GB1219918A - Improvements in and relating to moving coil transducers - Google Patents

Improvements in and relating to moving coil transducers

Info

Publication number
GB1219918A
GB1219918A GB37939/68A GB3793968A GB1219918A GB 1219918 A GB1219918 A GB 1219918A GB 37939/68 A GB37939/68 A GB 37939/68A GB 3793968 A GB3793968 A GB 3793968A GB 1219918 A GB1219918 A GB 1219918A
Authority
GB
United Kingdom
Prior art keywords
holes
moving coil
diaphragm
polepiece
frequency response
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
GB37939/68A
Inventor
Leslie Eugene Dymoke-Bradshaw
Norman William Tester
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB37939/68A priority Critical patent/GB1219918A/en
Priority to GB1948770A priority patent/GB1219919A/en
Priority to CA058221A priority patent/CA918798A/en
Priority to US846034A priority patent/US3614335A/en
Priority to CH1185469A priority patent/CH505525A/en
Priority to DE19691939837 priority patent/DE1939837A1/en
Priority to ES370321A priority patent/ES370321A1/en
Priority to FR6927325A priority patent/FR2019332A1/fr
Publication of GB1219918A publication Critical patent/GB1219918A/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
    • 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
    • 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
    • H04R9/025—Magnetic circuit

Abstract

1,219,918. Moving coil transducers. STANDARD TELEPHONES & CABLES Ltd. 8 Aug., 1968, No. 37939/68. Heading H4J. Sound equalization in a moving coil electroacoustic transducer is achieved by one or more holes 202 in a front cover 20 which also serve for the ingress or egress of sound and by a damping grid 17 behind the coil 16 in the form of an annular trough having one or more holes 171 with its inner and outer rims attached to an inner polepiece 11 and yoke 12, 13. The polepiece 11 is larger than, and tops a block cylindrical magnet 10. The diaphragm 14 is preferably formed of plastics material. The magnet 10 is either adhered to the pot 12 or is secured by a press-fit. The transducer may be both the receiver and transmitter of a telephone set. The frequency response may be further adjusted by adjusting the volume between the cover 20 and the ear cap or mouthpiece. Low-frequency response can be cut by making one or more holes in the diaphragm.
GB37939/68A 1968-08-08 1968-08-08 Improvements in and relating to moving coil transducers Expired GB1219918A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
GB37939/68A GB1219918A (en) 1968-08-08 1968-08-08 Improvements in and relating to moving coil transducers
GB1948770A GB1219919A (en) 1968-08-08 1968-08-08 Electro-acoustic transducers
CA058221A CA918798A (en) 1968-08-08 1969-07-29 Moving coil transducers
US846034A US3614335A (en) 1968-08-08 1969-07-30 Electroacoustic transducer held together by thermoplastic clamping ring
CH1185469A CH505525A (en) 1968-08-08 1969-08-05 Electro-acoustic converter
DE19691939837 DE1939837A1 (en) 1968-08-08 1969-08-05 Electroacoustic converter
ES370321A ES370321A1 (en) 1968-08-08 1969-08-07 Electroacoustic transducer held together by thermoplastic clamping ring
FR6927325A FR2019332A1 (en) 1968-08-08 1969-08-08

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB37939/68A GB1219918A (en) 1968-08-08 1968-08-08 Improvements in and relating to moving coil transducers

Publications (1)

Publication Number Publication Date
GB1219918A true GB1219918A (en) 1971-01-20

Family

ID=10400082

Family Applications (1)

Application Number Title Priority Date Filing Date
GB37939/68A Expired GB1219918A (en) 1968-08-08 1968-08-08 Improvements in and relating to moving coil transducers

Country Status (7)

