FR563445A - Improvements to diaphragms for acoustic instruments - Google Patents

Improvements to diaphragms for acoustic instruments

Info

Publication number
FR563445A
FR563445A FR563445DA FR563445A FR 563445 A FR563445 A FR 563445A FR 563445D A FR563445D A FR 563445DA FR 563445 A FR563445 A FR 563445A
Authority
FR
France
Prior art keywords
diaphragms
acoustic instruments
acoustic
instruments
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
Other languages
French (fr)
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.)
Parlophone Records Ltd
Original Assignee
Gramophone Co 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 Gramophone Co Ltd filed Critical Gramophone Co Ltd
Application granted granted Critical
Publication of FR563445A publication Critical patent/FR563445A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR563445D 1922-07-21 1923-03-09 Improvements to diaphragms for acoustic instruments Expired FR563445A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB563445X 1922-07-21

Publications (1)

Publication Number Publication Date
FR563445A true FR563445A (en) 1923-12-05

Family

ID=10476386

Family Applications (1)

Application Number Title Priority Date Filing Date
FR563445D Expired FR563445A (en) 1922-07-21 1923-03-09 Improvements to diaphragms for acoustic instruments

Country Status (1)

Country Link
FR (1) FR563445A (en)

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