FR733865A - Electro-dynamic speaker or microphone comprising a magnet, one of the pole pieces of which is formed by a soft iron ring - Google Patents

Electro-dynamic speaker or microphone comprising a magnet, one of the pole pieces of which is formed by a soft iron ring

Info

Publication number
FR733865A
FR733865A FR733865DA FR733865A FR 733865 A FR733865 A FR 733865A FR 733865D A FR733865D A FR 733865DA FR 733865 A FR733865 A FR 733865A
Authority
FR
France
Prior art keywords
microphone
electro
magnet
pole pieces
soft iron
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 FR733865A publication Critical patent/FR733865A/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
    • H04R9/025—Magnetic circuit
    • 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
    • H04R9/06—Loudspeakers

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)
FR733865D 1931-04-02 1932-03-18 Electro-dynamic speaker or microphone comprising a magnet, one of the pole pieces of which is formed by a soft iron ring Expired FR733865A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE377141X 1931-04-02

Publications (1)

Publication Number Publication Date
FR733865A true FR733865A (en) 1932-10-12

Family

ID=6344366

Family Applications (1)

Application Number Title Priority Date Filing Date
FR733865D Expired FR733865A (en) 1931-04-02 1932-03-18 Electro-dynamic speaker or microphone comprising a magnet, one of the pole pieces of which is formed by a soft iron ring

Country Status (3)

Country Link
US (1) US2047361A (en)
FR (1) FR733865A (en)
GB (1) GB377141A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB635495A (en) * 1947-03-04 1950-04-12 Paul Gustavus Adolphus Helmuth Improvements in magnets
US2894182A (en) * 1955-10-19 1959-07-07 Gen Electric Electro-acoustic transducer
DE3147145C2 (en) * 1981-11-27 1983-10-13 Siemens AG, 1000 Berlin und 8000 München Method for generating a speed-proportional voltage and circuit arrangement for carrying out the method

Also Published As

Publication number Publication date
GB377141A (en) 1932-07-21
US2047361A (en) 1936-07-14

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