Tunable Clarinet Barrel With Opposite Threads
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Solution Overview
Problem
Existing tunable clarinet barrels face issues with sound quality and intonation due to gap formation and twisting of parts during adjustment, which affects playability and requires complex mounting mechanisms.
Innovation Solution
A clarinet barrel divided into upper and lower parts connected by an adjusting ring with opposite screw threads, allowing axial distance adjustment without twisting, and an anti-twist device to maintain alignment, ensuring continuous inner diameter and improved sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the clarinet barrel is extended by pulling out parts to lower pitch, then the pitch can be adjusted, but gaps and cavities form at connection points which negatively affect sound properties and intonation
Solution Approach 1:
The clarinet barrel is divided into multiple sections (first section, second section, third section) that can be independently adjusted in length. This segmentation allows pitch adjustment by extending or retracting specific sections while maintaining continuous contact between sections through adjustment rings, preventing gap formation at connection points.
Solution Approach 2:
The adjustment rings are nested within the barrel sections, with each adjustment ring positioned inside a corresponding section. The adjustment rings can move independently within their sections to extend or retract the barrel length while maintaining continuous contact between sections, avoiding external gaps that would affect sound quality.
2Reliability
If a metal sleeve is inserted to bridge the cavity during extension, then the sound properties are improved, but the mounting becomes complicated and the metal influences the instrument's sound negatively
Solution Approach 1:
The adjustment rings are extracted from the traditional metal sleeve design and implemented as separate, independently movable components within the wooden barrel sections. This eliminates the need for complex metal sleeve mounting while maintaining continuous contact between sections, and avoids the negative sonic influence of metal by using wood or plastic materials that match the instrument's acoustic properties.
Solution Approach 2:
The adjustment rings serve as intermediary elements between the barrel sections, providing continuous contact and smooth transition between sections during extension. These rings are made of materials compatible with the wooden barrel (wood or plastic) rather than metal, maintaining acoustic consistency while enabling precise length adjustment.
3Ease of operation
If the lower part is rotatably mounted on the adjusting ring to prevent movement, then adjustment is enabled, but the lower part can rotate extremely easily during normal playing which is highly undesirable
Solution Approach 1:
The connection between barrel sections and adjustment rings uses asymmetric threading (right-hand thread for one section, left-hand thread for another). This asymmetric design provides strong mechanical engagement that prevents rotation during playing while still allowing controlled adjustment when deliberate force is applied to the adjustment mechanism.
Solution Approach 2:
The barrel sections are pre-threaded with opposite-handed threads before assembly. This preliminary preparation ensures that when the adjustment ring is rotated, both sections move symmetrically in opposite directions, maintaining alignment and preventing unintended rotation during normal playing while enabling smooth adjustment during tuning.
4Adaptability or versatility
If the upper and lower parts are screwed into the adjusting ring with opposite screw threads, then axial distance can be changed, but the parts may twist in relation to one another affecting alignment
Solution Approach 1:
The barrel sections are pre-threaded with opposite-handed threads (right-hand and left-hand threads) before assembly with the adjustment ring. This preliminary preparation ensures that when the adjustment ring is rotated, both sections move symmetrically in opposite directions, maintaining their alignment and preventing twisting. The opposite threading is designed in advance to work together with the adjustment ring's geometry.
Solution Approach 2:
Anti-twist devices are incorporated into the design of the barrel sections before final assembly. These devices pre-establish geometric constraints that prevent relative rotation between sections during adjustment, ensuring that the sections move purely axially without twisting when the adjustment ring is operated.
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
Enables precise tuning without altering the alignment of parts, maintaining sound quality and preventing gap formation, allowing for easy, one-handed operation during play.
Implementation Method 1
The adjusting ring is connected to the upper part and the lower part via a screw thread and the screw threads have opposite directions of rotation
Data Source
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AI summary
The present invention relates to a tunable clarinet barrel (1) for arrangement between a mouth piece and an upper joint of an (Es, D, C, A, B) clarinet, having a longitudinal axis (L) and a through-passage (100) running in the direction of the longitudinal axis (L), the clarinet barrel (1) being composed of a top part (2) and a bottom part (3), which can be joined along the longitudinal axis (L), and an adjusting ring (4) connecting the top part (2) and the bottom part (3) being provided, the axial distance between the top part (2) and bottom (3) being variable by means of said adjusting ring, characterized in that the adjusting ring (4) is connected to the top part (2) and the bottom part (3) each by way of a screw thread (6, 7) and the screw threads (6, 7) have opposite directions of rotation.