Magnetic material and sound reproducing device constructed therefrom
First Claim
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1. A SOUND REPRODUCING DEVICE COMPRISING A GENERALLY HOLLOW CYLINDRICAL HOUSING OPEN AT ONE FACE AND CLOSED AT THE OTHER FACE THEREOF, A CENTRAL CORE EXTENDING INWARDLY FROM SAID CLOSED FACE, A DIAPHRAGM IN ENGAGEMENT WITH THE PERIPHERAL EDGES OF SAID OPEN FACE IN SPACED RELATION TO SAID CORE, AND A COIL OF INSULATED WIRE SURROUNDING SAID CORE WITHIN SAID HOUSING AND ADAPTED TO CONDUCT ELECTRIC CURRENT THERETHROUGH, SAID HOUSING, CORE AND DIAPHRAGM COMPRISING MOLDINGS OF A RESILIENTLY DEFORMABLE DISPERSION OF PARTICLES IN A PLASTIC MATRIX, IN WHICH DISPERSION A SUBSTANTIAL PORTION OF SAID PARTICLES ARE SHORT RIGHT CYLINDERS OF A PERMANENT MAGNETIC MATERIAL.
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1 Claim
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1. A SOUND REPRODUCING DEVICE COMPRISING A GENERALLY HOLLOW CYLINDRICAL HOUSING OPEN AT ONE FACE AND CLOSED AT THE OTHER FACE THEREOF, A CENTRAL CORE EXTENDING INWARDLY FROM SAID CLOSED FACE, A DIAPHRAGM IN ENGAGEMENT WITH THE PERIPHERAL EDGES OF SAID OPEN FACE IN SPACED RELATION TO SAID CORE, AND A COIL OF INSULATED WIRE SURROUNDING SAID CORE WITHIN SAID HOUSING AND ADAPTED TO CONDUCT ELECTRIC CURRENT THERETHROUGH, SAID HOUSING, CORE AND DIAPHRAGM COMPRISING MOLDINGS OF A RESILIENTLY DEFORMABLE DISPERSION OF PARTICLES IN A PLASTIC MATRIX, IN WHICH DISPERSION A SUBSTANTIAL PORTION OF SAID PARTICLES ARE SHORT RIGHT CYLINDERS OF A PERMANENT MAGNETIC MATERIAL.
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Current AssigneeWalter S. Blume
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Original AssigneeWalter S. Blume
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InventorsBlume, Walter S.
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Application NumberUS03/477,241Time in Patent Office4,072 DaysField of SearchUS Class Current381/420CPC Class CodesH01F 1/083 in a bonding agentH04R 13/00 Transducers having an acous...H04R 15/00 Magnetostrictive transducer...
