Patent ID: 6987711

Claim:
An analog indicator device for timekeepers, comprising at least one reading assembly formed of a principal reading pair made up of a fixed reference member having a reference graduation comprising equidistant marks, and a moving indicator member provided with at least one reference that moves with respect to the fixed reference member with a basic period Pb defining a given number and duration of subperiods per passage of the reference with regard to the marks of the reference graduation, the two members of the pair each having a subperiod reading graduation, these two graduations being disposed according to the vernier principle, the subperiod reading graduations being disposed so that when the moving member is stopped in any position, the graduations allow a precise reading of a time interval corresponding to a subperiod fraction elapsed since a last coincidence between the position of the reference and a mark of the reference graduation, the arrangement of the subperiod reading graduations on the two members allows a reading of successive coincidences in the clockwise and counterclockwise direction independently of the rotational direction of the moving member.