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:
Aug. 23, 2005
Filed:
Nov. 19, 2004
Roger Willemin, Grenchen, CH;
Roger Metzger, Aarau, CH;
Marco Bettelini, Prêles, CH;
ETA SA Manufacture Horlogère Suisse, Grenchen, CH;
Abstract
Date mechanism for a timepiece such as a wristwatch including two superposed respectively lower () and upper () date rings, whose surface is divided into a plurality of sectors, the upper ring () including sixteen sectors, fifteen of which respectively bear fifteen successive markings of a cycle of 31 positions, and the sixteenth of which is an extra sector having an open or transparent aperture (), whereas the lower ring () includes seventeen sectors, sixteen of which bear respectively the other sixteen markings of the cycle of 31 positions, and the seventeenth of which is an extra sector, each of said rings cooperating with drive means such that the markings appear successively in a display zone () the date mechanism further including a jumper-effect stopping device () able to stop each ring () in any desired position, the date mechanism being characterised in that one location on the upper ring () and one location on the lower ring () is provided with a thinned tooth () and (), located between two successive teeth () or () of the toothing of the ring () or () concerned, the position of the drive means with respect to the toothing of the rings () being such that when a ring () or () has its extra sector at the location of the display zone (), the thinned tooth () or () is located opposite the drive means such that said drive means only drive the other ring, the thinned teeth () not disturbing the movement of the drive means and allowing the stopping device () to be constantly housed between two successive teeth () or () of each of the rings ().