GB1229040A - - Google Patents

Info

Publication number
GB1229040A
GB1229040A GB1229040DA GB1229040A GB 1229040 A GB1229040 A GB 1229040A GB 1229040D A GB1229040D A GB 1229040DA GB 1229040 A GB1229040 A GB 1229040A
Authority
GB
United Kingdom
Prior art keywords
magnet
annular
magnet assembly
loud
polepieces
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
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 filed Critical
Publication of GB1229040A publication Critical patent/GB1229040A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • 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
    • H04R9/06—Loudspeakers

Abstract

1,229,040. Loud-speakers. J. C. ADATTE. 25 July, 1968 [8 Aug., 1967], No. 35473/68. Heading H4J. A loud-speaker has a magnet assembly including an annular magnet 1 and annular polepieces 2, 3 so as to form an annular air gap 4, and the moving coil 9 is attached to the periphery of the dome-shaped diaphragm 8. Other arrangements for the magnet assembly are possible e.g. the magnet may be formed by two rings (12, 13) joined by a polepiece (14), Fig. 4 (not shown), or the magnet may be a ferrite ring of rectangular cross-section (18) and the polepieces (19, 20) shaped to give the same cross-sectional shape to the magnet assembly conduit as in Fig. 1, Fig. 5 (not shown). The diaphragm is suspended elastically by means 10 and has a damping suspension 11 of foam rubber straps, which comprises in plan, Fig. 3 (not shown), a central annulus and a cross-like arrangement of four straps.
GB1229040D 1967-08-08 1968-07-25 Expired GB1229040A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1123667A CH495101A (en) 1967-08-08 1967-08-08 Loudspeaker, especially for reproduction of mid and low frequencies

Publications (1)

Publication Number Publication Date
GB1229040A true GB1229040A (en) 1971-04-21

Family

ID=4371456

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1229040D Expired GB1229040A (en) 1967-08-08 1968-07-25

Country Status (4)

Country Link
CH (1) CH495101A (en)
DE (1) DE1762642A1 (en)
FR (1) FR1583583A (en)
GB (1) GB1229040A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49126845U (en) * 1973-02-27 1974-10-30
EP0030758A1 (en) * 1979-12-11 1981-06-24 Koninklijke Philips Electronics N.V. An electrodynamic transducer with a mechanical filter

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5414726A (en) * 1977-07-06 1979-02-03 Hitachi Ltd Dome type speaker
JPS6042558Y2 (en) * 1980-04-17 1985-12-27 ソニー株式会社 speaker
DE3339101A1 (en) * 1983-10-28 1984-08-23 Martin 6600 Saarbrücken Hauck Diaphragm for a loudspeaker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49126845U (en) * 1973-02-27 1974-10-30
EP0030758A1 (en) * 1979-12-11 1981-06-24 Koninklijke Philips Electronics N.V. An electrodynamic transducer with a mechanical filter

Also Published As

Publication number Publication date
DE1762642A1 (en) 1970-08-20
CH495101A (en) 1970-08-15
FR1583583A (en) 1969-11-14

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees