Abstract: Timepiece displaying the current time and including at least first and second display devices for a time-related quantity, the first and second display devices each being driven by a drive mechanism including a drive wheel (2; 2a), which is itself driven by the movement of the timepiece (3), at least the drive wheel (2; 2a) of one of the drive mechanisms carrying a finger (4; 4a) via which the wheel drives the corresponding display device, the timepiece (3) being characterized in that the finger (4; 4a) is friction fitted onto the drive wheel (2; 2a).

Abstract: Timepiece displaying the current time and including at least first and second display devices for a time-related quantity, the first and second display devices each being driven by a drive mechanism including a drive wheel (2; 2a), which is itself driven by the movement of the timepiece (3), at least the drive wheel (2; 2a) of one of the drive mechanisms carrying a finger (4; 4a) via which the wheel drives the corresponding display device, the timepiece (3) being characterized in that the finger (4; 4a) is friction fitted onto the drive wheel (2; 2a).

Abstract: The invention concerns an AM/PM display disc (1), rotating in one day about an axis of rotation (2), including two different juxtaposed surfaces (3, 4). It is characterized in that the surfaces are delimited, between a hub (5) and the periphery (6) of said disc (1) by two boundary curves (7, 8), each tangential to said periphery (6) and having a single concavity from said periphery (6) towards said hub (5), the concavities of said curves (7, 8) having the same direction relative to the direction of rotation (A) of said disc (1), and any radial line originating from said axis (2) intersecting, in succession, one of said two surfaces, then the other, and only passing through one of said curves between said hub (5) and said periphery (6).

Abstract: The column-wheel (1) for a chronograph includes: a ratchet (2) provided with a plurality of teeth (3) the shape of which defines the direction of rotation of the column-wheel; a superstructure coaxial to the wheel and having n>=3 order rotational symmetry, the peripheral part of the superstructure forming n columns (10) parallel to the wheel axis and arranged substantially along the periphery of the ratchet (2), each column including an outer part, the cross-section of which is substantially shaped like a truncated triangle with a base substantially parallel to the circumference of the wheel and a front side (12), called the leading edge, and a back side (13), called the trailing edge, extending from the base towards the interior of the wheel. The column-wheel is characterized in that said cross-section is asymmetrical, a first angle ? between the leading edge (12) and the base (14) being smaller than a second angle ? between the base and the trailing edge (13).

Abstract: The invention concerns an AM/PM display disc (1), rotating in one day about an axis of rotation (2), including two different juxtaposed surfaces (3, 4). It is characterized in that the surfaces are delimited, between a hub (5) and the periphery (6) of said disc (1) by two boundary curves (7, 8), each tangential to said periphery (6) and having a single concavity from said periphery (6) towards said hub (5), the concavities of said curves (7, 8) having the same direction relative to the direction of rotation (A) of said disc (1), and any radial line originating from said axis (2) intersecting, in succession, one of said two surfaces, then the other, and only passing through one of said curves between said hub (5) and said periphery (6).

Abstract: During normal use, the time indicator (2) is driven by a mechanism (3) controlled by the gear train (4) of the timepiece. This mechanism is arranged for uncoupling the gear train from the indicator when the time-setting member (1) is actuated, this action causing the indicator to move forward through a step of one hour. The time-setting member includes a push-button (5) which actuates a device (6) that in turn acts on said mechanism (3).

Abstract: Timepiece displaying the current time and including at least first and second display devices for a time-related quantity, the first and second display devices each being driven by a drive mechanism including a drive wheel (2; 2a), which is itself driven by the movement of the timepiece (3), at least the drive wheel (2; 2a) of one of the drive mechanisms carrying a finger (4; 4a) via which the wheel drives the corresponding display device, the timepiece (3) being characterized in that the finger (4; 4a) is friction fitted onto the drive wheel (2; 2a).

Abstract: Watch comprising a mechanism (50) for driving a device (1) that displays a time-dependent value, this drive mechanism (50) itself being driven by the movement of the watch, this watch also having at least one first correction element (42) acting on the display device (50) via a clockwork mechanism (2) of the drive mechanism (50), and at least one second correction element (48) acting directly on the device (1) that displays the time-dependent value, the watch being characterised in that the drive mechanism (50) is arranged so as to drive the device (1) that displays a time-dependent value in both directions when the first correction element (42) is operated, and so as to be overridden when the second correction element (48) is operated, acting directly on the device (1) that displays a time-dependent value.

Abstract: Watch comprising a mechanism (50) for driving a device (1) that displays a time-dependent value, this drive mechanism (50) itself being driven by the movement of the watch, this watch also having at least one first correction element (42) acting on the display device (50) via a clockwork mechanism (2) of the drive mechanism (50), and at least one second correction element (48) acting directly on the device (1) that displays the time-dependent value, the watch being characterised in that the drive mechanism (50) is arranged so as to drive the device (1) that displays a time-dependent value in both directions when the first correction element (42) is operated, and so as to be overridden when the second correction element (48) is operated, acting directly on the device (1) that displays a time-dependent value.

