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FR576394A - Perfectionnement aux appareils de vibration électro-magnétiques, notamment aux téléphones - Google Patents

Perfectionnement aux appareils de vibration électro-magnétiques, notamment aux téléphones

Info

Publication number
FR576394A
FR576394A FR576394DA FR576394A FR 576394 A FR576394 A FR 576394A FR 576394D A FR576394D A FR 576394DA FR 576394 A FR576394 A FR 576394A
Authority
FR
France
Prior art keywords
electro
improvement
vibration devices
magnetic vibration
telephones
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
English (en)
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.)
Signal GmbH
Original Assignee
Signal GmbH
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 Signal GmbH filed Critical Signal GmbH
Application granted granted Critical
Publication of FR576394A publication Critical patent/FR576394A/fr
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
    • H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
    • H04R13/02—Telephone receivers

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR576394D 1923-02-12 1924-01-28 Perfectionnement aux appareils de vibration électro-magnétiques, notamment aux téléphones Expired FR576394A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE576394X 1923-02-12

Publications (1)

Publication Number Publication Date
FR576394A true FR576394A (fr) 1924-08-20

Family

ID=6569952

Family Applications (1)

Application Number Title Priority Date Filing Date
FR576394D Expired FR576394A (fr) 1923-02-12 1924-01-28 Perfectionnement aux appareils de vibration électro-magnétiques, notamment aux téléphones

Country Status (1)

Country Link
FR (1) FR576394A (fr)

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