Horology: time measuring systems or devices – Oscillating or reciprocating means – Balance wheel type
Reexamination Certificate
2006-07-18
2006-07-18
Miska, Vit. W. (Department: 2841)
Horology: time measuring systems or devices
Oscillating or reciprocating means
Balance wheel type
C267S166000
Reexamination Certificate
active
07077562
ABSTRACT:
The invention relates mainly to a hairspring intended to equip the balance wheel of a mechanical timepiece. It is in the form of a spiraled rod (10) cut from an {001} single-crystal silicon plate. Its structure and its dimensions are calculated so as to minimize the thermal drift of the hairspring/balance-wheel assembly by means of the first and second thermal coefficients of its spring constant.
REFERENCES:
patent: 3696687 (1972-10-01), Harland
patent: 3735586 (1973-05-01), Berney
patent: 3956881 (1976-05-01), Vuille et al.
patent: 4922756 (1990-05-01), Henrion
patent: 5152851 (1992-10-01), Yamamoto et al.
patent: 6101805 (2000-08-01), Wassenhoven
patent: 6863435 (2005-03-01), Moteki et al.
patent: 101 27 733 (2003-02-01), None
patent: WO 02 04836 (2002-01-01), None
Patent Abstracts of Japan, vol. 018, No. 408 (M-1647), Jul. 29, 1994; & JP 06 117470 A. (Yokogawa Electric Corp), Apr. 26, 1994.
Patent Abstracts of Japan, vol. 010, No. 265 (M-515), Sep. 10, 1986 & JP 61 088033 A (Kyocera Corp), May 6, 1986.
Patent Abstracts of Japan, vol. 016, No. 208 (M-1249) May 18, 1992 & JP -04 034226 (Toshiba Corp), Feb. 5, 1992.
Patent Abstracts of Japan, vol. 016, No. 501, Oct. 16, 1992 & JP 04 185698 A (Seiko Epson Corp), Jul. 2, 1992.
Bourgeois Claude
Hoogerwerf Arnold Christiaan
Perret Andre
CSEM - Centre Suisse d'Electronique et de Microtechnique SA
Miska Vit. W.
Sughrue & Mion, PLLC
LandOfFree
Watch hairspring and method for making same does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Watch hairspring and method for making same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Watch hairspring and method for making same will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3589207