Swatch Group has patented a method for measuring the torque of a balance spring in a timepiece oscillator. The method involves using a main tool with a mock arbor and a holding tool to grip the outer ...
1. Constant Force Spring 2. Constant Torque Spring 3. Constant Force Spring for Carbon Brush 4. Power Spring and Prestressed Power Spring 5. Variable Force Spring 6. Spring-Strip Tube 7. Assembly and ...
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