FR29748E - Vibrating membrane for telephone devices - Google Patents

Vibrating membrane for telephone devices

Info

Publication number
FR29748E
FR29748E FR29748DA FR29748E FR 29748 E FR29748 E FR 29748E FR 29748D A FR29748D A FR 29748DA FR 29748 E FR29748 E FR 29748E
Authority
FR
France
Prior art keywords
vibrating membrane
telephone devices
telephone
devices
vibrating
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
Roger Lenier
Albert Mathot
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 FR29748E publication Critical patent/FR29748E/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
    • H04R7/04—Plane diaphragms
    • 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
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers
    • H04R7/10—Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR29748D 1924-11-29 1924-11-29 Vibrating membrane for telephone devices Expired FR29748E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR29748T 1924-11-29

Publications (1)

Publication Number Publication Date
FR29748E true FR29748E (en) 1925-09-21

Family

ID=8667725

Family Applications (2)

Application Number Title Priority Date Filing Date
FR588096D Expired FR588096A (en) 1924-11-29 1924-10-27 Vibrating membrane for telephone devices
FR29748D Expired FR29748E (en) 1924-11-29 1924-11-29 Vibrating membrane for telephone devices

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR588096D Expired FR588096A (en) 1924-11-29 1924-10-27 Vibrating membrane for telephone devices

Country Status (1)

Country Link
FR (2) FR588096A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5379525A (en) * 1976-12-23 1978-07-14 Sony Corp Compound diaphtagm for speakers

Also Published As

Publication number Publication date
FR588096A (en) 1925-04-29

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