Full circumferential geometry voice coil bobbin made with non-metal or metal

An electromagnetic loudspeaker transducer; where its voice coil bobbin has a fully circumferential geometry to provide increased mechanical strength. When the bobbin to be made with sheet metal and sheet metal deep drawn it further provides a stiffened construction by work hardened metal during the...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	KU EDWARD, WEISMAN RICHARD LOUIS
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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