A timepiece includes a timepiece movement, a calendar mechanism and a mechanism for indicating the sunrise and sunset that take account of seasonal variations. The calendar mechanism includes a date display and a month display. The sunrise and sunset indicating mechanism 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 by the date wheel set via a third kinematic chain.

A clock according to an exemplary embodiment of the present invention includes: an hour hand part which includes a first hour hand for indicating time of a first country to be shown, and a second hour hand for indicating time of a second country to be shown; an hour hand plate which indicates times including a reference line for defining 12 am; a city name plate on which an international date line and city names are marked and which is rotated together with the first hour hand; and a date display part which displays two continuous dates based on the international date line, in which in the date display part, the date is changed as the international date line provided on the city name plate, which is rotated relative to the hour hand plate, passes over the reference line provided on the hour hand plate. The clock according to the present invention is configured as an analog-type dual clock required according to increase in overseas activity of people such as overseas travelers and people active in overseas business to present a new type for satisfying various tastes and consumption desires and also enable a user to easily recognize time and dates by showing different dates corresponding to local times of two countries.

A watch includes a timepiece movement including a mechanism for displaying a time period or season which includes a first wheel which is provided in order to turn once in thirty-one days for displaying a day of the month, and a second wheel for displaying another time period or season. The second wheel turns more quickly than the first wheel for displaying this time period or season, and the second wheel is provided in order to be displaced from the first wheel, at the rate of one turn in a period of time between 340 days and 380 days.

This relates to a calendar display mechanism for a clockwork movement, including a day-of-the-month wheel intended to actuate a month wheel at the end of each month, the month wheel including a year cam that has n series of graduations, each of which is associated with a particular year, each series of graduations having a number m of graduations corresponding to the number of months in the associated year, the display mechanism including a rotatable month lever which supports a month feeler-spindle thereon which remains in contact with the year cam so as to define the angular orientation of the month lever, the lever also having a kinematic connection to a month display wheel so as to cause the wheel to perform a retrograde movement.

The invention concerns a running equation of time mechanism including a hand arrangement whose purpose is to indicate civil time by means of an hour hand and a minute hand, and a true minute hand concentric with the civil minute hand, and which indicates the true solar minute, wherein the running equation of time mechanism also includes an equation of time cam having a profile which is determined by the difference, on each day of the year, between civil time, and true time, wherein this equation of time cam is driven in rotation by a calendar mechanism, wherein the position of the true minute hand is determined by the position of the equation of time cam, wherein the running equation of time mechanism also includes 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, wherein 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 display system is provided, configured to be integrated in an accessory to be worn by a wearer/user as an article of clothing, an item of jewelry, a wristwatch, a pocket watch or any other fashion item. The display system includes: (a) a source of electrical energy, (b) one or more light sources, (e) a source of mechanical information, visual animation or visual presentation, (d) a transformation device for transforming such information or visual animation into a luminous information or visual animation, and (e) a control device adapted to allow the user/wearer to control the activation of the system. In this manner, the system is able to provide a luminous information, visual animation or visual presentation.

The present invention relates to a display (10) of a timepiece, comprising a first indication (12) of a first time zone corresponding to the local time, a second indication (14) of the time of a second time zone and a day/night indicator (21) arranged to make one revolution in 24 hours. The day/night indicator (21) comprises a first and a second sector (22, 24) having a different visual appearance and representing day and night respectively. The display (10) further comprises a multiple display module (20) comprising at least a first indicator (26) arranged in a fixed manner in correspondence with the day/night indicator (21) and a second indicator (28) serving as a reference and arranged in correspondence with the day/night indicator (21) in order to indicate at a given instant whether it is day or night at the local time and at the time of the second time zone. The invention also relates to a timepiece comprising the display (10)

The invention relates to a device for the display of periods which, in succession, form an annual cycle, for a timepiece movement, comprising an indicator member for indicating said periods. It comprises at least a mechanism for controlling the duration of display of said periods including at least: a drive member for driving the indicator member arranged to drive the indicator member at the moment of a change in period, a cam controlling the duration of display of said periods, and means for driving the cam, a first differential gear with two inputs and one output, a first input being formed by a reference drive wheel, arranged to complete one revolution in one reference period, a second input being formed by an actuation member arranged to cooperate with said cam, and the output being formed by said drive member for the indicator member,
said cam comprising a profile arranged such that the actuation member cooperates with the first differential gear to move the drive member for the indicator member forwards or backwards, depending on the duration of the period displayed relative to the reference period.

A timepiece indicates the sunrise and sunset taking into account seasonal variations. The timepiece includes a sphere representing the Earth, a shell arranged concentrically to the sphere and arranged to delimit a part of the globe where it is night time from another part where it is daytime by indicating the position of the Earth's terminator. The shell can pivot around the globe along two perpendicular axes. The shell is driven by the movement in order to revolve at the rate of one revolution every 24 hours around the polar axis. A differential mechanism is controlled by a year cam that has a profile representing the inclination of the sun in relation to the equatorial plane. The differential mechanism controls the inclination of the shell around the axis by a drive shaft concentric to the polar axis.

Method and device for celestial timekeeping that synchronizes independent object-relative cyclic time and displays each unique temporal interval on a single user display system. Multi-celestial cyclic time is displayed based on a user's frame of reference by aligning with recurrent and unique cyclic start/stop signals and the local reference frame timekeeping system. For example, using the Coordinated Universal time (UTC) for a user on Earth to equate the duration of independent cyclic time of Lunar18, Mars24, and so on. The method uses dimensional analysis and equates a single cyclic, non-cyclic (zero-time; start/stop non-dimensional instant of a cycle), and linear continuous time [T] from an observer frame of reference for displaying one or more temporal cycles on the user's device. Each independent cycle is consistent with temporal counts of a whole cycle (equated to SI units) displayed as either a discrete geometric shape (spatiotemporal units) and/or algebraic numbers on the device.