FR728897A - Aimant de dispositifs électrodynamiques, tels que haut-parleurs, microphones, lecteurs phonographiques, etc. - Google Patents

Aimant de dispositifs électrodynamiques, tels que haut-parleurs, microphones, lecteurs phonographiques, etc.

Info

Publication number
FR728897A
FR728897A FR728897DA FR728897A FR 728897 A FR728897 A FR 728897A FR 728897D A FR728897D A FR 728897DA FR 728897 A FR728897 A FR 728897A
Authority
FR
France
Prior art keywords
loudspeakers
microphones
magnet
electrodynamic devices
phonograph
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)
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of FR728897A publication Critical patent/FR728897A/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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
FR728897D 1931-01-24 1931-12-28 Aimant de dispositifs électrodynamiques, tels que haut-parleurs, microphones, lecteurs phonographiques, etc. Expired FR728897A (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE385205X 1931-01-24
GB440/32A GB399779A (en) 1931-01-24 1932-01-06 Improvements in or relating to magnets, particularly for electrodynamic loudspeakers, microphones, electric pick-ups or the like

Publications (1)

Publication Number Publication Date
FR728897A true FR728897A (fr) 1932-07-12

Family

ID=9704368

Family Applications (1)

Application Number Title Priority Date Filing Date
FR728897D Expired FR728897A (fr) 1931-01-24 1931-12-28 Aimant de dispositifs électrodynamiques, tels que haut-parleurs, microphones, lecteurs phonographiques, etc.

Country Status (3)

Country Link
BE (1) BE385205A (enrdf_load_stackoverflow)
FR (1) FR728897A (enrdf_load_stackoverflow)
GB (1) GB399779A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
BE385205A (enrdf_load_stackoverflow) 1932-01-30
GB399779A (en) 1933-10-12

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