Search International and National Patent Collections

1. (WO2018177779) TIMEPIECE COMPRISING A MECHANICAL MOVEMENT IMPROVED BY A CORRECTION DEVICE

Pub. No.:    WO/2018/177779    International Application No.:    PCT/EP2018/056726
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Sat Mar 17 00:59:59 CET 2018
IPC: G04C 3/04
G04C 13/02
G04B 19/26
G04B 17/26
Applicants: THE SWATCH GROUP RESEARCH AND DEVELOPMENT LTD
Inventors: TOMBEZ, Lionel
Title: TIMEPIECE COMPRISING A MECHANICAL MOVEMENT IMPROVED BY A CORRECTION DEVICE
Abstract:
The invention relates to a timepiece (34) provided with a mechanical movement (4) comprising a mechanism indicating at least one time datum, a mechanical resonator (6) forming a mechanical oscillator that clocks the operation of the indicator mecanism, and a correction device (36) for preventing a potential time interval error in the operation of the indicator mechanism. The correction device is formed by a master oscillator (42) and a mechanical braking device (38, 40) of the mechanical resonator, said mechanical braking device being arranged so as to be able to periodically apply braking pulses to the mechanical resonator at a braking frequency determined by the master oscillator. Then, the system, formed by the mechanical resonator and the mechanical braking device, is designed so as to allow the mechanical braking device to be able to begin the braking pulses preferably at any position of the mechanical resonator. Preferably, the duration of the braking pulses is shorter than a quarter of a nominal period.