GB486514A - Improvements relating to electro-dynamic loudspeakers and the like - Google Patents

Improvements relating to electro-dynamic loudspeakers and the like

Info

Publication number
GB486514A
GB486514A GB24165/36A GB2416536A GB486514A GB 486514 A GB486514 A GB 486514A GB 24165/36 A GB24165/36 A GB 24165/36A GB 2416536 A GB2416536 A GB 2416536A GB 486514 A GB486514 A GB 486514A
Authority
GB
United Kingdom
Prior art keywords
cone
coil
sept
electro
loud
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
GB24165/36A
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.)
Cie Nationale Electro L L
Original Assignee
Cie Nationale Electro L L
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 Cie Nationale Electro L L filed Critical Cie Nationale Electro L L
Publication of GB486514A publication Critical patent/GB486514A/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
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/041—Centering
    • H04R9/043—Inner suspension or damper, e.g. spider
    • 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
    • H04R9/045—Mounting

Abstract

486,514. Loud-speakers. COMPAGNIE NATIONALE ELECTRO-L.L. Sept. 3, 1936, Nos. 24165 and 24166. Void. Convention dates, Sept. 3, 1935 and Aug. 24, 1936. [Class 40 (iv)] In a moving-coil loud-speaker comprising a cone 5 attached to a support for the coil 4, a centring device 6, made of thin sheet metal and preferably that known under the Registered Trade Mark " Duralumin," is supported by a screw 7 engaged in a stud 8 threaded into the centre polepiece 1. The member 6 has a serrated rim to facilitate its attachment to the cone and is formed with three spiral slots each extending over 120‹ and mutually spaced by an angle of 120‹. The device 6 is resiliently supported on the screw 7 by small discs 10 of fibre or of the substance known under the Registered Trade Mark " Bakelite ". In an alternative arrangement, Figs. 3, 4, a thin disc 6 of metal extending across the inner end of the cone 5 is formed with parallel slots 6a. The disc 6 acts to reproduce the high-frequency sounds, and the portion of the cone 5 between the member 6 and the coil former is preferably stiffened. The inner end of the air-gap communicates with a closed chamber formed by a cap 11 secured to the pole-plate 2. Dimensions of the cone, centring device, and of the spiral slots are given in the Specification.
GB24165/36A 1936-08-24 1936-09-03 Improvements relating to electro-dynamic loudspeakers and the like Expired GB486514A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR48334T 1936-08-24

Publications (1)

Publication Number Publication Date
GB486514A true GB486514A (en) 1938-06-03

Family

ID=8683690

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24165/36A Expired GB486514A (en) 1936-08-24 1936-09-03 Improvements relating to electro-dynamic loudspeakers and the like

Country Status (2)

Country Link
FR (2) FR806201A (en)
GB (1) GB486514A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1191421B (en) * 1962-05-09 1965-04-22 N Izsledovatelski I Pk I Elekt Dynamic speaker
GB2418097A (en) * 2004-09-09 2006-03-15 Anthony John Andrews Loudspeaker suspension element extends radially-inward to centre polepiece

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1191421B (en) * 1962-05-09 1965-04-22 N Izsledovatelski I Pk I Elekt Dynamic speaker
GB2418097A (en) * 2004-09-09 2006-03-15 Anthony John Andrews Loudspeaker suspension element extends radially-inward to centre polepiece

Also Published As

Publication number Publication date
FR806201A (en) 1936-12-10
FR48334E (en) 1937-12-27

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