GB869620A - Electroacoustic transducers - Google Patents

Electroacoustic transducers

Info

Publication number
GB869620A
GB869620A GB6007/59A GB600759A GB869620A GB 869620 A GB869620 A GB 869620A GB 6007/59 A GB6007/59 A GB 6007/59A GB 600759 A GB600759 A GB 600759A GB 869620 A GB869620 A GB 869620A
Authority
GB
United Kingdom
Prior art keywords
conductor
plate
diaphragm
magnet
magnetic
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
GB6007/59A
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 GB869620A publication Critical patent/GB869620A/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
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/04—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism
    • 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)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

869,620. Sound receiving and transmitting devices. GAMZON, R. R., and FREI, E. H. Feb. 20, 1959 [March 7, 1958], No. 6007/59. Class 40 (4). A transducer comprises a flexible non-magnetic diaphragm which carries a pliable electric ribbon conductor, the conductor being positioned adjacent to but outside any air gaps between a number of magnetic poles. As shown in Fig. 2, the magnetic poles are formed in a number of discrete regions N, S in a magnet plate 1 of highly coercive oriented ferrite material such as barium ferrite, the plate having apertures 7 for air-pressure equalizing purposes, and a soft iron backing-plate (not shown). The diaphragm 2, Fig. 1, is formed of a synthetic polyester material such as polyethylene, glycol or terephthalate and carries a thin printed aluminium conductor 5, the conductor being positioned adjacent to and overlying the regions of opposite magnetic polarity. In a modification, Fig. 5, the magnet plate comprises magnetic bars such as 1a, 1b mounted on a soft iron backing-plate 4a. Improved efficiency is stated to be obtained by the use of a diaphragm 2a positioned between two magnet plates as shown in Fig. 6. In a modification, Fig. 7, weight is reduced by tapering the magnet bars, and the diaphragm supports a conductor 5d, 5e on each face of which one may serve as a feed-back conductor. A circular magnet plate 8 and associated diaphragm 9 are shown in Figs. 8 and 9, respectively, the plate magnetization and conductor 10 configurations being in the form of two intertwined spirals. The conductor ends at terminals 11, 11a and the magnet plate is formed with a central aperture 12. It is stated that the transducer may be associated with a horn for the reproduction of signals in the higher audio frequency range, Fig. 11 (not shown). An alternative transducer may have the conductor and plate magnetization arranged in the intertwined labyrinth pattern shown in Fig. 12. In a further arrangement, Fig. 13, a hollow ferrite cylinder 18 is surrounded by a cylindrical diaphragm 19 on which a conductor 20 is imprinted.
GB6007/59A 1958-03-07 1959-02-20 Electroacoustic transducers Expired GB869620A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IL1116858 1958-03-07

Publications (1)

Publication Number Publication Date
GB869620A true GB869620A (en) 1961-05-31

Family

ID=11043133

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6007/59A Expired GB869620A (en) 1958-03-07 1959-02-20 Electroacoustic transducers

Country Status (8)

Country Link
US (1) US3013905A (en)
BE (1) BE576384A (en)
CH (1) CH373781A (en)
DE (1) DE1094802B (en)
DK (1) DK102969C (en)
FR (1) FR1218259A (en)
GB (1) GB869620A (en)
NL (2) NL112193C (en)

Cited By (1)

