Horology: time measuring systems or devices – Oscillating or reciprocating means – Balance wheel type
Reexamination Certificate
2011-05-31
2011-05-31
Kayes, Sean (Department: 2833)
Horology: time measuring systems or devices
Oscillating or reciprocating means
Balance wheel type
C216S002000
Reexamination Certificate
active
07950847
ABSTRACT:
The invention relates to a Breguet overcoil balance spring (1) that includes a hairspring (3) mounted in a single part, made of micro-machinable material, and coaxially with a collet (5). According to the invention, the balance spring has a terminal curve (7) made of micro-machinable material and an elevation device (9) made of micro-machinable material between the outer coil (15) of the hairspring and the terminal curve to improve the concentric development of the balance spring. The invention also relates to the method of manufacturing the balance spring. The invention concerns the field of timepiece making.
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Search Report issued in corresponding application No. EP 08168453, completed May 8, 2009.
Bifrare Christophe
Zaugg Alain
Griffin & Szipl, P.C.
Kayes Sean
Montres Breguet S.A.
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