Patent ID: 8811125
Filing Date: 2014-08-19
Classification: G04B

Abstract:
1. A program wheel device for a calendar mechanism, wherein the program wheel comprises: a day program wheel that is driven by a clock movement and actuates a wheel train for display of the days of the month, wherein said day program wheel is fitted to perform a complete rotation every month, and a month program gear fitted to perform a complete rotation every year, wherein the day program wheel and the month program gear are mounted coaxially, wherein said day program wheel comprises a homogeneous day indexing tooth system with 31 teeth indexed by pitch by one tooth each day by a drive wheel train actuated by said clock movement, wherein the day indexing tooth system additionally operates a control wheel train to index the month program gear by a twelfth of a rotation each month, and wherein said program wheel comprises a plurality of planet gears, wherein the rotation axes of said planet gears are integral with said day program wheel, and said planet gears mesh with the gears rotationally fixed with the month program gear to conduct indexing readjustments at the end of the month.