Mechanism for advancing a karussel cage by periodic jumps

A mechanism for advancing, by periodic jumps, a cage pivoting about a cage axis, said cage carrying an escape wheel and an escape pinion in addition to a pallet lever cooperating with said escape wheel and with a sprung balance, said mechanism comprising:

• a motion transmitting gear train driven by an input drive means to pivot said cage and said escape pinion;
• a pivoting retaining means arranged to cooperate with said cage to authorize or to prevent the pivoting of said cage, depending on whether said retaining means is pivoting or stopped;
• a pivoting stopping means arranged to cooperate with said retaining means to allow or prevent the pivoting of said retaining means, according to an angular pivoting position of said stopping means, said retaining means having a trajectory that interferes with that of said stopping means, wherein said retaining means and said stopping means are external to said cage, and further wherein said retaining means includes a flirt pinion carrying a flirt which is arranged to cooperate with said stopping means and whose trajectory interferes with said stopping means, said flirt pinion directly cooperating with an inverter wheel of an inverter set, said inverter set including an inverter pinion which is integral with said inverter wheel, and said inverter pinion directly cooperating with a peripheral toothing provided on said cage.