LOUDSPEAKER HAVING ANNULAR DIAPHRAGM WITH DOUBLE VOICE COIL
First Claim
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1. A loudspeaker comprising:
- a. an annular diaphragm including a single vibrating portion having an arcuate cross section generated about an axis of revolution external to said arcuate cross seCtion and coincident with the center of radius of said annular diaphragm, and inner and outer support portions, said diaphragm further having inner and outer projecting rim portions extending from said annular diaphragm between said vibrating portion and said inner and outer support portions respectively;
b. first and second voice coils attached to said inner and outer projecting rim portions respectively, said first and second coils driving said diaphragm in phase therewith, and c. magnetic circuit means having inner and outer concentric gaps, said first and second voice coils being positioned within said inner and outer concentric gaps respectively.
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Abstract
A loudspeaker comprising an annular diaphragm including a vibrating portion having an arcuate shape in cross section, such as a shape of a fraction of a circle or an ellipse, and inner and outer peripheral support portions, voice coils attached to borders between said vibrating portion and said inner and outer support portions of the diaphragm and magnetic circuit means having concentric gaps for receiving said voice coils, respectively, to drive the diaphragm in phase with said voice coils.
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Citations
1 Claim
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1. A loudspeaker comprising:
- a. an annular diaphragm including a single vibrating portion having an arcuate cross section generated about an axis of revolution external to said arcuate cross seCtion and coincident with the center of radius of said annular diaphragm, and inner and outer support portions, said diaphragm further having inner and outer projecting rim portions extending from said annular diaphragm between said vibrating portion and said inner and outer support portions respectively;
b. first and second voice coils attached to said inner and outer projecting rim portions respectively, said first and second coils driving said diaphragm in phase therewith, and c. magnetic circuit means having inner and outer concentric gaps, said first and second voice coils being positioned within said inner and outer concentric gaps respectively.
- a. an annular diaphragm including a single vibrating portion having an arcuate cross section generated about an axis of revolution external to said arcuate cross seCtion and coincident with the center of radius of said annular diaphragm, and inner and outer support portions, said diaphragm further having inner and outer projecting rim portions extending from said annular diaphragm between said vibrating portion and said inner and outer support portions respectively;
Specification
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Current AssigneeHiromi Sotome
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Original AssigneeHiromi Sotome
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InventorsSotome, Hiromi
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Primary Examiner(s)Claffy, Kathleen H.
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Assistant Examiner(s)Kundert, Thomas L.
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Application NumberUS04/887,534Time in Patent Office882 DaysField of Search179/115.5R,115.5DV,115.5VC,115.5H,115.5PS,180,116 181/32US Class Current381/401CPC Class CodesH04R 9/063 using a plurality of acoust...
