The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 17, 2009
Filed:
Sep. 20, 2004
Applicants:
Thierry Hessler, Renens, CH;
Rudolf Dinger, Saint-Aubin, CH;
Inventors:
Thierry Hessler, Renens, CH;
Rudolf Dinger, Saint-Aubin, CH;
Assignee:
Asulab S.A., Marin, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G04B 17/00 (2006.01); G04B 17/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
The balance-spring is structured by photolithography and etching in a strip pre-cut from a quartz monocrystal such that the height h of the coils form, with the crystallographic axis z, an angle θ for adapting the thermal behaviour of the balance-spring to that of the balance, thereby reducing the variation of rate due to temperature variations.