FR664962A - Improvement in electromagnetic devices particularly applicable to headphones - Google Patents

Improvement in electromagnetic devices particularly applicable to headphones

Info

Publication number
FR664962A
FR664962A FR664962DA FR664962A FR 664962 A FR664962 A FR 664962A FR 664962D A FR664962D A FR 664962DA FR 664962 A FR664962 A FR 664962A
Authority
FR
France
Prior art keywords
headphones
improvement
particularly applicable
electromagnetic devices
devices particularly
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
Andre-Auguste Gillet
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 FR664962A publication Critical patent/FR664962A/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)
  • Coils Or Transformers For Communication (AREA)
FR664962D 1928-03-10 1928-03-10 Improvement in electromagnetic devices particularly applicable to headphones Expired FR664962A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR529541X 1928-03-10

Publications (1)

Publication Number Publication Date
FR664962A true FR664962A (en) 1929-09-12

Family

ID=8922759

Family Applications (1)

Application Number Title Priority Date Filing Date
FR664962D Expired FR664962A (en) 1928-03-10 1928-03-10 Improvement in electromagnetic devices particularly applicable to headphones

Country Status (2)

Country Link
DE (1) DE529541C (en)
FR (1) FR664962A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3295578A (en) * 1964-06-29 1967-01-03 Emile A Maloof Fastening device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3295578A (en) * 1964-06-29 1967-01-03 Emile A Maloof Fastening device

Also Published As

Publication number Publication date
DE529541C (en) 1931-07-15

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