Electromagnetic pickup for stringed musical instruments
First Claim
1. An electromagnetic pickup device for a stringed musical instrument comprising:
- a primary bobbin having an elongated body around which is wrapped a first coil of wire;
magnetic means for generating a magnetic field around said primary bobbin such that vibrations of said instrument'"'"'s strings causes variations in said magnetic field which are sensed by said primary bobbin and converted into electrical signals for amplification; and
a secondary bobbin having a body around which is wrapped a second coil of wire, said body being significantly smaller than said elongated body of said primary bobbin, said secondary bobbin positioned in close proximity to said primary bobbin to cancel an audible hum caused by frequencies radiating from surrounding electromagnetic generating sources.
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Accused Products
Abstract
An electromagnetic pickup for stringed musical instruments has a primary bobbin having an elongated body with holes for receiving at least one pole piece or magnet and a coil of wire wrapped around the elongated body. At least one magnet is positioned in close proximity to the primary bobbin to create a magnetic field around the primary bobbin. In addition, the pickup includes a secondary bobbin having a body significantly smaller than that of the primary bobbin; a coil of wire is wrapped around the smaller body. The secondary, or hum-cancelling, bobbin is positioned in close proximity to the primary bobbin solely to cancel an audible hum caused by a power supply used in the amplification equipment and/or other environmental sources.
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Citations
9 Claims
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1. An electromagnetic pickup device for a stringed musical instrument comprising:
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a primary bobbin having an elongated body around which is wrapped a first coil of wire; magnetic means for generating a magnetic field around said primary bobbin such that vibrations of said instrument'"'"'s strings causes variations in said magnetic field which are sensed by said primary bobbin and converted into electrical signals for amplification; and a secondary bobbin having a body around which is wrapped a second coil of wire, said body being significantly smaller than said elongated body of said primary bobbin, said secondary bobbin positioned in close proximity to said primary bobbin to cancel an audible hum caused by frequencies radiating from surrounding electromagnetic generating sources. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification