Magnetic pickup for electric guitars
OwnerDaniel K. Armstronginventor
Life of this patent
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Abstract
A magnetic pickup for a stringed musical instrument, comprising a polar magnet having a polar axis extending across its thinnest dimension, a coil having a magnetically permeable pole piece extending upwardly for positioning adjacent an instrument string, with the polar magnet positioned longitudinally parallel to the coil and having its polar axis perpendicular to the winding axis of the coil. Positioned within the coil is either a magnet or a pole piece. The pickup may include a plurality of coils and magnets arranged as described above to increase the effectiveness of the pickup. Also disclosed is a method for manufacturing the pickup which includes setting the pole piece, coil, magnet, and mounting bracket in a mold cavity, and casting the entire unit with potting material.
Claims13
A magnetic pickup for a stringed musical instrument, comprising in combination:
- a polar bar magnet having a longitudinal axis, a vertical axis, and a transverse polar axis extending across the thinnest cross-sectional dimension of said magnet;
- a coil having a winding axis and a hollow center;
- a magnetically permeable pole piece separate from said magnet and extending upwardly parallel to said magnet vertical axis for positioning adjacent an instrument string;
- and
- with said magnet positioned longitudinally parallel to said coil having said polar axis perpendicular to the winding axis of said coil so that the only magnetic field in the pickup is that provided by said magnet along said transverse polar axis, with one of said magnet and pole piece placed within said hollow center of said coil and with the other of said magnet and pole piece placed outside said coil with the field from said magnet entering said pole piece through said coil.
A magnetic pickup for a string instrument, comprising in combination:
- a coil having a first winding axis and having a plurality of elongate cores positioned adjacent said coil parallel to each other and said first axis, and spaced from each other along a second axis perpendicular to said first axis;
- and
- a permanent bar magnet positioned adjacent said coil and having a magnetic field along a third axis substantially perpendicular to said first and second axes so that the only magnetic field in the pickup is that provided by said magnet along said third axis, with said cores separate from said magnet;
- with said magnetic field through the smallest dimension of said magnet, and with one of said cores and magnet positioned within said coil and with the other of said cores and magnet positioned outside said coil with the field from said magnet entering said cores through said coil.
Dependencies are inferred from the claim text.