Country Link
US (1) US3614335A (en)
CA (1) CA918798A (en)
CH (1) CH505525A (en)
DE (1) DE1939837A1 (en)
ES (1) ES370321A1 (en)
FR (1) FR2019332A1 (en)
GB (1) GB1219918A (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1659551B1 (en) * 1967-01-21 1972-05-25 Braas & Co Gmbh Distance compensation plate for cladding panels
GB1531791A (en) * 1976-03-17 1978-11-08 Rank Organisation Ltd Transducers
FR2363255A1 (en) * 1976-08-27 1978-03-24 Bose Corp LOUDSPEAKER AND METHOD OF MANUFACTURING
DE2929432C2 (en) * 1979-07-20 1981-08-13 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Method of manufacturing an electrodynamic transducer
JPS57196698A (en) * 1981-05-22 1982-12-02 Int Standard Electric Corp Dynamic converter and method of producing same
US4507800A (en) * 1982-01-06 1985-03-26 Analog & Digital Systems, Inc. Enclosed magnet loudspeaker
GB8928899D0 (en) * 1989-12-21 1990-02-28 Knowles Electronics Co Coil assemblies
AT403751B (en) * 1996-06-19 1998-05-25 Akg Akustische Kino Geraete METHOD FOR PRODUCING A MEMBRANE FOR AN ELECTROACOUSTIC TRANSDUCER
JP3797916B2 (en) * 2001-10-30 2006-07-19 シチズン電子株式会社 Speaker and manufacturing method thereof
JP3882589B2 (en) * 2001-11-14 2007-02-21 ソニー株式会社 Speaker
CN103999482B (en) * 2012-12-17 2017-02-22 京瓷株式会社 Acoustic generator, acoustic generation device, and electronic device
JP5934386B2 (en) * 2012-12-25 2016-06-15 京セラ株式会社 SOUND GENERATOR, SOUND GENERATOR, AND ELECTRONIC DEVICE
EP2941016A4 (en) * 2012-12-25 2016-09-21 Kyocera Corp Sound generator, sound generation device and electronic device
DE202014001433U1 (en) * 2014-02-19 2015-02-20 Harman Becker Automotive Systems Gmbh speaker
US9154864B1 (en) * 2014-04-30 2015-10-06 Harman International Industries, Inc. Speaker assembly
US9723410B2 (en) * 2014-07-08 2017-08-01 Harman International Industries, Incorporated Speaker assembly
US9872109B2 (en) 2014-12-17 2018-01-16 Knowles Electronics, Llc Shared coil receiver
FR3046005B1 (en) * 2015-12-17 2018-02-02 Delphi Technologies, Inc. SOUND TRANSMITTING DEVICE

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1915358A (en) * 1930-04-11 1933-06-27 Bell Telephone Labor Inc Electrodynamic device
US1847702A (en) * 1931-05-02 1932-03-01 Bell Telephone Labor Inc Sound translating device
US2293078A (en) * 1939-12-05 1942-08-18 B A Proctor Company Inc Microphone
US2458158A (en) * 1942-11-25 1949-01-04 Permoflux Corp Magnetically shielded electrodynamic sound reproducer
US2585052A (en) * 1948-04-23 1952-02-12 Int Standard Electric Corp Granule type acoustic transducer
US2523802A (en) * 1949-08-06 1950-09-26 Joseph D Zimmerman Electrodynamic pillow-type loudspeaker
DE1153421B (en) * 1959-01-14 1963-08-29 Peiker Acustic Fabrik Elektroa Electrodynamic sound device
DE1121654B (en) * 1960-08-31 1962-01-11 Siemens Ag Method and centering ring for centering the voice coil of an electroacoustic transducer with an annular gap magnet system
CH407233A (en) * 1963-12-14 1966-02-15 Peiker Heinrich Electroacoustic converter

Also Published As

Publication number Publication date
CH505525A (en) 1971-03-31
DE1939837A1 (en) 1970-02-19
FR2019332A1 (en) 1970-07-03
CA918798A (en) 1973-01-09
ES370321A1 (en) 1971-05-16
US3614335A (en) 1971-10-19

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