FR594213A - Improvements to phonographs - Google Patents

Improvements to phonographs

Info

Publication number
FR594213A
FR594213A FR594213DA FR594213A FR 594213 A FR594213 A FR 594213A FR 594213D A FR594213D A FR 594213DA FR 594213 A FR594213 A FR 594213A
Authority
FR
France
Prior art keywords
phonographs
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 FR594213A publication Critical patent/FR594213A/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)
FR594213D 1924-05-14 1925-02-27 Improvements to phonographs Expired FR594213A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB594213X 1924-05-14

Publications (1)

Publication Number Publication Date
FR594213A true FR594213A (en) 1925-09-08

Family

ID=10483735

Family Applications (1)

Application Number Title Priority Date Filing Date
FR594213D Expired FR594213A (en) 1924-05-14 1925-02-27 Improvements to phonographs

Country Status (1)

Country Link
FR (1) FR594213A (en)

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