Week Number Display Mechanism for Timepiece Integration
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Solution Overview
Problem
Existing mechanisms for displaying the number of the week in a timepiece are inadequate as they require complex mechanisms, can provide false indications during the fifty-second week, and often necessitate coaxial alignment with the date display, making integration difficult and requiring manual or automatic corrections for leap years.
Innovation Solution
A mechanism using three mobiles - one for the day of the week, one for the date, and one for the week number - with cams and pawls to drive a display member in unit or double steps from Sunday to Monday, allowing exact week number indication without coaxial alignment, and accounting for leap years by adjusting the date accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a mechanism uses separate moving parts for day of week and date display, then integration into timepiece movements becomes difficult, but if they are coaxially aligned, then manufacturing and assembly become more complex
Solution Approach 1:
The patent combines the week number display function with the existing day-of-week and date display mechanisms by utilizing their moving parts and cam structures. The week number is displayed on the same dial as the day and date, integrating multiple functions into a unified mechanism rather than adding separate coaxial components.
Solution Approach 2:
The moving parts of the timepiece movement serve multiple functions: the first moving part indicates both the day of the week and drives the week number display, while the second moving part indicates the date and also controls week number transitions. This multi-functionality reduces the need for additional dedicated components.
2Productivity
If the week number display mechanism advances by one step per week between Sunday and Monday, then it provides continuous week indication, but it fails to account for the fifty-third week in years with 53 weeks
Solution Approach 1:
The week number display mechanism dynamically adjusts its advancement based on the date. During the fifty-second week, if the date reaches the 26th or 27th, the mechanism is configured to advance the week number by an additional step to account for the fifty-third week, making the system adaptive rather than static.
Solution Approach 2:
The mechanism uses the date display as feedback to control week number advancement. The cam structure is positioned relative to the date moving part so that specific date positions (26th and 27th) trigger an extra week number step, creating a feedback-based control system that ensures accurate week indication throughout the year.
3Measurement precision
If the mechanism requires manual or automatic correction for leap years and months with varying days, then it can maintain accuracy, but it increases operational complexity and user intervention
Solution Approach 1:
The mechanism automatically handles corrections for leap years and months with varying numbers of days through its cam and pawl configuration. The cam structure is pre-configured to account for the different lengths of months and leap year variations, allowing the mechanism to self-correct without user intervention while maintaining accurate week number indication.
Solution Approach 2:
The cam structure is pre-positioned and pre-configured during manufacturing to anticipate and automatically handle future date transitions, including leap year variations and end-of-month transitions. This preliminary configuration eliminates the need for real-time manual adjustments.
Data Source
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AI summary
A method for displaying the week number in the year, in which a movable display element for the week number in the year is mechanically moved along a scale comprising fifty-three markers separated by display intervals, in successive steps of one step per week during the night from Sunday to the following Monday to display the week numbers "1" to "52" or "53". According to this method, if, while the movable display element for the week number in the year is showing the week number "52", the Sunday on which the display shows a date other than the "26" or "27" of a month, then the movable display element for the week number in the year is mechanically moved during the night from Sunday to the following Monday by a double step, corresponding to two display intervals.