FR689220A - Improvements to talking machines - Google Patents

Improvements to talking machines

Info

Publication number
FR689220A
FR689220A FR689220DA FR689220A FR 689220 A FR689220 A FR 689220A FR 689220D A FR689220D A FR 689220DA FR 689220 A FR689220 A FR 689220A
Authority
FR
France
Prior art keywords
talking machines
talking
machines
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)
Inventor
Bernard-Marie-Emmanu Hanouin
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 filed Critical
Application granted granted Critical
Publication of FR689220A publication Critical patent/FR689220A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR689220D 1930-01-31 1930-01-31 Improvements to talking machines Expired FR689220A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR689220T 1930-01-31

Publications (1)

Publication Number Publication Date
FR689220A true FR689220A (en) 1930-09-03

Family

ID=9027161

Family Applications (1)

Application Number Title Priority Date Filing Date
FR689220D Expired FR689220A (en) 1930-01-31 1930-01-31 Improvements to talking machines

Country Status (1)

Country Link
FR (1) FR689220A (en)

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