FR7730E - Compressed air speaker for phonographs and gramophones - Google Patents

Compressed air speaker for phonographs and gramophones

Info

Publication number
FR7730E
FR7730E FR7730DA FR7730E FR 7730 E FR7730 E FR 7730E FR 7730D A FR7730D A FR 7730DA FR 7730 E FR7730 E FR 7730E
Authority
FR
France
Prior art keywords
gramophones
phonographs
compressed air
air speaker
speaker
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
Henri Joly
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 FR7730E publication Critical patent/FR7730E/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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR7730D 1906-04-10 1906-08-02 Compressed air speaker for phonographs and gramophones Expired FR7730E (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR374163T 1906-04-10
FR7730T 1906-08-02

Publications (1)

Publication Number Publication Date
FR7730E true FR7730E (en) 1907-10-01

Family

ID=1350498

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7730D Expired FR7730E (en) 1906-04-10 1906-08-02 Compressed air speaker for phonographs and gramophones

Country Status (1)

Country Link
FR (1) FR7730E (en)

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