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:
Dec. 24, 2013
Filed:
Jul. 11, 2012
Julien Moulin, Volleges, CH;
Ivan Villar, Bienne, CH;
Laurent Kaelin, Sonvilier, CH;
Baptist Wyssbrod, Nidau, CH;
Julien Moulin, Volleges, CH;
Ivan Villar, Bienne, CH;
Laurent Kaelin, Sonvilier, CH;
Baptist Wyssbrod, Nidau, CH;
ETA SA Manufacture Horlogere Suisse, Grenchen, CH;
Abstract
Timepiece movement including a module fitted with a first wheel set meshing with a second wheel set, which pivots on a base on which the module is mounted. The movement includes a means of positioning the module formed by a cam, at least most of the periphery of which forms an Archimedes' spiral. The cam is arranged so as to allow the distance of centers between the first and second wheel sets to be adjusted, when the cam is rotated on itself about the center of the Archimedes' spiral. The cam is preferably calibrated. The invention also concerns a method of adjusting the distance of centers between the two wheel sets using said cam to optimise the gearing efficiency of the two wheel sets.