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:
Jul. 03, 2018
Filed:
Mar. 01, 2017
Applicant:
Eta SA Manufacture Horlogere Suisse, Grenchen, CH;
Inventors:
Jean-Luc Helfer, Le Landeron, CH;
Yves-Alain Cosandier, Renens, CH;
Assignee:
ETA SA Manufacture Horlogère Suisse, Grenchen, CH;
Primary Examiner:
Int. Cl.
CPC ...
G04B 17/06 (2006.01); F16F 1/04 (2006.01); G04B 17/34 (2006.01);
U.S. Cl.
CPC ...
G04B 17/063 (2013.01); F16F 1/042 (2013.01); F16F 1/047 (2013.01); G04B 17/066 (2013.01); G04B 17/345 (2013.01);
Abstract
A one-piece balance spring including a single strip wound on itself between an inner coil and an outer coil, the strip having a geometry such that when the angle of contraction of the balance spring has a value of 360 degrees, there is a substantially constant distance between each coil from the inner coil to the penultimate coil.