摘要:
In an annual or perpetual calendar mechanism, a lever bears a maneuvering device of a day-of-the-month wheel. A month wheel defines course beginning stops, each associated with a month and operational for controlling a course beginning position of the lever when the month wheel is in the angular position associated with this month. These course beginning stops are bottoms of slots alternating with the teeth of the month wheel. The month wheel has a peripheral edge which forms the profile of its teeth as well as the course beginning stops.
摘要:
In an annual or perpetual calendar mechanism, a day-of-the-month wheel includes a notch. At each actuation of a lever, a first pawl finger effects an actuation of one step, on one of the teeth of the day-of-the-month wheel. Upon actuation of the lever at the end of a month of fewer than 31 days, a second pawl finger effects, in the notch, an actuation of the day-of-the-month wheel by a whole number of steps. The notch is positioned between two consecutive teeth among the teeth of the day-of-the-month wheel. The day-of-the-month wheel has a peripheral edge which forms the profiles of its teeth as well as the notch.
摘要:
A chronograph mechanism includes an intermediate chronograph mobile which is provided for transmitting a drive to first and second sweep-hand mobiles. A first and a second return device are configured to return the first sweep-hand mobile to a first predetermined angular position relative to the intermediate chronograph mobile, in the absence of angular immobilization of the first sweep-hand mobile by a first brake, and the second sweep-hand mobile to a second predetermined angular position relative to the intermediate chronograph mobile, in the absence of angular immobilization of the second sweep-hand mobile by a second brake. A control system includes a coordination device arranged to maintain the first and second brakes alternately in two opposite configurations, in each of which one of the first and second brakes is in an inactive state and the other is in an active state.
摘要:
A coupling device for timepieces that includes an entry wheel, a coupling wheel, and a first exit wheel. The coupling wheel is disposed substantially coplanar to the plane of rotation of the entry wheel and of the first exit wheel and is adapted to tilt relative to the plane of rotation to occupy a first coupling position in which the coupling wheel meshes with the first exit wheel and a second coupling position in which the coupling wheel is decoupled from the first exit wheel. The device also includes a movable element to control the change of position between the first and the second position of the coupling wheel. The coupling wheel defines an axis of rotation that can be inclined relative to the normal to the plane of rotation of the entry wheel and of the exit wheel by being mounted pivotably at each of the ends thereof.