SELF-COMPENSATION TYPE SPIRAL FOR MECHANICAL SPIRAL BALANCE-WHEEL OSCILLATOR AND ITS TREATMENT METHOD
PROBLEM TO BE SOLVED: To provide a self-compensation type spiral made of a paramagnetic alloy containing at lest one kind of element among Nb, V, Ta, Ti, Zr and Hf for a mechanical spiral balance-wheel oscillator in a clock wheel train or another precision instrument, and provide a treatment method...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To provide a self-compensation type spiral made of a paramagnetic alloy containing at lest one kind of element among Nb, V, Ta, Ti, Zr and Hf for a mechanical spiral balance-wheel oscillator in a clock wheel train or another precision instrument, and provide a treatment method for the spiral. SOLUTION: This self-compensation type spiral made of a paramagnetic alloy for a mechanical spiral balance-wheel oscillator in a clock wheel train or another precision instrument contains at least one kind of element among Nb, V, Ta, Ti, Zr and Hf, and is coated with a substantially homogenous oxide layer of a thickness of 20 nm or above formed by applying anodization treatment to the spiral. |
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