Balance-spring with altered outer curve
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United States of America Patent
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-
Nov 13, 2007
Grant Date -
Jan 5, 2006
app pub date -
Jun 30, 2005
filing date -
Jul 2, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The balance-spring (1) includes a plurality of coils (3) of which the end (6, 8) of the outer curve (2) is rigidified by deformation in order to define accurately the setting point (7) of said balance-spring, said deformation being able to be achieved by bending the end (6) of the outer curve (2) through 90.degree. in a plane perpendicular to the height of the balance-spring (1) or by folding down through 180.degree. a portion of the end (8) of the outer curve (2) against the inner or outer face of said end (2).
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