FR585642A - Improvements in talking machines - Google Patents

Improvements in talking machines

Info

Publication number
FR585642A
FR585642A FR585642DA FR585642A FR 585642 A FR585642 A FR 585642A FR 585642D A FR585642D A FR 585642DA FR 585642 A FR585642 A FR 585642A
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)
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 FR585642A publication Critical patent/FR585642A/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
    • H04R7/14—Non-planar diaphragms or cones corrugated, pleated or ribbed

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR585642D 1923-10-23 1924-09-11 Improvements in talking machines Expired FR585642A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB585642X 1923-10-23

Publications (1)

Publication Number Publication Date
FR585642A true FR585642A (en) 1925-03-04

Family

ID=10481910

Family Applications (1)

Application Number Title Priority Date Filing Date
FR585642D Expired FR585642A (en) 1923-10-23 1924-09-11 Improvements in talking machines

Country Status (1)

Country Link
FR (1) FR585642A (en)

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