Patent ID: 6678218
Filing Date: 2004-01-13
Classification: G04C

Abstract:
Timepiece including a time base, a generator formed in particular of a rotor with permanent magnets and at least one coil, a barrel with a mainspring coupled to said generator in order to drive it, analogue time indicating means also driven by said barrel and operating substantially synchronously relative to said time base as long as a torque CB provided by said barrel is greater than or equal to a minimum synchronisation torque CSYNC, means for braking said generator, magnetised means having with said rotor, when the generator is stopped, a static positioning torque CP allowing said rotor to be kept in a substantially stationary position, wherein the generator braking means are activated as soon as the time indicating means are no longer operating in a substantially synchronised manner with the time base, and wherein the magnetised means are arranged such that the static positioning torque CP is greater than or substantially equal to a reference torque CREF for which the torque CB exerted by the barrel on the rotor is equal to said minimum synchronisation torque CSYNC.