FR2147288B1 - - Google Patents

Info

Publication number
FR2147288B1
FR2147288B1 FR7227229A FR7227229A FR2147288B1 FR 2147288 B1 FR2147288 B1 FR 2147288B1 FR 7227229 A FR7227229 A FR 7227229A FR 7227229 A FR7227229 A FR 7227229A FR 2147288 B1 FR2147288 B1 FR 2147288B1
Authority
FR
France
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
FR7227229A
Other languages
French (fr)
Other versions
FR2147288A1 (de
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
Publication of FR2147288A1 publication Critical patent/FR2147288A1/fr
Application granted granted Critical
Publication of FR2147288B1 publication Critical patent/FR2147288B1/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
    • H04R2209/022—Aspects regarding the stray flux internal or external to the magnetic circuit, e.g. shielding, shape of magnetic circuit, flux compensation coils

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Hard Magnetic Materials (AREA)
FR7227229A 1971-07-29 1972-07-28 Expired FR2147288B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7110445A NL7110445A (de) 1971-07-29 1971-07-29

Publications (2)

Publication Number Publication Date
FR2147288A1 FR2147288A1 (de) 1973-03-09
FR2147288B1 true FR2147288B1 (de) 1980-03-14

Family

ID=19813706

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7227229A Expired FR2147288B1 (de) 1971-07-29 1972-07-28

Country Status (7)

Country Link
US (1) US3891809A (de)
AT (1) AT316668B (de)
DE (1) DE2233656C3 (de)
FR (1) FR2147288B1 (de)
GB (1) GB1386358A (de)
IT (1) IT963399B (de)
NL (1) NL7110445A (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1957765A (en) * 1934-05-08 Magnetomotive force circuits
US2048222A (en) * 1931-10-08 1936-07-21 Deutsche Edelstahlwerke Ag Improvements, in or relating to magnets
US2216961A (en) * 1937-09-30 1940-10-08 Rca Corp Sound translating apparatus
US3462559A (en) * 1964-08-03 1969-08-19 Dallas Richard Wilder Two-piece loudspeaker

Also Published As

Publication number Publication date
DE2233656B2 (de) 1979-04-05
DE2233656A1 (de) 1973-02-08
NL7110445A (de) 1973-01-31
IT963399B (it) 1974-01-10
GB1386358A (en) 1975-03-05
DE2233656C3 (de) 1979-12-06
AT316668B (de) 1974-07-25
US3891809A (en) 1975-06-24
FR2147288A1 (de) 1973-03-09

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Legal Events

Date Code Title Description
ST Notification of lapse