Equation of Time Display Mechanism Using Rotating Supports
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing timepieces do not effectively display the dynamic evolution of the equation of time, making it difficult for users to predict whether the difference between mean solar time and true solar time will increase or decrease.
Innovation Solution
A timepiece with a device comprising a first and second rotating support, where the first support carries a curve representing the equation of time and the second support has an index, allowing the intersection to be visible, enabling the display of the equation of time value and its trend over the months by varying the rotation speeds of the supports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a hand driven by an equation of time cam is used to display the equation of time, then the equation of time value can be displayed, but the user cannot know the trend of the equation of time for the coming months
Solution Approach 1:
The patent transitions from a one-dimensional hand pointer to a two-dimensional display system with a curve representing the equation of time throughout the year. The curve plots months along one axis and equation of time values along the other, allowing users to see both current values and future trends simultaneously by following the curve's path.
Solution Approach 2:
The entire annual curve of the equation of time is displayed in advance on the dial, showing all future values from the current position. This allows users to see the complete trajectory of the equation of time for the remaining months of the year, enabling prediction of future values without additional mechanical components.
2Loss of information
If the entire equation of time curve is displayed on a rotating support, then the user can see the trend evolution, but the reading mechanism becomes more complex
Solution Approach 1:
A transparent index disc with radial graduated scales is introduced as an intermediary element. This index disc rotates independently and allows users to read the equation of time value at the intersection point with the curve, simplifying the reading mechanism while maintaining complete information display.
Solution Approach 2:
The patent replaces complex mechanical reading mechanisms with a visual optical system. The transparent supports and index allow direct visual reading of values at intersection points, eliminating the need for complex mechanical pointers or multiple moving parts to indicate values.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present invention relates to a timepiece comprising a frame and a device (1) for displaying the equation of time. The device (1) for displaying the equation of time comprises a first support (2) and a second support which are superposed, or, respectively, mounted so as to be able to rotate with respect to the frame, the first support (2) bearing a curve (6) that represents the equation of time, and the second support bearing a pointer (12) arranged such that the intersection of the pointer (12) with the curve (6) is visible, and means for driving the first (2) and second supports that are arranged such that the first (2) and second supports rotate at respective speeds that allow the value of the equation of time to be displayed at the intersection of the pointer (12) with the curve (6).