Inertial Pendulum Starter Using Twisted Elastic Strands
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Solution Overview
Problem
Existing inertial pendulum exercise and recreational devices require pre-winding, which can be difficult and impractical in certain situations, making it hard for users to initiate and maintain the exercise or amusement activity.
Innovation Solution
A starter apparatus comprising pairs of elastic and inelastic strands, where the elastic strands are wound about each other and the inelastic strands are wound around them, allowing for self-starting and efficient operation of the inertial pendulum by returning to their relaxed state and rewinding, enabling simultaneous unwinding of both types of strands for optimal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional pre-winding mechanism is used, then the inertial pendulum can be set in motion, but it is difficult and impractical in certain situations
Solution Approach 1:
The elastic strands automatically wind themselves around the inertial body during the unwinding phase of motion, eliminating the need for manual pre-winding by the user. The system serves itself by using the stored elastic energy to both drive and rewind the mechanism.
Solution Approach 2:
The transition from static pre-winding to dynamic self-rewinding during motion. The elastic strands dynamically adjust their winding state based on the motion phase, unwinding during power stroke and rewinding during return stroke, making the system adaptable and easier to operate.
2Ease of operation
If elastic strands are used for pre-winding, then the inertial pendulum can start easily, but friction and wear increase
Solution Approach 1:
The strands dynamically switch between winding and unwinding states during each motion cycle. During the unwinding phase, elastic strands store energy; during the return phase, they automatically rewind. This dynamic operation reduces continuous friction contact and distributes wear across multiple cycles.
Solution Approach 2:
The winding and unwinding of strands occurs in periodic cycles synchronized with the inertial body's motion. This periodic action allows the strands to alternate between tension and relaxation states, reducing cumulative friction damage and extending operational life.
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 easy operation and maintenance of inertial pendulums by eliminating the need for pre-winding, allowing beginners to learn more easily and facilitating use in situations where traditional winding is difficult or impractical, while extending the life of the strands through reduced friction and wear.
Implementation Method 1
at least one pair of elastic strands... wherein the elastic strands are wound about each other and stretched until they are approximately parallel to each other
Implementation Method 2
The inertia of the button causes the loop to unwind and then to wind in the opposite direction
Data Source
AI summary
This invention is for a starting apparatus for an inertial pendulum. The apparatus is provided with elastic strands twisted about each other and inelastic strands wound about the twisted strand and the ends of the strands are secured to each other so that when one end of the strands is attached to an inertial element and tension is applied to the other end the strands are caused to untwist and the inertial element caused to rotate.