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GB640367A - Improvements relating to diaphragms for loudspeakers - Google Patents

Improvements relating to diaphragms for loudspeakers

Info

Publication number
GB640367A
GB640367A GB1423947A GB1423947A GB640367A GB 640367 A GB640367 A GB 640367A GB 1423947 A GB1423947 A GB 1423947A GB 1423947 A GB1423947 A GB 1423947A GB 640367 A GB640367 A GB 640367A
Authority
GB
United Kingdom
Prior art keywords
speech coil
cone
cylindrical portion
diaphragms
impregnated
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
GB1423947A
Inventor
Thomas Frederick Hassan
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.)
ACOUSTIC PRODUCTS Ltd
Original Assignee
ACOUSTIC PRODUCTS Ltd
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 ACOUSTIC PRODUCTS Ltd filed Critical ACOUSTIC PRODUCTS Ltd
Priority to GB1423947A priority Critical patent/GB640367A/en
Publication of GB640367A publication Critical patent/GB640367A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

640,367. Diaphragms. ACOUSTIC PRODUCTS, Ltd. May 28, 1947, No. 14239. [Class 40 (iv)] [Also in Group V] An integrally formed loudspeaker diaphragm comprises a cone 5 and a central cylindrical portion which consists of at least two cylindrical sections 9, 10 of successively smaller diameter in the direction of a terminal section 11 which carries a speech coil, the junctions between the adjoining sections and with the cone forming compliances which permit effective highfrequency response of the speech coil. The diaphragm is formed from a felted fibrous blank having a peripheral suspension ring of fabric (Fig. 1, not shown) and is finally shaped by pressing (see Group V), the central cylindrical portion and the adjacent cone surface being impregnated with a thermo-setting plastic material and hardened by heat treatment. The pressing operation reduces the thicknesses of the impregnated parts, suitable dimensions being given. The speech coil leads are threaded through holes 15, 16 to avoid the central suspension member when fitted. Specifications 548,756 and 613,287 are referred to.
GB1423947A 1947-05-28 1947-05-28 Improvements relating to diaphragms for loudspeakers Expired GB640367A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1423947A GB640367A (en) 1947-05-28 1947-05-28 Improvements relating to diaphragms for loudspeakers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1423947A GB640367A (en) 1947-05-28 1947-05-28 Improvements relating to diaphragms for loudspeakers

Publications (1)

Publication Number Publication Date
GB640367A true GB640367A (en) 1950-07-19

Family

ID=10037551

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1423947A Expired GB640367A (en) 1947-05-28 1947-05-28 Improvements relating to diaphragms for loudspeakers

Country Status (1)

Country Link
GB (1) GB640367A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0185833A1 (en) * 1984-12-27 1986-07-02 Audiotecnica Italina srl Membrane in plastic materials for loudspeakers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0185833A1 (en) * 1984-12-27 1986-07-02 Audiotecnica Italina srl Membrane in plastic materials for loudspeakers

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