Bi-axial Escapement Segmentation for Precision Oscillation
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Solution Overview
Problem
Existing escapement devices in timepieces, such as those disclosed in EP 1 983 389, have complex architectures that are difficult to tune, leading to inefficiencies and a lack of precision in maintaining regular oscillations of the regulating member.
Innovation Solution
A simplified escapement device with two escapement wheel sets, each comprising a wheel and a coupling wheel, mounted coaxially on separate shanks, and an anchor with pallets, which minimizes disturbance to the regulating member by direct mechanical connection and angular offsetting, allowing precise energy transmission without the need for lubrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a complex escapement architecture is used (as in EP 1 983 389), then the structure can provide energy transmission, but the device becomes difficult to tune and regulate, reducing precision
Solution Approach 1:
The escapement is divided into two independent but synchronized escapement mobiles, each with its own escape wheel and coupling wheel. This segmentation allows each half to be simple and easy to regulate, while the overall system maintains precision through their coordinated operation with the single anchor and pallets.
Solution Approach 2:
Two escapement mobiles are merged into a single integrated system sharing common elements (anchor, pallets, regulating organ) while maintaining independent escape wheels. This combination achieves both simplicity in individual components and precision in overall operation.
2Reliability
If traditional escapement designs are used, then energy transmission can be achieved, but the structure disturbs the regulating organ, reducing reliability and efficiency
Solution Approach 1:
The harmful disturbing elements are extracted and eliminated from the traditional escapement design. The invention uses a simplified structure with direct mechanical connection that minimizes interference with the regulating organ's natural oscillations, improving reliability and reducing energy loss.
Solution Approach 2:
The escapement mobiles are designed to work in coordination with the regulating organ's natural oscillations rather than imposing external disturbances. The system serves itself by utilizing the inherent motion of the balance wheel to drive the escape wheels, minimizing harmful interactions.
3Ease of manufacture
If a simple escapement structure is used, then ease of manufacture and reliability improve, but precision in maintaining regular oscillations may be compromised
Solution Approach 1:
The escapement is segmented into two identical, simple escapement mobiles that are easier to manufacture individually. The precision is achieved not through complexity of individual parts but through the precise relationship and synchronization between the two segmented units.
Solution Approach 2:
The invention changes the fundamental parameter of escapement operation by using two escape wheels instead of one, and by introducing coupling wheels. This parameter change allows simple individual components to achieve high overall precision through their coordinated interaction.
Data Source
Figure 1~4
Figure 5~6
AI summary
The escapement (1) has a first escapement mobile part (2) provided with a first set of escapement teeth (22) and a second escapement mobile part (3) provided with a second set of escapement teeth (32), and an anchor (4) carrying first and second stop pallet stones (42, 43). Coupling wheels (29, 39) mechanically couple the first escapement mobile part to the second escapement mobile part. A roller (5) comprises a first impulse pallet stone (52) co-operating with the first set of escapement teeth, and a second impulse pallet stone (53) co-operating with the second set of escapement teeth. An independent claim is also included for a timepiece comprising first and second barrels.