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US 8,300,874 B2Granted
Loudspeaker having adjustable magnet
OwnerJames F Winterinventor
Life of this patent
Estimating the term…
Abstract
Loudspeakers are provided that include a moveable magnet that can be positioned relative to the speaker piston. A user of the loudspeaker may position the moveable magnet to achieve a desired tone, distortion, or other sound without requiring the loudspeaker to be operated at an undesirable sound pressure level. The loudspeaker may include an indicator showing the relative position of the magnet relative to the piston to the user.
Claims19
A loudspeaker comprising:
- a speaker body;
- a speaker cone disposed at least partially within the speaker body, the speaker cone having a narrow end and a wide end;
- a cylindrical magnet disposed adjacent to the narrow end of the speaker cone, the cylindrical magnet moveable from a first position to a second position;
- a piston connected to the narrow end of the speaker cone, the piston comprising:
- a permanent magnet;
- and
- a wire wrapped around the piston;
- a first portion of the piston being disposed within the cylindrical magnet when the cylindrical magnet is in the first position, and a second portion of the piston being disposed within the cylindrical magnet when the cylindrical magnet is in the second position, the first portion being larger than the second portion;
- and
- an indicator moveably connected to the cylindrical magnet, the indicator comprising:
- an indicator strip;
- and
- a moveable arm in physical communication with the cylindrical magnet;
- an end of the moveable arm being disposed in a first region of the indicator strip when the cylindrical magnet is in the first position, and in a second region of the indicator strip when the cylindrical magnet is in the second position, the indicator strip identifying the position of the cylindrical magnet relative to the piston.
11 more elements
A device comprising:
- an enclosure;
- a speaker cone disposed at least partially within the enclosure;
- an outer magnet;
- and
- a piston connected to the speaker cone and disposed at least partially within the outer magnet, the outer magnet being moveable from a first fixed position in which a first portion of the piston is disposed within the outer magnet, to a second fixed position in which a second portion of the piston is disposed within the outer magnet, the second portion being less than the first portion.
2 more elements
A device comprising:
- an enclosure;
- a speaker cone disposed at least partially within the enclosure;
- an outer magnet;
- a piston connected to the speaker cone and disposed at least partially within the outer magnet;
- the outer magnet or the piston being moveable from a first preset position to a second preset position relative to the other, wherein the device is configured to operate in both the first preset position and the second preset position;
- and
- means for positioning the outer magnet relative to the piston so that more or less of the piston is disposed within the outer magnet.
4 more elements
Dependencies are inferred from the claim text.