An electronic watch including an exterior case including an opening, a crystal disposed in the opening, an hour hand and a minute hand that indicate the time of day, a dial including an indicium, a pressure sensor configured to measure a pressure, and a controller configured to determine a water depth based on the output from the pressure sensor, indicate the water depth with the hour hand, and indicate an elapsed time with the minute hand, the elapsed time being time elapsed after the predetermined water depth value is exceeded.

A horological movement (6) including: a plate (7); a mechanical resonator (8) including an oscillating balance (11) rotatably mounted relative to the plate (7), and a spiral spring (22) coupled to the balance (11); an electromagnetic regulator (29) coupled to the mechanical resonator (8) to regulate the frequency of the oscillations of the balance (11), and including at least one permanent magnet (30) fixedly mounted relative to the plate (7), at least one coil (31), a quartz or silicon resonator (32) and an electronic circuit (33) connected to the resonator (32) and to the coil (31), all mounted on the balance (11) while being completely included in an inner cavity (18) delimited by the latter.

A mechanical oscillator, formed of a mechanical resonator and a device for maintaining oscillation, and an auxiliary oscillator forming a reference time base including a synchronisation device arranged to slave the medium frequency of the mechanical oscillator on that of the auxiliary oscillator. The synchronisation device includes an electromagnetic braking device which is formed of a coil and at least one permanent magnet and arranged such that an induced voltage is generated between the terminals of the coil in each alternation of the oscillation of the mechanical resonator. The synchronisation device is arranged to be able to reduce momentarily the impedance between the terminals of the coil during distinct time intervals, any two successive time intervals exhibiting between the respective starts thereof a time distance substantially equal to a positive whole number multiplied by half of a set-point period for the mechanical oscillator.

A timepiece includes a mechanical oscillator, formed of a mechanical resonator, and a device for regulating the frequency of the mechanical oscillator. This regulation device includes an auxiliary oscillator, an electromechanical device for stopping the mechanical resonator, a sensor arranged to detect the passage of the mechanical resonator via the neutral position thereof, and a measuring device arranged to measure a time drift of the mechanical oscillator. The regulation device is arranged to stop, during a given alternation, the natural oscillation movement of the mechanical resonator selectively either momentarily during a first half-alternation occurring before the passage of the mechanical resonator via the neutral position thereof when the time drift measured corresponds to at least a certain gain, or prematurely during a second half-alternation occurring after the passage of the mechanical resonator via the neutral position thereof when the time drift measured corresponds to at least a certain loss.

An electronic watch including an exterior case including an opening, a crystal disposed in the opening, an hour hand and a minute hand that indicate the time of day, a dial including an indicium, a pressure sensor configured to measure a pressure, and a controller configured to determine a water depth based on the output from the pressure sensor, indicate the water depth with the hour hand, and indicate an elapsed time with the minute hand, the elapsed time being time elapsed after the predetermined water depth value is exceeded.

An electronic watch including an exterior case including an opening, a crystal disposed in the opening, an hour hand and a minute hand that indicate the time of day, a dial including an indicium, a pressure sensor configured to measure a pressure, and a controller configured to determine a water depth based on the output from the pressure sensor, indicate the water depth with the hour hand, and indicate an elapsed time with the minute hand, the elapsed time being time elapsed after the predetermined water depth value is exceeded.

A mechanical movement timepiece assembly with a mechanical oscillator is formed by a resonator of the balance-hairspring type, and a device for regulating the oscillation frequency thereof using an auxiliary oscillator equipped with a quartz resonator. The regulating device includes a sensor, suitable for detecting the passage of the resonator via the neutral position thereof, a measuring device suitable for measuring, on the basis of position signals supplied by the sensor, a time drift of the mechanical oscillator relative to the auxiliary oscillator, and a device for applying to the resonator mechanical braking pulses when a certain time drift is observed. For this purpose, the resonator has a braking surface which extends over at least a certain sector having a certain length along the oscillation axis and against which a braking member may press in order to momentarily brake the resonator.

Descriptions of time altering apparatuses for removing a need for leap seconds are provided. Currently leap seconds are applied to Universal Time Coordinated (UTC) in order to align UTC with mean solar time. In one embodiment a time measurement system is connected to a gigantic heavy flywheel positioned at at least one of a north rotational pole or south rotational pole of the Earth. The time measurement system may determine a shift of UTC away from mean solar time and may subsequently speed up or slow down the flywheel to adjust a rotational speed of the Earth in order to move UTC back to mean solar time. In a second embodiment a similar time measurement system may raise or lower heavy weights into mine shafts drilled at or near the equator of the Earth for a similar effect. Planetary speed adjustments may be written to a blockchain.

A timepiece (2) includes an actuator, which applies braking pulses to the balance, which has an electromechanical device (6) and an electric control circuit (8). The device (6) includes a flexible member (16), formed by an elastic blade (20) and a mechanical element (22) defining a braking pad, and an electromagnetic system (10) formed by a coil carried by the flexible member and by a permanent magnet rigidly connected to a support (18) of the electromechanical device. When an electric pulse is provided to the coil, an electromagnetic force of repulsion is engendered between the coil and the permanent magnet so the mechanical element moves to a position of contact with the balance. To stabilise the rest position of the flexible member, a magnetic element (26) is rigidly connected to the coil to exert a magnetic return force complementary to the force of the elastic blade is provided.

Disclosed in the present application is a horologe, a timekeeping system thereof including: a winding mechanism powering the second hand, minute hand and hour hand; a mechanical transmission wheel train engaged with the winding mechanism and driving the second hand, minute hand and hour hand to operate, wherein the mechanical transmission wheel train comprises a tourbillion mechanism driving a second wheel connected with the second hand to rotate; an accuracy control device, wherein the timekeeping motor of the accuracy control device drives the rotation of the rotor and the timekeeping accuracy of the timekeeping motor is controlled by a quartz crystal oscillator; and an electronic transmission wheel train connected to the rotor. The horologe disclosed in the present application can solve the problem that the timekeeping accuracy of the mechanical horologe is poor.