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H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
H04R11/00—Transducers of moving-armature or moving-core type
H04R11/08—Gramophone pick-ups using a stylus; Recorders using a stylus
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
H04R11/00—Transducers of moving-armature or moving-core type
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FR853276D1938-05-211939-04-20Système magnétique oscillant pour haut-parleurs, appareils d'enregistrement et de reproduction des sons et microphones
ExpiredFR853276A
(fr)
Armature pour appareil électro-magnétique, spécialement pour appareil électro-acoustique, destiné par exemple à l'enregistrement ou à la reproduction de pistes sonores