Wide-ribbon loudspeaker
OwnerAlexei F. Kasatkin, Ilya A. Feldmaninventors
Life of this patent
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Abstract
The wide-ribbon loudspeaker comprises permanent magnets 1 forming an open magnetic system, a sound ribbon 3 exposed to the field of the permanent magnets. The permanent magnet 1 has an internal chamber 2 accommodating the ribbon 3 disposed in a plane parallel to the magnet axis, the side walls of the permanent magnet having sound apertures 4 communicating the internal chamber 2 with external space. The degree of the uniformity of the magnetic field in the internal chamber of the magnet is sufficient for using a sound ribbon of any width permitted by the magnet size.
Claims21
A wide-ribbon loudspeaker, comprising:
- a sound ribbon made of an electrically conductive material and having a first and a second planar surface,
- a first single hollow permanent magnet having a magnetic axis, side walls, an internal chamber defined by said side walls, and sound apertures, said sound apertures being formed in a first and a second side wall of said side walls and opening into said internal chamber;
- said sound ribbon being positioned within said internal chamber and extending in a plane parallel to the magnetic axis, the first planar surface of said sound ribbon being juxtaposed to said first side wall and the second planar surface of said sound ribbon being juxtaposed to said second side wall.
A wide-ribbon loudspeaker, comprising:
- a sound ribbon formed of an electrically conducting material and having two side edges and a first and second planar surface;
- and
- a first single hollow permanent magnet which includes a magnetic axis, two side edges, and two side walls spaced from one another so as to form an internal chamber therebetween, said side walls having sound apertures formed therein which extend between said two side edges and open into said internal chamber, said first planar surface of said sound ribbon being juxtaposed and parallel to said first side wall and said second planar surface of said sound ribbon being juxtaposed and parallel to said second side wall, and the distance between the side edges of said sound ribbon being essentially equal to the distance said sound apertures extend between the two side edges of said hollow permanent magnet, and the magnetic axis of said first hollow permanent magnet being parallel with the planar surfaces of said sound ribbon.
Dependencies are inferred from the claim text.