Eta Sa Manufacture Horlogere Suisse

Montres Breguet S.a.

Stefan Rombach

Alain Zaugg

Dominique Lechot

Jean-Philippe Rochat

Raphael Courvoisier

Raphaël Courvoisier

Julien Chaignat

Benoît Gilligmann

Dominique LÉCHOT

A power reserve indicator mechanism is for displaying the power reserve of an energy storage of a timepiece movement, powered in a winding phase by an input wheel actuated by a winding-stem or an automatic winding mechanism of the movement, or by an external winder, and arranged to restore energy in the unwinding phase via an output wheel. The power reserve indicator mechanism includes at least one display wheel set indirectly driven by the input wheel or by the output wheel, via a differential mechanism of which the input wheel and the output wheel constitute two inputs, and, at a single output, an output wheel set directly or indirectly driving the display wheel set.

Power reserve indicator mechanism for horology

A chronograph mechanism includes an energy accumulator, a regulating system, and a gear train connecting the energy accumulator to the regulating system. The energy accumulator is formed by a strip-spring and includes a device for driving the gear train arranged to regulate the torque delivered by the strip-spring.

Chronograph mechanism

Grand date calendar display device for a watch movement comprising a first disc and a second disc, arranged to display, at least on certain dates, first date values through a combination of symbols borne by the first disc and symbols borne by the second disc, wherein the device includes a first coupling mechanism and a second coupling mechanism between the first disc and the second disc such that, at least on certain dates, the first disc drives the second disc, and on certain other dates, the second disc drives the first disc.

Coupling mechanism for date display discs

Grand date calendar display device for a watch movement comprising a first disc and a second disc, arranged to display, on certain dates, first date values by combining symbols borne by said first disc and symbols borne by said second disc, and on other dates, second date values by symbols borne only by said second disc. The first disc is a modified units display disc, bearing a first series of symbols comprising a first sequence of at most nine first consecutive units numerals truncated by at least a second units numeral with respect to the complete series of ten units, and the second disc is a modified tens display disc including a second series of symbols for the display of at least the tens of the date, comprising at least one combination of two numerals formed of a tens numeral and a second units numeral.

Calendar display device for a timepiece

A chronograph mechanism including an energy accumulator, a regulating system, a chronograph counter train including a minute-counter having a minute wheel set and at least one minute indicator member, and a seconds-counter having a seconds wheel set and a seconds indicator member, a chronograph zero-reset mechanism including a minute zero-reset mechanism. The minute zero-reset mechanism is arranged to cooperate with the minute wheel set, the minute indicator member being permanently integral with the minute wheel set, and the chronograph counter train includes an uncoupling device between the minute-counter and the seconds-counter, arranged to kinematically connect the minute wheel set and the seconds wheel set during the counting and to uncouple the seconds wheel set from the minute wheel set when the chronograph mechanism is reset to zero.

Device for displaying a date indication in an aperture of a watch dial including:

Date display device for a timepiece

Device for securing and locking a display element () mounted on a support () using at least one assembly element () in a direction of assembly (D). The device includes at least one locking element () for the assembly element () and the locking element () is accessible from the visible side () of the display element ().

Method and device for securing a display element

The annual calendar device carries a date ring () and a drive wheel () for said ring. The drive wheel () carries a mechanism () including a first finger () driving the ring () through one step each day and a second finger () which is inserted, at the end of the months of less than thirty-one days, into the trajectory of the teeth () of the ring () to move said ring forward one additional step. The second finger () is inserted into said trajectory by a kinematic chain () controlled by a toothing () carried by the ring ().

Growing community of inventors

Bienne, Switzerland

Stefan Rombach