Instrument for measuring intervals of time comprising a ringing mechanism

An instrument for measuring intervals of time including a chronograph mechanism which it is possible at least to start, stop and reset to zero, wherein said instrument further includes a ringing mechanism which emits an acoustic signal at least when the chronograph mechanism is started, the chronograph mechanism including a column wheel associated with a control element which has teeth the number of which is equal to or two times greater than the number of columns of the column wheel and which activates the ringing mechanism at least when the chronograph mechanism is started, the teeth being made in one piece with the columns, the control element acting on the ringing mechanism via a release lever that is capable of pivoting and which has two diametrically opposite radial arms, the control element controlling the pivoting of the release lever by acting on the arm of said lever via one of its teeth, said lever moving, via its arm, a strike hammer away from its rest position against the return force of an activating spring, wherein, gradually as the release lever pivots, the arm thereof slides along the tooth with which it is meshed until the moment when said arm escapes from said tooth, the activating spring then being let down and driving the hammer against a gong.

An instrument for measuring intervals of time including a chronograph mechanism which it is possible at least to start, stop and reset to zero, wherein said instrument further includes a ringing mechanism which emits an acoustic signal at least when the chronograph mechanism is started, the chronograph mechanism including a column wheel associated with a control element which has teeth the number of which is equal to or two times greater than the number of columns of the column wheel and which activates the ringing mechanism at least when the chronograph mechanism is started, the control element including a ring on whose surface the teeth stand and which is fixed to the columns, the control element acting on the ringing mechanism via a release lever that is capable of pivoting and which has two diametrically opposite radial arms, the control element controlling the pivoting of the release lever by acting on the arm of said lever via one of its teeth, said lever moving, via its arm, a strike hammer away from its rest position against the return force of an activating spring, wherein, gradually as the release lever pivots, the arm thereof slides along the tooth with which it is meshed until the moment when said arm escapes from said tooth, the activating spring then being let down and driving the hammer against a gong.