FR848383A - Method of establishing magnetic circuits for telephone headphones and other applications - Google Patents

Method of establishing magnetic circuits for telephone headphones and other applications

Info

Publication number
FR848383A
FR848383A FR848383DA FR848383A FR 848383 A FR848383 A FR 848383A FR 848383D A FR848383D A FR 848383DA FR 848383 A FR848383 A FR 848383A
Authority
FR
France
Prior art keywords
applications
magnetic circuits
establishing magnetic
headphones
telephone
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)
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.)
Societe des Telephones Ericsson SA
Original Assignee
Societe des Telephones Ericsson SA
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 Societe des Telephones Ericsson SA filed Critical Societe des Telephones Ericsson SA
Application granted granted Critical
Publication of FR848383A publication Critical patent/FR848383A/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
    • 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)
FR848383D 1938-07-11 1938-07-11 Method of establishing magnetic circuits for telephone headphones and other applications Expired FR848383A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR848383T 1938-07-11

Publications (1)

Publication Number Publication Date
FR848383A true FR848383A (en) 1939-10-27

Family

ID=9314264

Family Applications (1)

Application Number Title Priority Date Filing Date
FR848383D Expired FR848383A (en) 1938-07-11 1938-07-11 Method of establishing magnetic circuits for telephone headphones and other applications

Country Status (1)

Country Link
FR (1) FR848383A (en)

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