GB328840A - Improvements in or relating to the reproduction of sound - Google Patents

Improvements in or relating to the reproduction of sound

Info

Publication number
GB328840A
GB328840A GB1777229A GB1777229A GB328840A GB 328840 A GB328840 A GB 328840A GB 1777229 A GB1777229 A GB 1777229A GB 1777229 A GB1777229 A GB 1777229A GB 328840 A GB328840 A GB 328840A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
units
reflector
impregnated
ribs
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
GB1777229A
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.)
JAMES BERNARD FAGAN
Original Assignee
JAMES BERNARD FAGAN
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 JAMES BERNARD FAGAN filed Critical JAMES BERNARD FAGAN
Priority to GB1777229A priority Critical patent/GB328840A/en
Publication of GB328840A publication Critical patent/GB328840A/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
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms 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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
    • 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)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

328,840. Fagan, J. B. June 10, 1929. Loud-speakers; magnetic instruments; diaphragms.-A rigid diaphragm 5, Fig. 1, is divided by ribs 2 into separate resonator areas of different natural frequencies and to the ribs are attached either a plurality of reproducing or transmitting units S or a spider 19, Fig. 10, co-operating with a single reproducing or transmitting unit. The diaphragm is preferably of wood such as spruce, tapered in thickness from one side to the other and impregnated with unvulcanized rubber or other plant latex. It is clamped between two frames at its edge, the frames being held in the casing 8 by bolts 1<a>. The units S are mounted on diagonally located supports 3, Figs. 1 and 2, and each unit is designed to actuate an equal area of the diaphragm. The units may be arranged to form an elliptical pattern with the major axis parallel to the supports 3. The preferred driving unit is that described in Specification 313,406, the actuating coils being connected in seriesparallel. A reflector 11, provided to close the back of the casing 8, consists of a curved spruce board 11, Figs. 6 and 7, mounted in a frame 10, 13 and has a plurality of projecting fins 12, 14, Figs. 2 and 6, of arcuate shape preferably arranged symmetrically in pairs to form plane lunes. This reflector is also impregnated with rubber or natural plant latex.
GB1777229A 1929-06-10 1929-06-10 Improvements in or relating to the reproduction of sound Expired GB328840A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1777229A GB328840A (en) 1929-06-10 1929-06-10 Improvements in or relating to the reproduction of sound

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1777229A GB328840A (en) 1929-06-10 1929-06-10 Improvements in or relating to the reproduction of sound

Publications (1)

Publication Number Publication Date
GB328840A true GB328840A (en) 1930-05-08

Family

ID=10100927

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1777229A Expired GB328840A (en) 1929-06-10 1929-06-10 Improvements in or relating to the reproduction of sound

Country Status (1)

Country Link
GB (1) GB328840A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3187116A (en) * 1961-09-20 1965-06-01 E J Mosher Transducer
DE102010044905B4 (en) * 2010-09-09 2013-11-14 Klaus Reck Speaker diaphragm

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3187116A (en) * 1961-09-20 1965-06-01 E J Mosher Transducer
DE102010044905B4 (en) * 2010-09-09 2013-11-14 Klaus Reck Speaker diaphragm

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