* 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

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3139490A (en) * 1958-10-15 1964-06-30 Lyons Philip Daniel Sound reproducing and recording device
US3164686A (en) * 1959-09-21 1965-01-05 Tibbetts Industries Electrodynamic transducer
FR1269138A (en) * 1960-06-23 1961-08-11 Improvements to loudspeakers, microphones, and similar electrodynamic devices
US3141071A (en) * 1960-07-18 1964-07-14 Rosen Alfred H Full range electroacoustic transducers
NL274947A (en) * 1961-02-20
US3132215A (en) * 1961-03-03 1964-05-05 Maico Electronics Inc Acoustical device
AT239344B (en) * 1963-03-13 1965-03-25 Akg Akustische Kino Geraete Electrodynamic headphones
NL290698A (en) * 1963-03-26
NL6509969A (en) * 1965-07-31 1967-02-01
US3497642A (en) * 1966-02-28 1970-02-24 Intron Int Inc Transducer diaphragm imbedded with conductively-coated ferromagnetic particles
IT958810B (en) * 1971-05-07 1973-10-30 Rank Organisation Ltd ELECTROACOUSTIC TRANSDUCER COLARLY PARTS FOR AURICO LARI SPEAKERS AND MICROPHONES
SE363956B (en) * 1972-06-20 1974-02-04 P Beer
US3898598A (en) * 1974-01-24 1975-08-05 Foster Tsushin Kogyo Dynamic electroacoustic transducer
US3922504A (en) * 1975-01-02 1975-11-25 Foster Electric Co Ltd Electroacoustic transducer
US4013846A (en) * 1975-08-28 1977-03-22 Minnesota Mining And Manufacturing Company Piston loudspeaker
US4210786A (en) * 1979-01-24 1980-07-01 Magnepan, Incorporated Magnetic field structure for planar speaker
NL7908447A (en) * 1979-11-20 1981-06-16 Philips Nv MAGNETIC SYSTEM FOR AN 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
DE3123098C2 (en) * 1981-06-11 1983-06-01 Martin 4600 Dortmund Stute Membrane for electroacoustic transducer systems
US4550228A (en) * 1983-02-22 1985-10-29 Apogee Acoustics, Inc. Ribbon speaker system
CA2100773A1 (en) * 1991-01-17 1992-07-18 Roger A. Adelman Hearing apparatus
WO2001067812A1 (en) * 2000-03-03 2001-09-13 American Technology Corporation Single end planar magnetic speaker
US6934402B2 (en) * 2001-01-26 2005-08-23 American Technology Corporation Planar-magnetic speakers with secondary magnetic structure
US20040200801A1 (en) * 2001-11-19 2004-10-14 Lai Laurence M.C. Manufacture having double sided features in a metal-containing web and manufacture and method for forming same in a liquid-based etch process
US8358801B2 (en) * 2007-02-12 2013-01-22 Robert Katz Magnetic circuit for electrodynamic moving voice coil actuators
US20090175488A1 (en) * 2008-01-09 2009-07-09 Jui-Cheng Chang Diaphragm and Electrical-Acoustic Transducer having the same
US8942408B1 (en) 2011-07-22 2015-01-27 James Joseph Croft, III Magnetically one-side driven planar transducer with improved electro-magnetic circuit
US8774430B2 (en) * 2011-12-02 2014-07-08 Thomas Paul Heed Linear interleaved magnetic motor and loudspeaker transducer using same
US9197965B2 (en) 2013-03-15 2015-11-24 James J. Croft, III Planar-magnetic transducer with improved electro-magnetic circuit
DE102014211687A1 (en) * 2014-06-18 2015-12-24 Sennheiser Electronic Gmbh & Co. Kg Electrodynamic transducer
DE102017122660A1 (en) * 2016-10-04 2018-04-05 Sennheiser Electronic Gmbh & Co. Kg Planar dynamic transducer
RU199764U1 (en) * 2020-06-09 2020-09-21 Сергей Юрьевич Глазырин MATRIX Emitter
US11956589B1 (en) 2021-07-13 2024-04-09 Wisdom Audio Corp. PMD speaker mounting assembly and thermal control system for multiple drivers

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE484339C (en) * 1929-10-15 Lorenz Akt Ges C Electrodynamic telephone, especially for loudspeakers
US1238439A (en) * 1914-04-24 1917-08-28 Rudow Rummler Telephone for transmitting and reproducing sounds.
US1877254A (en) * 1930-09-12 1932-09-13 Gen Motors Radio Corp Sheet material
US2269149A (en) * 1939-11-24 1942-01-06 Gen Electric Permanent magnet
US2565591A (en) * 1946-10-05 1951-08-28 Pentone Inc Electrical earphone device
GB674470A (en) * 1950-06-01 1952-06-25 Frank Thomas Cooper Improvements in or relating to ribbon microphones
DE971374C (en) * 1951-04-23 1959-01-15 Philips Nv Magnet body, consisting of a ferromagnetic part with high permeability and an embedded permanent magnet in the form of a thin, elongated body
US2722617A (en) * 1951-11-28 1955-11-01 Hartford Nat Bank & Trust Comp Magnetic circuits and devices
CH314504A (en) * 1953-05-22 1956-06-15 Bohli Jakob Magnetic system for dynamic ribbon microphone
US2903673A (en) * 1954-01-06 1959-09-08 Harris Transducer Corp Acoustical impedance-matching transducer

Cited By (1)

* 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

Also Published As

Publication number Publication date
US3013905A (en) 1961-12-19
DK102969C (en) 1965-11-01
NL112193C (en)
CH373781A (en) 1963-12-15
NL236904A (en)
BE576384A (en) 1959-07-01
DE1094802B (en) 1960-12-15
FR1218259A (en) 1960-05-10

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