Opposing Rototoms with Adjustable Shaft
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Solution Overview
Problem
Conventional drums lack tunability and resonance adjustment beyond a narrow range, limiting their pitch and sound characteristics, while existing adjustable pitch drums like the rototom have limited mechanisms for varying tension and resonance.
Innovation Solution
The configuration of at least two rototoms with opposing drum heads connected by a T-shaped connector member and a horizontal shaft allows for adjustable separation between the drum heads, enabling easy tension adjustment and simulating the feel of marching bass drums, with optional mesh drum heads and a harness for hands-free use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional drums use fixed head hoops, then the drum structure is simple and stable, but the pitch and resonance adjustment range is limited
Solution Approach 1:
The patent applies the dynamics principle by making the drum head tension adjustable through a threaded rod mechanism. The head hoop can be rotated to move the threaded rod, which in turn adjusts the tension of the drum head dynamically. This allows the pitch and resonance characteristics to be changed during performance, transforming a static drum into a dynamically adjustable instrument.
Solution Approach 2:
The patent implements parameter changes by allowing continuous adjustment of the drum head tension parameter through the threaded rod mechanism. By changing the tension parameter, the pitch and resonance characteristics of the drum are modified. The mechanism enables precise control over the tension parameter, providing a wide range of pitch adjustment capabilities.
2Adaptability or versatility
If adjustable pitch drums like rototom use single-direction alignment, then the structure is simple, but the resonance interaction and simulation capability are limited
Solution Approach 1:
The patent applies asymmetry by positioning the two rototoms in opposite orientations rather than linear alignment. The drum heads face opposite directions, creating an asymmetric configuration that enables unique resonance interactions. This asymmetric arrangement allows the drums to simulate marching bass drum techniques more effectively by creating complementary sound patterns.
Solution Approach 2:
The patent merges the two rototoms into a unified instrument configuration where they work together to simulate marching bass drum sounds. The connector member joins the two rototoms, allowing them to function as a single integrated system that produces complex resonance patterns, effectively combining the capabilities of two drums to achieve the sound of a marching bass drum.
3Ease of operation
If drum heads are positioned close together, then the instrument is compact, but the separation distance for marching simulation is insufficient
Solution Approach 1:
The patent applies dimensionality change by positioning the rototoms in a horizontal arrangement with opposing orientations rather than stacking them vertically or placing them linearly. This spatial arrangement in another dimension allows for sufficient separation distance between drum heads to simulate marching bass drum techniques while keeping the overall instrument footprint manageable. The connector member enables this three-dimensional configuration.
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 configuration allows for adjustable pitch and resonance across a wide range, simulating the feel and sound of marching bass drums without ear-damaging volume, and can be adapted to various drum sizes and types, enhancing practice and performance capabilities.
Implementation Method 1
The pitch changing mechanism consists of a threaded rod adjustably threaded to the supporting structure... Movement of the threaded rod in the supporting structure changes the spacing of the drum head from the drum shell open end, thereby changing the resonance characteristics of the drum assembly
Implementation Method 2
Rotation of the drum head and its clamping hoop about the rod varies the tension of the drum head on the tensioning hoop, thereby changing the pitch of the drum
Data Source
AI summary
A musical instrument has at least a first rototom and a second rototom with their respective drum heads facing an opposite direction from each other. The musical instrument has two rototoms with each rototom having a first hoop supporting a drum head, a spider support with a second hoop, a tension hoop and an annulus. A generally horizontal shaft portion extends between the first hoop and the second hoop, wherein the spider support is movable on the shaft portion to vary a separation distance between the first hoop and the second hoop. A connector member is situated between the annuli of the first and second rototum to support the rototoms with their respective drum heads facing opposite directions.