Loud-speaker

294,877. Kunze, W., and Radiofrequenz Ges. July 30, 1927, [Convention date]. Magnetic instruments.-An actuating device for a loud-speaker comprises a reed, one end of which is clamped whilst its other end is adapted to vibrate between magnet pole-pieces, one or both of which carry the actuating coil...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	KUNZE WALTER
Format:	Patent
Sprache:	eng
Schlagworte:	DEAF-AID SETS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS PUBLIC ADDRESS SYSTEMS
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