Clockwork Inertia Matching for Minute Hand Shock Stability
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Solution Overview
Problem
Existing clockwork mechanisms experience unintended micro-displacements due to high-energy impacts between the jumper and star wheel, leading to unexpected movements of the minute hand during time correction, particularly when changing time zones.
Innovation Solution
The clockwork mechanism is designed with a driving wheel and driven wheel having a moment of inertia ratio greater than 0.9, ensuring controlled movement by damping unintended impulses through differential inertia, preventing propagation of shocks to other components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the second hour wheel is configured to drive a high-energy complication, then the torque capability is improved, but the impact impulse on the star wheel increases causing unwanted micro-displacements
Solution Approach 1:
The patent applies beforehand cushioning by configuring the star wheel with specific inertia properties before the impact occurs. The star wheel's inertia is designed to be sufficiently high to absorb and dampen the impact impulse from the jumper during time correction, preventing unwanted micro-displacements while allowing the second hour wheel to maintain its torque capability for driving high-energy complications.
2Ease of operation
If the jumper falls abruptly onto the star wheel during time correction, then the time setting operation is simplified, but unintended impulses are transmitted to the minute train causing the minute hand to move
Solution Approach 1:
The patent applies the anti-weight principle by using the star wheel's inertia as a counterbalancing element. The star wheel acts as an inertial counterweight that absorbs the abrupt impulse from the jumper during time correction, preventing the impulse from propagating to the minute train and ensuring the minute hand remains stationary despite the simplified time setting operation.
3Productivity
If repeated impacts of the jumper on the star wheel occur during time correction, then the hour hand can be corrected incrementally, but accumulated micro-displacements occur in the first hour wheel transmitted to the dial
Solution Approach 1:
The patent applies beforehand cushioning by pre-configuring the star wheel with sufficient inertia to handle repeated impacts during time correction. This inertial cushioning prevents accumulated micro-displacements in the first hour wheel, ensuring positioning precision is maintained even when multiple incremental corrections are performed efficiently.
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
The mechanism effectively prevents unintended movements of the driven wheel by absorbing and controlling the impulse, maintaining the minute hand's position stability during time corrections.
Implementation Method 1
the leading mobile and the led mobile are configured to have moments of inertia such that the ratio of the moment of inertia of the led mobile to the moment of inertia of the leading mobile is greater than 0.9
Implementation Method 2
the ratio of the moment of inertia of the driven mobile to the moment of inertia of the leading mobile is greater than 0.9, so as to control the movement of said driven mobile
Data Source
Figure 1~2
AI summary
The present invention proposes a clockwork mechanism (1) comprising a driving element (4) and a driven element (2), said driving element (4) being intended to transmit, upon at least one shock, at least one impulse to said driven element (2) capable of causing the movement of said driven element (2). The driving element (4) and the driven element (2) are configured to have moments of inertia such that the ratio of the moment of inertia of the driven element (2) to the moment of inertia of the driving element (4) is greater than 0.9, so as to control the movement of said driven element (2).