FR724999A - Improvements in sound recording or reproducing apparatus, preferably electrodynamically driven - Google Patents

Improvements in sound recording or reproducing apparatus, preferably electrodynamically driven

Info

Publication number
FR724999A
FR724999A FR724999DA FR724999A FR 724999 A FR724999 A FR 724999A FR 724999D A FR724999D A FR 724999DA FR 724999 A FR724999 A FR 724999A
Authority
FR
France
Prior art keywords
reproducing apparatus
sound recording
electrodynamically driven
electrodynamically
driven
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.)
AEG AG
Original Assignee
Allgemeine Elektricitaets Gesellschaft
AEG AG
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 Allgemeine Elektricitaets Gesellschaft, AEG AG filed Critical Allgemeine Elektricitaets Gesellschaft
Application granted granted Critical
Publication of FR724999A publication Critical patent/FR724999A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
FR724999D 1931-01-12 1931-10-23 Improvements in sound recording or reproducing apparatus, preferably electrodynamically driven Expired FR724999A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE724999X 1931-01-12

Publications (1)

Publication Number Publication Date
FR724999A true FR724999A (en) 1932-05-06

Family

ID=6634834

Family Applications (1)

Application Number Title Priority Date Filing Date
FR724999D Expired FR724999A (en) 1931-01-12 1931-10-23 Improvements in sound recording or reproducing apparatus, preferably electrodynamically driven

Country Status (1)

Country Link
FR (1) FR724999A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2595497A1 (en) * 1986-03-05 1987-09-11 Plastmetal Sa DYNAMIC SPEAKER FOR ALARMS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2595497A1 (en) * 1986-03-05 1987-09-11 Plastmetal Sa DYNAMIC SPEAKER FOR ALARMS

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