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US 8,542,863 B2Granted
Low cost motor design for rare-earth-magnet loudspeakers
AssigneeDr. G Licensing, LLC
InventorGodehard A. Guenther
Life of this patent
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Abstract
A loudspeaker magnetic motor utilizes a voice coil with two or more wire coils that are connected in parallel and that are layered on top of one another. The motor utilizes, as a magnetic field source, a permanent magnet and, more particularly, a permanent magnet that includes a rare earth metal such as a neodymium boron iron magnet.
Claims6
A loudspeaker comprising:
- a voice coil, the voice coil comprising:
- a first layer comprising a first wire coil,
- a second layer comprising a second wire coil,
- each layer of wire coil comprising a separate respective wire,
- the layers of wire coils being connected in parallel and the second layer of wire coil being layered on top of the first layer of wire coil,
- wherein a height of the voice coil is greater than a thickness of the voice coil.
3 more elements
Dependencies are inferred from the claim text.