Abstract: During normal use, the time indicator (2) is driven by a mechanism (3) controlled by the gear train (4) of the timepiece. This mechanism is arranged for uncoupling the gear train from the indicator when the time-setting member (1) is actuated, this action causing the indicator to move forward through a step of one hour. The time-setting member includes a push-button (5) which actuates a device (6) that in turn acts on said mechanism (3).

Abstract: A timepiece such as a watch carries a date ring with a window display. The ring carries an engaging system capable of driving at the end of each month an annual ring having twelve or twenty four external teeth and five internal teeth. A calendar driving wheel set has a first finger capable of driving the date ring and a second finger capable of driving the annual ring. At the end of a month of thirty days, one of the five internal teeth of the annual ring appears on the path of the second finger and drives this ring in its travel, such ring, from being driven becomes a driving wheel and, via the engaging system, causes the date ring to advance to the first of the following month. A manual correction remains necessary at the end of the month of February.

Abstract: The annual calendar mechanism includes a calendar driving wheel (18) provided with a finger (17) adapted to drive a date wheel (19) through one step at the end of each month. An annual wheel (25), driven through two steps once per month by a long tooth (23) borne by an intermediate wheel (21), itself meshing with the date wheel (19), includes a plate (27) bearing five teeth (28). If one of these five teeth, corresponding to one of the months of less than thirty-one days, comes into the path of finger (17), the annual wheel, from being driven, becomes driving and drives the date wheel through an additional step via the intermediate wheel.

Abstract: The invention concerns a timepiece including a horometric movement (M) with a dial train (8, 46), at least one hours hand (4) which is mounted on an hours pipe (4a) driven by the dial train, a rotary ring (48) driven by the hours pipe so as to effect one revolution per twenty-four hours, a first display means (3) including a twenty-four-hour hours circle and a second display means including geographic indications respectively indicating various time zones, one of the display means (3) being arranged on the rotary ring (48) in order to be displaced facing the other (5) and in order to furnish with the latter a universal time display, characterized in that it includes a correction mechanism (MC) adapted to act on the hours hand (4) independently from the driving of the rotary ring (48).

Abstract: This invention concerns a compass watch as well as a bezel specifically intended to fit out such a watch. The invention comprises at least one time indicating element (4) kinematically driven in rotation by a mechanical or electromechanical horometric movement, and particularly intended to be pointed towards the sun, and direction indicating means (N, S, W, E) arranged on said watch enabling one to know, as a function of the orientation of said indicating means (4), the direction of at least one of the cardinal points, and is characterized in that it includes correction means (52; 16, M) for the positioning of the cardinal points, adapted to take into account the equation of time and to correct any variation between true solar time and the legal or local time of day. The invention is applied to a watch, preferably of the mechanically or electromechanically driven type.

Abstract: A timepiece including automatic backward moving display means. Such invention includes: a horometric movement, an intermediate wheel (22) driven by the movement and including driving gear teeth (26a-26y), a display system (16) for information such as the date, at least one oscillating element (30) coupled to the display system (16) and including driven gear teeth (32) in mesh with the driving gear teeth (26a-26y) of the intermediate wheel (22), return means (34) for the oscillating element (30), declutching means (40, 40a) to enable the oscillating element (30) to effect a free backward motion, and an abutment (B) associated with a counter-abutment (CB) in order to limit the backward movement of the oscillating element (30), this invention being characterized in that the counter-abutment (CB) is formed by one (26a) of the driving gear teeth (26a-26y) of the intermediate wheel (22) which, during driving, normally meshes with the driven teeth (32) of the oscillating element (30).

Abstract: The invention concerns an astronomic timepiece enabling a simple display of the daily value of an astronomic magnitude having an annual cycle. The timepiece comprises a month disc (13), at least a portion of which is visible through an opening (19) provided in the dial (6). The development of the astronomic magnitude is represented in the form of a curve (25) in a frame of reference one coordinate of which indicates the date and the other indicates a value of the astronomic magnitude.

Abstract: The system comprises a mobile device mounted (2) on each moving body, a fixed receiving antenna (3) and means for processing (4) the identification signals emitted by the mobile devices (2). The frequency of these identification signals is representative of the respective moving bodies. In addition, a transmitter (22) is provided to send the devices (2) a control signal that serves, on the one hand, to allow power supply to be applied to means for generating the identification signals and, on the other, serves as reference signal for those means, which do not have their own time base. This system is particularly well suited to the timing of automobile races.