FR546789A - - Google Patents

Info

Publication number
FR546789A
FR546789A FR546789DA FR546789A FR 546789 A FR546789 A FR 546789A FR 546789D A FR546789D A FR 546789DA FR 546789 A FR546789 A FR 546789A
Authority
FR
France
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
Other languages
French (fr)
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.)
Publication date
Application granted granted Critical
Publication of FR546789A publication Critical patent/FR546789A/fr
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00Diaphragms for electromechanical transducers; Cones
    • H04R7/02Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04Plane diaphragms
    • H04R7/06Plane diaphragms comprising a plurality of sections or layers

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Manufacture Of Motors, Generators (AREA)
FR546789D 1921-12-29 Expired FR546789A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3494521A GB199749A (en) 1921-12-29 1921-12-29 Methods of producing laminated oscillatory bodies

Publications (1)

Publication Number Publication Date
FR546789A true FR546789A (en) 1922-11-23

Family

ID=10371902

Family Applications (1)

Application Number Title Priority Date Filing Date
FR546789D Expired FR546789A (en) 1921-12-29

Country Status (2)

Country Link
FR (1) FR546789A (en)
GB (1) GB199749A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2428951A1 (en) * 1978-06-15 1980-01-11 Sony Corp LOUDSPEAKER AND MANUFACTURING METHOD

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2428951A1 (en) * 1978-06-15 1980-01-11 Sony Corp LOUDSPEAKER AND MANUFACTURING METHOD

Also Published As

Publication number Publication date
GB199749A (en) 1923-06-29

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