Time-setting mechanism for clock movement with perpetual julian date

Time setting mechanism of a perpetual date clock movement (1) which includes a drive device (8) tor driving a date indicator (2) comprising driving means (10) that can advance said indicator (2) by a jump once every 24 hours this movement (1) further comprising an adjustment device allowing this indicator (2) to make adjusting steps to take account automatically of months with 28, 29 or 30 days, said device including a rotating cam (26) driven by at least one step every 24 hours, this cam having a profile (28) suitable for driving a sensor (3) causing:

• on the one hand, the oscillating movement of a mobile assembly (32) provided with a pawl system (34) to make the date indicator (2) advance by the additional step or steps required, and
• on the other hand, the advance of this cam (26) in order to have it make a number of steps equal to the number of adjusting steps of this indicator (2), in order to make it carry out one complete turn per year,
• characterized in that it comprises means (156) for disengaging the sensor (30) to disengage it from the profile (28) of that cam (26), and means for coupling the indicator with said cam, said coupling means (164) being driven by said disengagement means (156) which are controlled by a control stem (150).