FR615657A - écouteur électro-magnétique - Google Patents

écouteur électro-magnétique

Info

Publication number
FR615657A
FR615657A FR615657DA FR615657A FR 615657 A FR615657 A FR 615657A FR 615657D A FR615657D A FR 615657DA FR 615657 A FR615657 A FR 615657A
Authority
FR
France
Prior art keywords
electro
earpiece
magnetic
magnetic earpiece
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
English (en)
Inventor
Charles Bassompierre
Louis Vergnaud
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 filed Critical
Application granted granted Critical
Publication of FR615657A publication Critical patent/FR615657A/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
    • 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
    • H04R7/22—Clamping rim of diaphragm or cone against seating
FR615657D 1926-05-05 1926-05-05 écouteur électro-magnétique Expired FR615657A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR615657T 1926-05-05

Publications (1)

Publication Number Publication Date
FR615657A true FR615657A (fr) 1927-01-13

Family

ID=8981063

Family Applications (1)

Application Number Title Priority Date Filing Date
FR615657D Expired FR615657A (fr) 1926-05-05 1926-05-05 écouteur électro-magnétique

Country Status (1)

Country Link
FR (1) FR615657A (fr)

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