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US 7,648,265 B2Granted
Regulatorless oscillating system for a watch
AssigneeLange Uhren GmbH
InventorsLutz Grossman, Jörg Gassmann
Life of this patent
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Abstract
A regulatorless oscillating system for a watch includes a spiral balance spring having an inner fastening point attached to a collet which can be connected to a balance staff, an outer fastening point connected to a balance spring stud, and an end region adjacent to the stud. The end region is held so that it can be adjustably positioned in a plane which is perpendicular to the balance staff, thereby decentralizing the balance spring in order to compensate for isochronism errors.
Claims20
A regulatorless oscillating system for a watch, the system comprising a balance spring, the balance spring comprising:
- an inner fastening point attached to a collet which can be connected to a balance staff;
- an outer fastening point connected to a retaining element;
- and
- an end region adjacent to the retaining element,
- wherein the end region is held so that said end region can be adjustably moved in a plane which is perpendicular to the balance staff without changing an effective length of the balance spring.
2 more elements
Dependencies are inferred from the claim text.