公开(公告)号：US20210294270A1

公开(公告)日：2021-09-23

申请号：US17175166

申请日：2021-02-12

Applicant: The Swatch Group Research and Development Ltd

Inventor： Gianni DI DOMENICO ,  Dominique LECHOT ,  Marc STRANCZL ,  Benoit LEGERET

IPC: G04B17/06 ,  G04B17/32

Abstract: A horological movement includes an escapement with a magnetic system to generate magnetic force impulses, so as to sustain the oscillation of the mechanical resonator associated with the escapement. In order to make possible an effective self-starting of the assembly formed of the mechanical resonator and of the escapement during a winding of the barrel, after a stop of the horological movement due to the unwound barrel spring, the escape wheel includes teeth and the pallet assembly includes two mechanical pallet-stones arranged to receive, upon starting, at least one mechanical force impulse of the escape wheel via one of the teeth thereof, the mechanical force impulse generating a starting force torque on the pallet assembly that is transmitted to the balance of the mechanical resonator to begin an oscillation of the latter so that the assembly can operate normally after a starting phase.

公开(公告)号：US20210018876A1

公开(公告)日：2021-01-21

申请号：US16891168

申请日：2020-06-03

Applicant: The Swatch Group Research and Development Ltd

Inventor： Gianni DI DOMENICO ,  Marc STRANCZL ,  Benoit LEGERET ,  René PIGUET

IPC: G04C5/00 ,  G04B15/14

Abstract: A timepiece movement includes a magnetic escapement formed of a magnetic escape wheel with an annular magnetized structure and a pallet fork whose shaft is formed by a ferromagnetic material. The pallet shaft exerts on the escape wheel a magnetic disturbance torque due to the fact that the annular magnetized structure exhibits an angular variation of at least one defining physical parameter thereof, such that the magnetic attraction varies as a function of the angular position of the escape wheel and has a tangential component. A magnetic compensation pin is incorporated in the timepiece movement, this magnetic compensation pin being arranged such that the second magnetic disturbance torque that it exerts on the escape wheel exhibits an angular phase shift relative to the first magnetic disturbance torque generated by the pallet shaft, so as to compensate largely for this first magnetic disturbance torque.

公开(公告)号：US20170242403A1

公开(公告)日：2017-08-24

申请号：US15410244

申请日：2017-01-19

Applicant: The Swatch Group Research and Development Ltd

Inventor： Gianni DI DOMENICO ,  Dominique LECHOT ,  Jerome FAVRE ,  Benoit LEGERET ,  Davide SARCHI

IPC: G04C5/00

CPC classification number: G04C5/005 ,  G04B15/08 ,  G04B15/14 ,  G04C3/047

Abstract: Watch with a timepiece movement, a resonator mechanism, including a magnetic escapement mechanism including an escape wheel set including a magnetized track, with a succession of areas according to a scrolling period in which its magnetic features are repeated, each area including an increasing magnetic field ramp followed by a magnetic field barrier with an increasing field and of higher field gradient that that of the ramp, the track includes a continuous, closed magnetic layer over the entire periphery of the escape wheel set, of constant thickness and variable width, whose geometry defines these magnetic field ramps and barriers, this escape wheel set cooperating with a sprung balance via a pivoting magnetic stop member comprising a pole piece arranged to cooperate alternately with an internal track and an external track of the magnetic layer.