| 摘要 |
PROBLEM TO BE SOLVED: To provide a spring balance resonator having a significantly reduced variation of rate due to temperature variations, which is thermoregulated to minimize a daily difference in thermal change of a mechanical clock movement to an equivalent level of daily difference of an electronic quartz clock. SOLUTION: The hair-spring is manufactured by photolithography and etching in a strip 3 pre-cut from a quartz monocrystal such that the height h of the spring forms, relative to the crystallographic axis z, an angle theta for adapting the thermal behavior of the hair-spring to that of the balance, thereby reducing the variation of rate due to temperature variations. COPYRIGHT: (C)2005,JPO&NCIPI
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