A mechanism for displaying the periods of an annual cycle (100) for a timepiece (200) capable of being driven by being dragged by a running train (10) of a horological movement (1), characterised in that the mechanism for displaying the periods of an annual cycle (100) includes: an indicator indicating the periods of an annual cycle (110); an annual cycle train (120) capable of being driven by said running train (10) of the horological movement (1), and of rotating the indicator of the periods of an annual cycle (110); the mechanism for displaying the periods of an annual cycle (100) being characterised in that the annual cycle train (120) forms a gear train configured to have a ratio of 1:365.2 or a ratio that is a multiple of 1:365.2 between the running train (10) and the indicator of the periods of an annual cycle (110).

A mechanism for displaying the periods of an annual cycle (100) for a timepiece (200) capable of being driven by being dragged by a running train (10) of a horological movement (1), characterised in that the mechanism for displaying the periods of an annual cycle (100) includes: an indicator (110) indicating the periods of an annual cycle; an annual cycle train (120) capable of being driven by said running train (10) of the horological movement (1), and of rotating the indicator of the periods of an annual cycle (110); the mechanism for displaying the periods of an annual cycle (100) being characterised in that the annual cycle train (120) forms a gear train between the running train (10) and the indicator of the periods of an annual cycle (110) including at most four gearings.

A moon phase indicator mechanism, for a timepiece provided with a movement and a dial, the moon phase indicator mechanism including at least one moon disc, and at least one moon phase train driven by the timepiece movement, the moon phase train meshing with a moon phase wheel which carries the moon disc at least indirectly and in a fixed manner, the moon phase wheel taking the form of a toothed ring in order to move the moon disc with the moon phase train about an axis A.

A running equation of time mechanism includes civil hour and minute hands to indicate civil time and a concentric true minute hand to indicate true time. The running equation of time mechanism includes an equation of time cam and a differential gear device, a first input of which is formed by a civil minute pipe on which a civil minute hand is pressed, and a second input of which is formed by the equation of time cam. The differential gear device includes a planetary reducer wheel set via which the civil minute pipe drives a civil hour pipe on which is pressed the civil hour hand, and a planetary multiplier wheel set via which the civil hour pipe drives a true minute pipe on which is pressed the true minute hand.

A running equation of time mechanism includes civil hour and minute hands to indicate civil time and a concentric true minute hand to indicate true time. The running equation of time mechanism includes an equation of time cam and a differential gear device, a first input of which is formed by a civil minute pipe on which a civil minute hand is pressed, and a second input of which is formed by the equation of time cam. The differential gear device includes a planetary reducer wheel set via which the civil minute pipe drives a civil hour pipe on which is pressed the civil hour hand, and a planetary multiplier wheel set via which the civil hour pipe drives a true minute pipe on which is pressed the true minute hand.

The invention relates to a guiding system (1) for a timepiece, with the system comprising a slide (4) that can be moved along a trajectory. The system further comprises: at least one slide-bar (5) positioned along the trajectory, with the slide (4) comprising at least three non-aligned protruding guiding pins (11) designed to lodge in the slide-bar (5) to control the lateral displacement of the slide (4) in a plane along the axes (x, y); an upper support element resting against the slide (4) to block the transverse displacement of the slide (4) along the axis (z).

The invention also relates to a movement or a module for a timepiece comprising said guiding system (1).

The invention relates to a timepiece designed to indicate the position of a celestial body, wherein it comprises: a circuit for determining a current time, a circuit for determining a geographical position of the timepiece, a means designed to determine the position of the celestial body as a function of the current time and of the geographical position of the timepiece, a display system comprising a first hand, a second hand and a means designed to drive the rotation of the said hands in a main plane of the timepiece and to display the determined position of the celestial body.

A planetary clock, including a main body to display at least one of a time of day and an expected weather pattern during a course of the day based on a selected planet, a primary planet selector movably disposed on at least a portion of the main body to select a first planet in response to being depressed, and an alternate planet selector movably disposed on at least a portion of the main body to select at least one second planet in response to being depressed.

The present invention proposes a timepiece mechanism comprising: a lever, rotatable about a lever axis, the angular position of the lever representing a first value, wherein a zero value of the first value corresponds to a reference direction, a sliding block mounted to move in translation on the lever in a direction substantially perpendicular to the axis of the lever and comprising a guide-mark element whose trajectory in translation relative to the lever is secant to the lever axis, the radial position of the guide-mark element with respect to the lever axis representing a second value, an output device formed of a deformable parallelogram in a plane perpendicular to the lever axis, the parallelogram including a first side, which is stationary with reference to the lever axis and perpendicular to the reference direction, a second side, which is opposite to the first side and linked in translation to the guide-mark element in the direction perpendicular to the reference direction,
the angular position of the third and fourth sides of the parallelogram, which are adjacent to the first side, being substantially proportional to the product of the first and second values.

A timepiece movement, a calendar mechanism and device for indicating the sunrise and sunset that takes account of seasonal variations. The simple calendar mechanism includes a display mechanism for displaying the date and a display mechanism for displaying the month. The sunrise and sunset indicating device also includes an annual cam having a profile representative of the tilt of the sun with respect to the equatorial plane and arranged to be driven in rotation via the hour wheel set through a kinematic chain that passes through the month display device and has a transmission ratio of 1:744.