Patent ID: 7532545
Filing Date: 2009-05-12
Classification: G04B

Abstract:
1. A timepiece provided with a date display comprising a date disk having 31 teeth engaging with a positioning jumper and with a wheel assembly in kinematic connection with a motion-work wheel assembly of the timepiece to drive this disk one step every twenty-four hours, said timepiece being characterized in that the dial of the timepiece carries the digits of the units of dates distributed around a circular sector with spacing corresponding to one step of the date disk and is interrupted by an arcuate window extending all the way around the angular length of said circular sector and through which there appears a pointer member joined to the date disk and carrying, in the direction of rotation of the latter, a units pointer, the digits 1 and 2 for the tens and twenties and a window for showing twice in succession a digit 3 for the thirties, a movable mask ( 10 ) with a return spring being provided between the timepiece dial and the pointer member which is provided with an element for driving the movable mask against the action of its return spring in order to position it in front of said pointer when the latter is over the 0 digit of the units.