Rotary String Tension Regulator for Tremolo Systems
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Solution Overview
Problem
Existing string tension adjustment systems for guitars, such as the D-Tuna, require external tools for calibration, are prone to misalignment, and have limited range, making them cumbersome and unreliable, especially in live performances, and are not compatible with all tremolo systems.
Innovation Solution
A compact tremolo string tension regulator with a rotatable body and axial hole that changes string tension by revolving around an axis, eliminating the need for external tools and allowing retrofitting to various tremolo systems, including keyless locking systems, without requiring guitar body modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an integrated fine tuner with a miniature set screw is used (Benson D-Tuna), then pitch calibration is possible, but external tools are required and the adjustment range is very limited
Solution Approach 1:
The invention extracts the fine tuning function from the traditional integrated set screw mechanism and relocates it to the tuning key itself. The tuning key incorporates a fine tuning slot that receives a fine tuning lever, allowing the fine tuning function to be integrated into the key rather than requiring a separate set screw mechanism. This enables tool-free operation while providing sufficient adjustment range.
Solution Approach 2:
Instead of having a set screw mechanism that requires external tools for adjustment, the invention inverts the approach by making the tuning key itself the adjustment mechanism. The fine tuning lever on the key provides the calibration capability directly at the point of operation, eliminating the need for separate calibration tools and providing adequate adjustment range.
2Measurement precision
If a linear motion drop tuner is used (Benson D-Tuna), then pitch adjustment is possible, but the device extends beyond the tremolo cavity perimeter and prevents upward tremolo movement
Solution Approach 1:
The invention transitions from linear motion to rotational motion for pitch adjustment. The tuning key rotates within the tremolo cavity, with the string tension regulator rotating on a pivot point. This rotational mechanism provides the necessary adjustment range while maintaining a compact form factor that fits within the tremolo cavity and does not interfere with upward tremolo movement.
Solution Approach 2:
Instead of extending linearly beyond the cavity as with sliding mechanisms, the invention uses rotational motion that occurs within the circular boundary of the tremolo cavity. The tuning key and string tension regulator rotate in place, providing the same functional range of motion without the linear extension that would interfere with tremolo operation.
3Measurement precision
If a set screw mechanism is used (Benson D-Tuna), then fine tuning is possible, but the set screw can vibrate out of adjustment, become loosened, or fall out during performance
Solution Approach 1:
The invention merges the fine tuning function with the main tuning key operation. The fine tuning lever is integrated into the tuning key assembly, and both the coarse tuning (via key rotation) and fine tuning (via lever movement in the fine tuning slot) occur within the same mechanism. This unified design eliminates separate adjustment components that could loosen or fall out, as the fine tuning is accomplished through the same rotational motion that secures the key in place.
Solution Approach 2:
The tuning key itself provides both the coarse and fine tuning functions without requiring separate adjustment mechanisms. The fine tuning lever operates within the fine tuning slot on the key, allowing the key to self-adjust and self-secure in a single operation. This eliminates the need for separate set screws that could vibrate loose or fall out during performance.
4Measurement precision
If an integrated fine tuner is used (McCabe), then pitch calibration is possible, but external tools are still required and the system cannot be retrofitted to existing locking tremolos
Solution Approach 1:
The invention creates a universal tuning key design that can be retrofitted to various tremolo systems including locking tremolos. The string tension regulator uses a pivot-based rotational mechanism that can be adapted to different mounting configurations, and the tuning key incorporates both standard and fine tuning functions that work with existing tremolo architectures. This multi-functional design allows retrofitting to vintage and modern systems without requiring complete system replacement.
Data Source
AI summary
Compact string tension regulation apparatus for tremolo systems comprising a rotatable body having a protrusion extending from the body. A bearing surface of the protrusion may be selectively engaged with a tremolo to provide a plurality of string tensions.