GB465794A - Improvements in electro-acoustical reproducers - Google Patents

Improvements in electro-acoustical reproducers

Info

Publication number
GB465794A
GB465794A GB3560836A GB3560836A GB465794A GB 465794 A GB465794 A GB 465794A GB 3560836 A GB3560836 A GB 3560836A GB 3560836 A GB3560836 A GB 3560836A GB 465794 A GB465794 A GB 465794A
Authority
GB
United Kingdom
Prior art keywords
ring
diaphragm
central portion
secured
annular
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
GB3560836A
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.)
CINAUDAGRAPH CORP
Original Assignee
CINAUDAGRAPH CORP
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 CINAUDAGRAPH CORP filed Critical CINAUDAGRAPH CORP
Priority to GB30936/35A priority Critical patent/GB465795A/en
Priority to GB3560836A priority patent/GB465794A/en
Priority to NL75531A priority patent/NL45876C/xx
Priority to FR797982D priority patent/FR797982A/en
Priority to US53018A priority patent/US2084945A/en
Publication of GB465794A publication Critical patent/GB465794A/en
Priority to US149428A priority patent/US2200490A/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
    • H04R7/16—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
    • 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
    • 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
    • H04R7/125—Non-planar diaphragms or cones comprising a plurality of sections or layers comprising a plurality of superposed layers in contact
    • 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
    • H04R7/127—Non-planar diaphragms or cones dome-shaped
    • 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
    • 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

Landscapes

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

Abstract

465,794. Loud - speakers. GROVES, W. W. (Cinaudagraph Corporation) Nov. 8, 1935, No. 35608/36. Divided out of 465,795. [Class 40 (iv)] An electro-acoustical device comprises a diaphragm having a central portion separated from an annular marginal portion by an intermediate annular portion to which a voice-coil support is rigidly secured and which is formed to have such rigidity relative to the remaining portions of the diaphragm that this intermediate portion alone propagates the highest audible frequencies. The intermediate rigid portion is preferably formed with a groove in which the coil support is secured. As shown in Figs. 1, 4 the intermediate rigid portion 14 is formed as an inverted groove to which is cemented a cylindrical former 10 of mica located in an annular gap formed between magnetic members 1, 5. The former has longitudinal cracks to facilitate its formation into the cylindrical shape. The central portion of the diaphragm is formed as a dome 12 and the rigid portion 14 is extended outwardly in the form of a skirt 15 having a flat peripheral flange secured to a soft ring 13 clamped at its periphery between a ring 19 and a horn 16. The ring 13, which is preferably of chamois or of cotton napped on one side and coated on the other side with rubber latex, forms the low frequency part of the diaphragm. A relatively stiff ring 18, preferably of cardboard, is cemented to the ring 13. The ring 19 is spaced from the poleplate 5 by spacers 20. The centre portion of the inner polepiece is formed with a channel 23 dimensioned in conjunction with the volumes of the air chamber 22 under the dome 12 and of the air chamber 21 formed behind the ring 13 so that the pressures in these chambers are approximately equal when the diaphragm is vibrated at low frequencies. In a modification, Fig. 5, the ring 13a is clamped between the horn 16a and the front face of a cabinet having its walls made of the material known under the Registered Trade Mark " Celotex," or alternatively provided with a layer 26 of soundabsorbing material, such as ozite or cotton batting. The central portion of the diaphragm is formed as an outwardly directed part 12a and a dished central portion 12b.
GB3560836A 1935-11-08 1935-11-08 Improvements in electro-acoustical reproducers Expired GB465794A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB30936/35A GB465795A (en) 1935-11-08 1935-11-08 Improvements in electro-acoustical reproducers
GB3560836A GB465794A (en) 1935-11-08 1935-11-08 Improvements in electro-acoustical reproducers
NL75531A NL45876C (en) 1935-11-08 1935-11-14
FR797982D FR797982A (en) 1935-11-08 1935-11-19 Loud speaker
US53018A US2084945A (en) 1935-11-08 1935-12-05 Loudspeaker
US149428A US2200490A (en) 1935-11-08 1937-06-21 Loud-speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3560836A GB465794A (en) 1935-11-08 1935-11-08 Improvements in electro-acoustical reproducers

Publications (1)

Publication Number Publication Date
GB465794A true GB465794A (en) 1937-05-10

Family

ID=10379610

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3560836A Expired GB465794A (en) 1935-11-08 1935-11-08 Improvements in electro-acoustical reproducers

Country Status (1)

Country Link
GB (1) GB465794A (en)

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