ELECTROMAGNETIC PICKUP FOR STRINGED MUSICAL INSTRUMENT, AND AN ELECTRIC GUITAR
First Claim
1. An electromagnetic pickup for a stringed musical instrument having a longitudinal first coil (2, 2′
- ) having a first end (15, 15′
) and a second end (16, 16′
) and a second longitudinal coil (3, 3′
) having a first end (17, 17′
) and a second end (18, 18′
), both coils having a core region made of at least one permanent magnet or magnetically permeable material (4-8 and 9-13, 48′ and
913′
), and the said first coil core region (4-8, 48′
) has a magnetic polarity opposite to the said second coil core region (9-13, 913′
), and a connection that connects the said two coils (2, 3, 2′
, 3′
) out of phase with one another, either in series or in parallel, so that any extraneous noise or hum is cancelled, characterized by the overlapping area (14) in which the two coils (2, 3, 2′
, 3′
) are partly overlapping each other and the core region (4-8, 48′
) of the said first coil (2, 2′
) is partly overlapping with the core region (9-13, 913′
) of the said second coil (3, 3′
), and by that the coils (2, 2′
, 3, 3′
) having the core regions (4-13, 48′
, 913′
) are set to induce the same voltage in the overlapping area (14) that the coils (2, 2′
, 3, 3′
) induce outside the overlapping area (14).
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Accused Products
Abstract
An electromagnetic pickup for a musical instrument, has two coils (2, 3) with pole pieces (4-8, 9-13) in their core regions and a connection that connects the two coils together, out of phase, in series or in parallel, so that they cancel each others extraneous noise and hum. To accomplish a noise-free pickup with the clarity and dynamics of a single coil pickup, and a uniform output level throughout its longitudinal axis, the coils are partly overlapping each other, the pole pieces in the core region of the first coil are partly overlapping with the pole pieces in the core region of the second coil, and the coils (2, 3) with the pole pieces (6-8, 1-13) induce the same voltage in the overlapping area (14) as the voltage induced by the coils and the pole pieces in their core regions outside the overlapping area (14).
-
Citations
19 Claims
-
1. An electromagnetic pickup for a stringed musical instrument having a longitudinal first coil (2, 2′
- ) having a first end (15, 15′
) and a second end (16, 16′
) and a second longitudinal coil (3, 3′
) having a first end (17, 17′
) and a second end (18, 18′
), both coils having a core region made of at least one permanent magnet or magnetically permeable material (4-8 and 9-13, 48′ and
913′
), and the said first coil core region (4-8, 48′
) has a magnetic polarity opposite to the said second coil core region (9-13, 913′
), and a connection that connects the said two coils (2, 3, 2′
, 3′
) out of phase with one another, either in series or in parallel, so that any extraneous noise or hum is cancelled, characterized by the overlapping area (14) in which the two coils (2, 3, 2′
, 3′
) are partly overlapping each other and the core region (4-8, 48′
) of the said first coil (2, 2′
) is partly overlapping with the core region (9-13, 913′
) of the said second coil (3, 3′
), and by that the coils (2, 2′
, 3, 3′
) having the core regions (4-13, 48′
, 913′
) are set to induce the same voltage in the overlapping area (14) that the coils (2, 2′
, 3, 3′
) induce outside the overlapping area (14). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 17, 18)
- ) having a first end (15, 15′
-
14. An electric guitar, having the said pickup, with a first longitudinal coil (2, 2′
- ) having a first end (15, 15′
) and a second end (16, 16′
), and a second longitudinal coil (3, 3′
) having a first end (17, 17′
) and a second end (18, 18′
), where both coils (2, 3, 2′
, 3′
) have pole pieces (4-8 and 9-13, 48 and 913) in their core region made of magnetically permeable material, and the said first pole pieces (4-8, 48′
) of the said first core region have an opposite magnetic polarity compared to the said second pole pieces (9-13;
913) in the said second core region, and a connection that connects the two coils (2, 2′
, 3, 3′
) to one another out of phase either in parallel or in series, so that they cancel each other'"'"'s extraneous noise and hum, characterized by the area (14) where the coils (2, 3, 2′
, 3′
) are partly overlapping each other and the first pole pieces (4-8, 48) in the core region of the first coil (2, 2′
) are partly overlapping the pole pieces (9-13, 913′
) in the core region of the second coil (3, 3′
), and by that in the overlapping area (14), the coils (2, 3, 2′
, 3′
) with the pole pieces (4-13, 48′
, 913′
) in their core regions induce a voltage of the same level that is induced by the coils (2, 3, 2′
, 3′
) with the pole pieces (4-13, 48′
, 913′
) in their core regions outside the overlapping area (14). - View Dependent Claims (15, 16, 19)
- ) having a first end (15, 15′
Specification