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US 10,522,126 B1Granted
Hum-cancelling system
OwnerCarey J. Nordstrandinventor
Life of this patent
Estimating the term…
Abstract
A hum-cancelling system includes two or more hum-cancelling coils configured in a distributed manner, connected in series with each other. The hum-cancelling coils form a series circuit that is electrically connected to at least one pickup. Each hum-cancelling coil includes a top plate, a bottom plate, and a coil of wire wrapped between the top plate and the bottom plate.
Claims17
A hum-cancelling system comprising:
- a first hum-cancelling coil, comprising:
- a top plate;
- a bottom plate;
- and
- a coil of wire wrapped between the top plate and the bottom plate;
- and
- a second hum-cancelling coil, comprising:
- a top plate;
- a bottom plate;
- and
- a coil of wire wrapped between the top plate and the bottom plate;
- wherein:
- the coil of wire of the first hum-cancelling coil is operationally configured to wire in series with the coil of wire of the second hum-cancelling coil;
- the combined series impedance of the first hum-cancelling coil and the second hum-cancelling coil the coil is configured to exhibit a total impendence up to a nominal impedance of one single-coil pickup of a stringed musical instrument to which the hum-cancelling system is installed;
- and
- when installed in a stringed musical instrument:
- the coil of wire of the first hum-cancelling coil is wound in the same direction as the coil of wire of the second hum-cancelling coil;
- the first hum-cancelling coil is spaced from the second hum-cancelling coil;
- the first hum-cancelling coil is positioned proximate to a first pickup;
- and
- the second hum-cancelling coil is positioned proximate to a second pickup.
18 more elements
A hum-cancelling system comprising:
- a first hum-cancelling coil, comprising:
- a top plate;
- a bottom plate;
- and
- a coil of wire wrapped between the top plate and the bottom plate;
- a second hum-cancelling coil, comprising:
- a top plate;
- a bottom plate;
- and
- a coil of wire wrapped between the top plate and the bottom plate;
- a first pickup comprising:
- a top flatwork;
- a bottom flatwork;
- a coil assembly comprising a coil of wire wrapped around at least one magnetic pole;
- a second pickup comprising:
- a top flatwork;
- a bottom flatwork;
- a coil assembly comprising a coil of wire wrapped around at least one magnetic pole;
- wherein, when installed in a stringed musical instrument:
- the coil of wire of the first hum-cancelling coil is operationally configured to wire in series with the coil of wire of the second hum-cancelling coil to define a hum-cancelling circuit;
- the coil of wire of the first hum-cancelling coil is wound in the same direction as the coil of wire of the second hum-cancelling coil;
- a wind direction of the first pickup is opposite a wind direction of the first hum-cancelling coil and the second hum-cancelling coil;
- and
- the hum-cancelling circuit is switchably connected to at least one of the first pickup and the second pickup.
21 more elements
A stringed musical instrument, comprising:
- an instrument body;
- a first hum-cancelling coil mounted to the instrument body;
- a second hum-cancelling coil mounted to the instrument body spaced apart from the first hum-cancelling coil so as to not touch or overlap;
- a first pickup mounted to the instrument body over the first hum-cancelling coil;
- a second pickup mounted to the instrument body over the second hum-cancelling coil;
- a pickup selector switch that allows selecting at least one of the first pickup and the second pickup for output;
- and
- a circuit that electrically wires the first hum-cancelling coil in series with the second hum-cancelling coil, and wherein the circuit is electrically coupled to at least one of the first pickup and the second pickup regardless of a position of the pickup selector switch.
5 more elements
Dependencies are inferred from the claim text.