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US 7,350,967 B2Granted
Speed control mechanism and mechanical timepiece having the same
AssigneeSeiko Instruments Inc.
InventorKoichiro Jujo
Life of this patent
Estimating the term…
Abstract
A speed control mechanism has a balance with hairspring mounted to undergo oscillation movement and a regulator structure for adjusting a position of the balance with hairspring. The regulator structure is formed of a nonmagnetic material to prevent reduction of an oscillation angle of the balance with hairspring during oscillation movement thereof.
Claims18
A speed control mechanism comprising:
- a frequency setting mechanism having a stud attaching structure;
- and
- a frequency adjusting mechanism having a regulator structure formed of a nonmagnetic material.
A speed control mechanism comprising:
- a frequency setting mechanism having a stud attaching structure;
- and
- a frequency adjusting mechanism having a regulator structure and a regulator fine adjustment structure both formed of a nonmagnetic material.
A speed control mechanism comprising:
- a balance with hairspring mounted to undergo oscillation movement;
- and
- a regulator structure for adjusting a position of the balance with hairspring, the regulator structure being formed of a nonmagnetic material to prevent reduction of an oscillation angle of the balance with hairspring during oscillation movement thereof.
Dependencies are inferred from the claim text.