FR2137708A1 - - Google Patents

Info

Publication number
FR2137708A1
FR2137708A1 FR7216680A FR7216680A FR2137708A1 FR 2137708 A1 FR2137708 A1 FR 2137708A1 FR 7216680 A FR7216680 A FR 7216680A FR 7216680 A FR7216680 A FR 7216680A FR 2137708 A1 FR2137708 A1 FR 2137708A1
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.)
Granted
Application number
FR7216680A
Other languages
French (fr)
Other versions
FR2137708B1 (en
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 FR2137708A1 publication Critical patent/FR2137708A1/fr
Application granted granted Critical
Publication of FR2137708B1 publication Critical patent/FR2137708B1/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
    • H04R11/00—Transducers of moving-armature or moving-core type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R11/00—Transducers of moving-armature or moving-core type
    • H04R11/04—Microphones
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49005—Acoustic transducer
FR7216680A 1971-05-12 1972-05-10 Expired FR2137708B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7106490A NL7106490A (en) 1971-05-12 1971-05-12

Publications (2)

Publication Number Publication Date
FR2137708A1 true FR2137708A1 (en) 1972-12-29
FR2137708B1 FR2137708B1 (en) 1978-12-08

Family

ID=19813136

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7216680A Expired FR2137708B1 (en) 1971-05-12 1972-05-10

Country Status (7)

Country Link
US (1) US3858305A (en)
AT (1) AT316667B (en)
DE (1) DE2222823A1 (en)
FR (1) FR2137708B1 (en)
GB (1) GB1376832A (en)
IT (1) IT955343B (en)
NL (1) NL7106490A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4205585A (en) * 1977-03-28 1980-06-03 Hornick Robert A Audio/visual conversion system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2552800A (en) * 1947-12-27 1951-05-15 E A Myers & Sons Magnetic microphone
US2820107A (en) * 1954-12-22 1958-01-14 Sonotonc Corp Electro-mechanical signal transducers
GB932276A (en) * 1962-03-14 1963-07-24 Ericsson Telephones Ltd Electro-acoustic transducers

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1815194A (en) * 1928-02-27 1931-07-21 Archibald A Duncan Telephone receiver
US3491436A (en) * 1964-08-20 1970-01-27 Industrial Research Prod Inc Method of connecting drive pin to an armature of an electroacoustic transducer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2552800A (en) * 1947-12-27 1951-05-15 E A Myers & Sons Magnetic microphone
US2820107A (en) * 1954-12-22 1958-01-14 Sonotonc Corp Electro-mechanical signal transducers
GB932276A (en) * 1962-03-14 1963-07-24 Ericsson Telephones Ltd Electro-acoustic transducers

Also Published As

Publication number Publication date
AT316667B (en) 1974-07-25
DE2222823A1 (en) 1972-11-23
IT955343B (en) 1973-09-29
US3858305A (en) 1975-01-07
FR2137708B1 (en) 1978-12-08
GB1376832A (en) 1974-12-11
NL7106490A (en) 1972-11-14

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Legal Events

Date Code Title Description
ST Notification of lapse