Reversing Configuration Control for String Instrument Pickups
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Solution Overview
Problem
Electric string instruments face challenges in reducing ambient electromagnetic interference (EMI) and achieving desired sound variations due to limitations in pickup coil configurations and signal cancellation methods.
Innovation Solution
A reversing configuration control system for string instruments that utilizes a pair of potentiometers to selectively couple pickup coils in series or parallel, with options for like or opposite polarity, allowing for various sound configurations and effective cancellation of lower fundamental frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If pickup coils are wired in series to produce a fuller and stronger sound, then the output signal strength is improved, but the device complexity increases due to additional switching components
Solution Approach 1:
The patent applies dynamics by making the pickup coil configuration changeable through a rotary switch that allows dynamic switching between series and parallel connections. This enables the system to adapt its electrical configuration based on desired sound characteristics without requiring multiple fixed circuits, thus managing complexity while maintaining versatility.
Solution Approach 2:
The patent implements universality by designing a single pickup assembly that can perform multiple functions through configuration switching. The same physical pickup can operate in series configuration for full sound, parallel configuration for brighter sound, or single-coil mode, eliminating the need for separate pickup assemblies for each function and reducing overall device complexity.
2Illumination intensity
If pickup coils are wired in parallel to produce a brighter sound, then the high frequency response is improved, but the output signal strength decreases
Solution Approach 1:
The patent uses dynamic configuration switching to allow the system to transition between parallel (brighter sound) and series (stronger output) connections based on the player's needs. The rotary switch enables real-time adjustment of the electrical configuration, providing both bright high-frequency response and strong output signal capability when required.
3Ease of operation
If a DPDT switch is used to switch coil configuration between series and parallel, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The patent merges the coil configuration switching function with the existing pickup assembly structure. By integrating the DPDT switch directly into the pickup housing and combining it with the coil wiring and output jack, the system reduces overall complexity compared to having separate switching assemblies. The merged design consolidates multiple functions into a single integrated unit.
4Adaptability or versatility
If reversing of electrical polarity is applied to change sound characteristics, then the sound effect versatility is improved, but the device complexity increases due to additional reversing switches
Solution Approach 1:
The patent implements universality by designing the pickup assembly to perform multiple sound effect functions through a single integrated switching mechanism. The same switch assembly that handles series/parallel configuration also incorporates polarity reversing capability, allowing one mechanical component to provide multiple sound variations (normal tone, reversed polarity, coil tapping) without requiring separate reversing switches for each function.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides a range of sound effects and improved noise cancellation by allowing musicians to customize pickup coil configurations, enhancing the musical performance by reducing unwanted hum and emphasizing higher frequencies and harmonics.
Implementation Method 1
use a pickup to convert the vibration of instrument's strings into electrical impulses. The most commonly used pickups uses the principle of direct electromagnetic induction.
Implementation Method 2
Humbucker pickups have two coils that are arranged with opposite magnetic poling and corresponding oppositely wound coils to produce a differential signal with respect to signals not generated as a result of the magnetic fields of the pickup. Since ambient electromagnetic noise effects both coils equally and since they are oppositely wound, the noise signals induced in the two coils are canceled out.
Data Source
AI summary
A reversing configuration control for string instruments connects to a pair of pickup coils located on a string instrument for selectively electrically configuring and blending the outputs of the pickup coils. The reversing configuration control includes a pair of potentiometers mechanically coupled for concurrent mechanical travel of the respective displaceable contacts thereof. The pair of potentiometers are operatively coupled to the pair of pickup coils and a pair of output terminals to vary the electrical configuration of the pair of pickup coils between (a) the pair of pickup coils being coupled with like polarity in one of series or parallel with respect to the output terminals, or (b) effectively coupling only one of the pair of pickup coils to the output terminals, or (c) the pair of pickup coils being coupled with opposing polarity in one of series or parallel with respect to the output terminals.