Modular Single-Coil Pickup With Reversible Magnet Core
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Solution Overview
Problem
Existing stringed instrument pickups are not modular or easily upgradable, limiting the range of tonal characters that can be achieved, as they are typically designed and configured at the time of manufacture with limited options for adjusting magnetic polarity or coil connections, which affects humbucking circuits.
Innovation Solution
A modular single-coil electromagnetic pickup design with replaceable core, blade pole, and base, featuring printed circuit coil end contacts and an integral electrostatic shield, allowing for easy inversion of magnetic polarity and coil connections, enabling various magnetic and coil configurations to mimic different pickup types and achieve a wider range of tonal characters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pickups are designed and configured at the time of manufacture with fixed magnetic polarity and coil connections, then manufacturing precision and reliability are improved, but adaptability and versatility are worsened
Solution Approach 1:
The pickup is divided into separate modular components: the magnet assembly with pole pieces can be independently reversed, and the coil connections can be independently configured. This segmentation allows each component to be adjusted without affecting the others, enabling multiple tonal configurations from a single pickup unit while maintaining manufacturing reliability through standardized assembly procedures.
Solution Approach 2:
The pickup design incorporates dynamic reconfigurability through reversible magnet assemblies and switchable coil connections. The magnet can be removed and reinserted in opposite orientations to reverse magnetic polarity, and coil terminals can be reconnected to change winding directions. This dynamic adjustment capability transforms a static manufactured component into a versatile tool that adapts to different tonal requirements.
2Adaptability or versatility
If the entire pickup set is replaced to achieve different tonal characters, then tonal versatility is improved, but cost and device complexity are worsened
Solution Approach 1:
The pickup design implements multi-functionality by enabling a single pickup unit to perform multiple tonal roles through reversible magnet assemblies and reconfigurable coil connections. The same physical pickup can be configured to produce different magnetic polarities and coil winding directions, effectively replacing the need for multiple specialized pickups. This universal design reduces system complexity while expanding tonal versatility.
3Adaptability or versatility
If magnetic polarity is reversed to double the number of available tones, then adaptability is improved, but manufacturing complexity is worsened
Solution Approach 1:
The magnet assembly is designed as a separate, self-contained module that can be independently removed and reinserted in opposite orientations. This segmentation isolates the polarity-reversal function to a simple mechanical operation rather than requiring complex reconfiguration of the entire pickup assembly. The standardized interface between the magnet module and coil assembly maintains manufacturing ease while enabling tone multiplication through polarity reversal.
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
This modular design allows musicians to experiment with different magnetic and coil configurations, doubling the number of available tones by reversing magnetic fields, while maintaining humbucking circuits, and enabling upgrades from passive to active circuits, providing a more extensive range of tonal options without replacing the entire pickup set.
Implementation Method 1
electro-magnetic string vibration pickup
Implementation Method 2
A magnet, which can be reversed and reinserted to reverse the magnetic field
Data Source
AI summary
A modular single-coil electromagnetic stringed-instrument pickup, made to mount in replacement of a standard single-coil pickup, using the similar mounting screws and springs, has a replaceable base, core, blade pole and cover. The core unit has two flat coil forms glued to a bar magnet, which together form a trough for the coil. The outsides of the coil forms have printed circuits which form the coil end contacts and an integral electrostatic shield, with interconnect fixed after the coil is wound, so that the core unit can be flipped to change the magnetic polarity of the pickup, and thus the string vibration signal, while maintaining a humbucking pair circuit with equivalent pickup. The base, which can be either non-magnetic or ferro-magnetic material in different shapes and configurations to shape the magnetic field, contains three conductive index pins, which both make contact with the core unit contacts, and transmit string signals to any circuit or electrical contacts on the bottom of the base. The bottom of the base can be endowed with printed circuits, either on the base itself, or in flexible printed circuit soldered to the index pins.An elastomer shim sits between the core unit and base to give support to the core and microphonic damping. The vertical blade pole sits on top of the core unit, embedded in a non-conductive, non-magnetic horizontal support plate, is held in place by the cover, and separate elastomer shims. The shim between the blade and core unit has a section directly under the blade filled with magnetic material to transmit the magnetic field from the magnet to the blade. The blade pole can be formed, ground or filed to different heights and shapes under the strings, so as to correct for signal strength or to affect the harmonic content of the string signal directly. By trading out the core, base and blade for different types, a wide variety of tonal characters can result, imitating several other types of pickups, as well as providing upgrades from passive pickups to those with active circuits on the base.