PICKUP FOR STRINGED INSTRUMENT

• US 20140245877A1
• Filed: 03/04/2013
• Published: 09/04/2014
• Est. Priority Date: 03/04/2013
• Status: Active Grant

• Current Assignee: William Gelvin
• Original Assignee: William Gelvin
• Inventors: Gelvin, William
• Granted Patent: US 9,165,545 B2
• Time in Patent Office: Days
• US Class Current: 84/727
• CPC Class Codes: G10H 2220/505 Dual coil electrodynamic string transducer, e.g. for humbucking, to cancel out parasitic magnetic fields
• CPC Class Codes: G10H 3/181 Details of pick-up assemblies

Abstract

A pickup for engagement to the body of an instrument having metal strings, such as a guitar in position proximate to the strings. The pickup features a coil having loops of wire wound around a recess having a magnetic member therein which projects a magnetic field to magnetize the strings. The electrical current in said coil wire induced by a movement the strings generates a first electrical signal from said first end of the coil wire and corresponding AC second electric signal from said second end of the coil wire. One or a plurality of tap wires engaged to the coil wire at tap points, provide additional individual electronic signals which may be mixed, or may be communicated individually to an amplifier or mixing component.

Claims

1. A pickup configured for engagement to a body of an instrument having metal strings, to an as-used position proximate to said strings, comprising:

a coil structure comprising a plurality of loops of a wire, said loops defining a conducting pathway extending from a first end of said wire to a second end of said wire;

said coil structure defining a recess surrounded by said plurality of loops of wire,

a portion or all of a magnetic member positioned within the recess;

said magnetic member configured to project a magnetic filed sufficient to magnetize the strings of said;

an electrical current in said coil wire induced by a movement of at least one of said strings, generating first electrical signal from said first end of said wire, and a second electric signal from said second end of said wire;

an electrical connection configured to communicate said first electrical signal and said second electrical signal to an electronic component for amplification or electronic mixing;

said first electronic signal in an electrical engagement with a first conductor of said electrical connection;

said second electronic signal in an electrical engagement with a second conductor of said electrical connection;

at least one tap wire having a first end electrically connected to said conducting pathway at a tap point at one of said plurality of windings, said tap point located between said first end and said second end of said coil wire;

said electrical current in said coil wire induced by said movement of said strings within said magnetic field, generating a communication of an additional electronic signal from said coil wire at said tap point, to a second end of said tap wire; and

an electrical connector operatively connected with said second end of said tap wire for communicating said additional electronic signal to one of, said first conductor of said electrical connection, said second conductor of said electrical connection.

2. The pickup device of claim 1, additionally comprising:

said electrical connector being a switch, said switch being in electrical communication with said first conductor and said second conductor and said second end of said tap wire; and

said switch operable to electrically connect said second end of said tap wire with either of said first conductor or said second conductor.

3. The pickup device of claim 1, additionally comprising:

a plurality of said tap wires, each engaged at a respective said tap points, between said first end and said second end of said coil wire;

said electrical current in said coil wire induced by said movement of said strings within said magnetic field, communicating an individual respective said additional electronic signal, from said coil wire at each said respective tap point, to each respective said second end of each respective one of said plurality of said tap wires; and

said electrical connection having a respective additional said conductor communicating to said electronic component for amplification or electronic mixing, each respective said additional conductor having a respective electrical engagement with one respective said second end of one of said plurality of said tap wires;

each said additional conductor providing a pathway to communicate a said respective said additional electronic signal from a respective second end of a said tap wire, to said electronic component, whereby each respective said electronic signal from each respective additional said tap wire, is communicable to said electronic component along a respective individual said conductor.

4. The pickup device of claim 3, additionally comprising:

said respective electrical engagement of each respective said additional conductor having with one respective said second end of one of said plurality of said tap wires being a cable connector engaged on a first end to a plurality of said conductors and on a second end engageable to said first end with corresponding individual said tap wires from said plurality of tap wires.

5. The pickup device of claim 1, additionally comprising:

said plurality of loops of a wire, engaged in a pathway around a circumference of a bobbin; and

said bobbin having an interior aperture defining said recess.

6. The pickup device of claim 1, additionally comprising:

a plurality of sets of pole pieces equal to a number of said strings;

first ends of said pole pieces positioned proximate to said magnetic member providing means for magnetically polarizing said pole pieces;

said pickup in said as-used position, positioning one each of individual respective second ends of said pole pieces, adjacent to a respective one of said strings;

said magnetic member projecting said magnetic filed sufficient to magnetize the strings through said pole pieces; and

whereby said electrical current is induced in said coil wire by a said movement of at least one of said strings, adjacent to one of said second ends of said pole pieces.

7. The guitar pickup device of claim 5 additionally comprising:

said coil structure of said plurality of loops of said wire, defining said conducting pathway, being formed in successive layers of said loops of said wire, surrounding said recess;

a first layer of said plurality of loops of wire being formed of said wire in a first gauge;

a second layer of said plurality of loops of wire surrounding said first layer being formed of a second gauge of said wire, said second gauge being larger or smaller than said first gauge;

said tap point positioned at a transition point of said wire along said conductive pathway from said first gauge of said first layer to said second gauge of said second layer; and

said successive layers of said wire in said first gauge and said second gauge providing means for varying the induced voltage in portions of said conductive pathway in said first layer from the induced voltage of said second layer.

8. The guitar pickup device of claim 6 additionally comprising:

said coil structure of said plurality of loops of said wire, defining said conducting pathway, being formed in successive layers of said loops of said wire, surrounding said recess;

a first layer of said plurality of loops of wire being formed of said wire in a first gauge;

a second layer of said plurality of loops of wire surrounding said first layer being formed of a second gauge of said wire, said second gauge being larger or smaller than said first gauge;

said tap point positioned at a transition point of said wire along said conductive pathway from said first gauge of said first layer to said second gauge of said second layer; and

said successive layers of said wire in said first gauge and said second gauge providing means for varying the induced voltage in portions of said conductive pathway in said first layer from the induced voltage of said second layer.

9. The guitar pickup device of claim 5 additionally comprising:

said coil structure of said plurality of loops of said wire, defining said conducting pathway, being formed in successive layers of said loops of said wire, surrounding said recess;

a first layer of said plurality of loops of wire being formed of said wire extending from a first end, and terminating at a second end engaged with said first said tap point;

said first tap point connected to a first end of a said first tap wire;

a second end of said first tap wire extending from said coil;

a second layer of said plurality of loops of said wire, said second layer having a first end extending from said coil from a position adjacent to said first tap point, said second layer surrounding said first layer and having a second end of said wire forming said second layer terminating at a second tap point;

a first end of a second tap wire engaged to said second tap point;

a second end of said second tap wire exiting from said coil;

a third layer of said plurality of loops of said wire, said third layer having a first end extending from said coil from a position adjacent to said second tap point, said third layer surrounding both said first layer said second layer, and having a second end of said wire forming said third layer terminating exterior to said coil;

a switch having a first position and a second position;

said switch in said first position connecting said second end of said first tap wire to said first end of said wire forming said second layer, and connecting said second end of said second tap wire to said first end of said wire forming said third layer;

said switch in said second position connecting said second end of said first tap wire to said first end of said wire forming said third layer;

said conductive pathway formed by said wire forming said first layer and said second layer and said third layer with said switch in said first position;

said conductive pathway formed by said wire forming said first layer and said third layer with said switch in said second position; and

a changing of said switch between said first position and said second position providing means for varying the induced voltage in said conductive pathway and concurrent change in the first electrical signal from said first end of said wire, and a second electric signal from said second end of said wire forming said conductive pathway.