FR660977A - mechanically operated sound transmitter - Google Patents

mechanically operated sound transmitter

Info

Publication number
FR660977A
FR660977A FR660977DA FR660977A FR 660977 A FR660977 A FR 660977A FR 660977D A FR660977D A FR 660977DA FR 660977 A FR660977 A FR 660977A
Authority
FR
France
Prior art keywords
mechanically operated
sound transmitter
operated sound
transmitter
mechanically
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
Rene-Jacques-Henri Planiol
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 FR660977A publication Critical patent/FR660977A/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
    • H04R11/00—Transducers of moving-armature or moving-core type

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR660977D 1928-01-13 1928-01-13 mechanically operated sound transmitter Expired FR660977A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR660977T 1928-01-13

Publications (1)

Publication Number Publication Date
FR660977A true FR660977A (en) 1929-07-19

Family

ID=9010599

Family Applications (1)

Application Number Title Priority Date Filing Date
FR660977D Expired FR660977A (en) 1928-01-13 1928-01-13 mechanically operated sound transmitter

Country Status (1)

Country Link
FR (1) FR660977A (en)

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