Paired balance wheel - hairspring resonator
The resonator (1) has a balance spring (5) formed in a single crystal quartz with three crystallographic axes, where the first and second axes are electrical axis and mechanical axis, respectively. The thermal expansion coefficient of a balance (3) lies between + 6 part per million degree Celsius -1...
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| Format: | Patent |
| Sprache: | eng ; fre ; ger |
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| Zusammenfassung: | The resonator (1) has a balance spring (5) formed in a single crystal quartz with three crystallographic axes, where the first and second axes are electrical axis and mechanical axis, respectively. The thermal expansion coefficient of a balance (3) lies between + 6 part per million degree Celsius -1 and + 9.9 part per million degree Celsius -1. Cut angle ranging between - 5 degree and + 5 degree is formed between the balance spring and the third axis of the single crystal quartz such that the resonator is less sensitive to temperature variation. A portion of the balance is made of titanium, platinum or durimphy. |
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