACOUSTIC CONVERTER
DE2165572A DE2165572C3 (en) 1971-01-04 1971-12-30 Speaker cone
BE777617A BE777617A (en) 1971-01-04 1971-12-31 SPEAKER SYSTEMS IMPROVEMENTS
FR7200005A FR2121536B1 (en) 1971-01-04 1972-01-03
IE2/72A IE35948B1 (en) 1971-01-04 1972-01-04 Improvements in or relating to diaphragm assemblies for electroacoustic transducers
US00215332A US3780232A (en) 1971-01-04 1972-01-04 Loudspeaker diaphragm
ES398583A ES398583A1 (en) 1971-01-04 1972-01-04 Loudspeaker diaphragm
SE7200063A SE379474C (en) 1971-01-04 1972-01-04 diaphragm means
NL7200036A NL7200036A (en) 1971-01-04 1972-01-04
DK2872AA DK138148B (en) 1971-01-04 1972-01-04 Membrane device for an electroacoustic transducer.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB33171*[A GB1380914A (en) 1971-01-04 1971-01-04 Diaphragm assemblies for electro-acoustic transducers

Publications (1)

Publication Number Publication Date
GB1380914A true GB1380914A (en) 1975-01-15

Family

ID=9702509

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33171*[A Expired GB1380914A (en) 1971-01-04 1971-01-04 Diaphragm assemblies for electro-acoustic transducers

Country Status (15)

Country Link
US (1) US3780232A (en)
AT (1) AT326744B (en)
BE (1) BE777617A (en)
CH (1) CH545053A (en)
DE (2) DE2166848A1 (en)
DK (1) DK138148B (en)
ES (1) ES398583A1 (en)
FI (1) FI57507C (en)
FR (1) FR2121536B1 (en)
GB (1) GB1380914A (en)
IE (1) IE35948B1 (en)
IT (1) IT945663B (en)
NL (1) NL7200036A (en)
NO (1) NO130255B (en)
SE (1) SE379474C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2525429A (en) * 2014-04-24 2015-10-28 Funktion One Res Loudspeaker

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1531791A (en) * 1976-03-17 1978-11-08 Rank Organisation Ltd Transducers
JPS5414726A (en) * 1977-07-06 1979-02-03 Hitachi Ltd Dome type speaker
DE2941644C2 (en) * 1978-10-17 1982-11-11 Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka Loudspeaker cone and process for their manufacture
DE2905566A1 (en) * 1979-02-14 1980-08-28 Standard Elektrik Lorenz Ag UNIVERSAL CALOTE SPEAKER COMPONENT
CH639707A5 (en) * 1979-08-16 1983-11-30 Staeubli Ag ROTATION MACHINE.
JPS6042558Y2 (en) * 1980-04-17 1985-12-27 ソニー株式会社 speaker
US4433214A (en) * 1981-12-24 1984-02-21 Motorola, Inc. Acoustical transducer with a slotted piston suspension
DE3722832A1 (en) * 1987-07-03 1989-01-12 Electronic Werke Deutschland Diaphragm for a loudspeaker
US5357587A (en) * 1992-12-23 1994-10-18 Grodinsky Robert M Distortion reduction in loudspeakers
JP3140895B2 (en) * 1993-10-08 2001-03-05 パイオニア株式会社 Speaker device
AT414069B (en) * 1999-04-22 2006-08-15 Akg Acoustics Gmbh ELECTRIC ACOUSTIC CONVERTER FOR EXTREME PRESSURE LOADS
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
JP2002152885A (en) * 2000-11-14 2002-05-24 Sony Corp Speaker device
DK1515582T3 (en) * 2003-09-11 2006-05-15 Akg Acoustics Gmbh Dynamic electro-acoustic converter, especially small speaker
EP1694094A1 (en) * 2005-02-18 2006-08-23 AKG Acoustics GmbH Membrane for a dynamic converter
AU2007231525A1 (en) * 2006-03-28 2007-10-04 Immersion Technology Property Limited Loudspeaker system with acoustic equalisation
WO2009142091A1 (en) * 2008-05-21 2009-11-26 ジーナスオーディオ株式会社 Speaker
CN103085338B (en) * 2013-01-21 2014-12-10 宁海县雁苍山电力建设有限公司 Manufacturing method of mold pressing combined paper winding drum
CN204929237U (en) * 2015-07-31 2015-12-30 常州美欧电子有限公司 Portable terminal

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US685429A (en) * 1901-02-05 1901-10-29 George Osten Diaphragm for acoustical apparatus.
GB385286A (en) * 1930-03-17 1932-12-22 Walter Greppert Improvements in and relating to diaphragms, more particularly for sound boxes of talking machines
US2442791A (en) * 1945-09-07 1948-06-08 Bell Telephone Labor Inc Acoustic device
GB763974A (en) * 1953-10-14 1956-12-19 Koepenick Funkwerk Veb Electro-acoustic transducer of the moving coil type
US2974204A (en) * 1954-07-06 1961-03-07 Kane Corp Du Transducer
AT193449B (en) * 1955-09-30 1957-11-25 Siemens Ag Metal membrane
DE1107712B (en) * 1958-12-31 1961-05-31 Sennheiser Electronic Method of making a membrane
US3033945A (en) * 1959-05-01 1962-05-08 Ar Inc Voice coil and diaphragm support for high frequency loud-speaker
US3328537A (en) * 1964-01-09 1967-06-27 Hecht William High frequency sound translating device
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
GB2525429A (en) * 2014-04-24 2015-10-28 Funktion One Res Loudspeaker
US9532144B2 (en) 2014-04-24 2016-12-27 Funktion One Research Loudspeaker

Also Published As

Publication number Publication date
IT945663B (en) 1973-05-10
SE379474C (en) 1981-05-04
DE2165572C3 (en) 1981-06-19
DE2166848A1 (en) 1976-03-11
DE2165572A1 (en) 1972-07-20
IE35948B1 (en) 1976-07-07
FR2121536A1 (en) 1972-08-25
FI57507B (en) 1980-04-30
IE35948L (en) 1972-07-04
DK138148C (en) 1979-01-08
NO130255B (en) 1974-07-29
CH545053A (en) 1973-11-30
ES398583A1 (en) 1974-09-16
NL7200036A (en) 1972-07-06
AT326744B (en) 1975-12-29
BE777617A (en) 1972-04-17
US3780232A (en) 1973-12-18
FR2121536B1 (en) 1979-08-03
FI57507C (en) 1980-08-11
DK138148B (en) 1978-07-17
DE2165572B2 (en) 1975-11-06
SE379474B (en) 1975-10-06

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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