FR382260A - Improvements to diaphragms of phonographic and telephone devices - Google Patents

Improvements to diaphragms of phonographic and telephone devices

Info

Publication number
FR382260A
FR382260A FR382260DA FR382260A FR 382260 A FR382260 A FR 382260A FR 382260D A FR382260D A FR 382260DA FR 382260 A FR382260 A FR 382260A
Authority
FR
France
Prior art keywords
phonographic
diaphragms
telephone devices
telephone
devices
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
Joseph George Coombs
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR382260A publication Critical patent/FR382260A/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
    • 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
    • H04R7/127—Non-planar diaphragms or cones dome-shaped

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR382260D 1907-09-27 1907-09-27 Improvements to diaphragms of phonographic and telephone devices Expired FR382260A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR382260T 1907-09-27

Publications (1)

Publication Number Publication Date
FR382260A true FR382260A (en) 1908-02-03

Family

ID=1428348

Family Applications (1)

Application Number Title Priority Date Filing Date
FR382260D Expired FR382260A (en) 1907-09-27 1907-09-27 Improvements to diaphragms of phonographic and telephone devices

Country Status (1)

Country Link
FR (1) FR382260A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1103392B (en) * 1957-08-02 1961-03-30 Zeiss Ikon Ag Dome membrane for electroacoustic transducers, especially for pressure chamber systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1103392B (en) * 1957-08-02 1961-03-30 Zeiss Ikon Ag Dome membrane for electroacoustic transducers, especially for pressure chamber systems

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