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:
Nov. 27, 2007
Filed:
Oct. 31, 2005
Christian Ruefenacht, Bienne, CH;
Christian Ruefenacht, Bienne, CH;
ETA SA Manufacture Horlogere Suisse, Grenchen, CH;
Abstract
The annual calendar mechanism comprises a drive wheel set () fitted with a first finger () driving a date disc () through one step once a day and a second finger () driving a plate () secured to an annual wheel () arranged coaxially to the date ring at the end of the months of less than thirty one days. An intermediate wheel () connects the annual wheel () to the date ring () at the end of each month. The annual wheel () comprises twice as many teeth () as there are months in a year and the intermediate wheel () comprises a first wheel () meshed with the annual wheel () and a second wheel () fixed to the first wheel, said second wheel being meshed, at the end of each month, with a snug () arranged inside the date ring ().