FR690512A - Hollow cylinder intended for the vibrating member of an electrodynamic loudspeaker - Google Patents

Hollow cylinder intended for the vibrating member of an electrodynamic loudspeaker

Info

Publication number
FR690512A
FR690512A FR690512DA FR690512A FR 690512 A FR690512 A FR 690512A FR 690512D A FR690512D A FR 690512DA FR 690512 A FR690512 A FR 690512A
Authority
FR
France
Prior art keywords
hollow cylinder
vibrating member
electrodynamic loudspeaker
cylinder intended
intended
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.)
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 FR690512A publication Critical patent/FR690512A/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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/046—Construction

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
FR690512D 1929-03-02 1930-02-24 Hollow cylinder intended for the vibrating member of an electrodynamic loudspeaker Expired FR690512A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL355776X 1929-03-02

Publications (1)

Publication Number Publication Date
FR690512A true FR690512A (en) 1930-09-23

Family

ID=19785213

Family Applications (1)

Application Number Title Priority Date Filing Date
FR690512D Expired FR690512A (en) 1929-03-02 1930-02-24 Hollow cylinder intended for the vibrating member of an electrodynamic loudspeaker

Country Status (4)

Country Link
US (1) US2020814A (en)
BE (1) BE368021A (en)
FR (1) FR690512A (en)
GB (1) GB355776A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2949115C3 (en) * 1979-12-06 1982-04-22 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Dynamic transducer with a voice coil in an air gap filled with a magnetic liquid and method for filling and / or evenly distributing this liquid

Also Published As

Publication number Publication date
GB355776A (en) 1931-08-28
BE368021A (en)
US2020814A (en) 1935-11-12

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