GB1131398A - Improvements in or relating to electrodynamic transducers - Google Patents

Improvements in or relating to electrodynamic transducers

Info

Publication number
GB1131398A
GB1131398A GB700466A GB700466A GB1131398A GB 1131398 A GB1131398 A GB 1131398A GB 700466 A GB700466 A GB 700466A GB 700466 A GB700466 A GB 700466A GB 1131398 A GB1131398 A GB 1131398A
Authority
GB
United Kingdom
Prior art keywords
iron
disc
ring
coil
feb
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
GB700466A
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 GB1131398A publication Critical patent/GB1131398A/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
    • H04R9/025—Magnetic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
    • H04R2209/021—Reduction of eddy currents in the magnetic circuit of electrodynamic loudspeaker transducer

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

Abstract

1,131,398. Electrodynamic transducers. P. MAUZ. 17 Feb., 1966 [17 Feb., 1965], No. 7004/66. Heading H4J. An electrodynamic transducer, e.g. a loudspeaker, comprises a pot-shaped magnet structure having a cylindrical air gap in which is a moving coil 5 connected to a membrane 8. The poles 6, 7 on either side of the gap comprise a plurality of annular discs or rings made of metal and stacked upon one another or otherwise disposed adjacent one another, in the direction of movement of the coil, so that each disc or ring lies in a plane transverse to the direction of movement of the coil. The discs or rings may be of iron, either preformed as segments or formed in situ in grooves in the magnetic structure, e.g. from iron paste. The magnet structure comprises an iron disc 1, a sintered magnetic iron ring 2 and an iron pole-ring 3. A core 4 is attached to the disc 1 by a screw-thread or by adhesion. Parts 1, 2, 3 may be glued.
GB700466A 1965-02-17 1966-02-17 Improvements in or relating to electrodynamic transducers Expired GB1131398A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1965M0064194 DE1280324B (en) 1965-02-17 1965-02-17 Dynamic electro-acoustic converter

Publications (1)

Publication Number Publication Date
GB1131398A true GB1131398A (en) 1968-10-23

Family

ID=7311040

Family Applications (1)

Application Number Title Priority Date Filing Date
GB700466A Expired GB1131398A (en) 1965-02-17 1966-02-17 Improvements in or relating to electrodynamic transducers

Country Status (3)

Country Link
CH (1) CH447284A (en)
DE (1) DE1280324B (en)
GB (1) GB1131398A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5234212B2 (en) * 1971-12-17 1977-09-02
JPS533776Y2 (en) * 1972-10-14 1978-01-31
US4289937A (en) * 1978-05-30 1981-09-15 Mitsubishi Denki Kabushiki Kaisha Speaker with fine grain ferromagnetic material on center pole or ring
DE3108715A1 (en) * 1981-03-07 1982-09-16 Magnetfabrik Bonn Gmbh Vorm. Gewerkschaft Windhorst, 5300 Bonn Annular-gap magnet system for dynamic loudspeakers

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1827114A (en) * 1928-09-20 1931-10-13 Vesper A Schlenker Acoustic device
US1903164A (en) * 1929-06-15 1933-03-28 Temple Corp Loud speaker
DE623800C (en) * 1930-08-14
GB409433A (en) * 1932-11-09 1934-05-03 Henryk Brzeski Improvements in and relating to loud speakers
DE844165C (en) * 1949-07-07 1952-07-17 Wilhelm Petersen speaker

Also Published As

Publication number Publication date
DE1280324B (en) 1968-10-17
CH447284A (en) 1967-11-30

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