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:
Jun. 13, 2023
Filed:
May. 21, 2019
Eta SA Manufacture Horlogere Suisse, Grenchen, CH;
ETA SA Manufacture Horlogere Suisse, Grenchen, CH;
Abstract
Timepiece regulator comprising a detached lever escapement mechanism, and a resonator with a quality factor Q including an inertia element including an impulse pin cooperating with a fork of the lever, subjected to the return force of two flexible strips attached to the plate, defining a virtual pivot having a main axis (DP), the lever pivoting about a secondary axis (DS), and the lift angle (β) of the resonator, during which the impulse pin is in contact with the fork, is less than 10°, and the ratio I/Ibetween the inertia Iof the inertia element with respect to the main axis (DP) and the inertia Iof the lever with respect to the secondary axis (DS) is greater than 2Q·α/(0.1·π·β), where α is the lift angle of the lever corresponding to the maximum angular travel of the fork.