Timepiece transmission device
AssigneeRolex SA
InventorsJean-Louis Bertrand, Pascal Billet, Pierre-Alain Graemiger, Félix Grasser
Life of this patent
Estimating the term…
Abstract
A timepiece transmission device (100), particularly for a timepiece mechanism (110) and specifically for an automaton chain (5) of a timepiece movement (120), includes: a first device (1), particularly a first freewheel device (1), for unidirectionally connecting a first portion (1a) to a second portion (1b); and a brake (2) arranged so as to brake, particularly by friction, the first portion in relation to the second portion.
Claims23
A timepiece transmission device comprising:
- a first one-way connection device providing connection between a first part and a second part, wherein the first one-way connection device blocks a relative movement of the first part relative to the second part in a first direction, and
- a brake designed to brake the first part relative to the second part in a relative movement of the first part in a second direction opposed to the first direction,
- wherein the brake applies a continuous braking torque resisting the movement of the first part relative to the second part in the second direction,
- wherein the brake has no braking effect on the first and second parts in a movement of the first and second parts in the first direction.
A self-winding mechanism for a timepiece movement comprising an oscillating mass, a barrel and an automatic winding chain,
- wherein the automatic winding chain comprises a transmission device comprising:
- a first one-way connection device providing connection between a first part and a second part, wherein the first one-way connection device blocks a relative movement of the first part relative to the second part in a winding direction, and
- a brake designed to brake the first part relative to the second part in a relative movement of the first part in a non-winding direction opposed to the winding direction,
- wherein a braking torque of the brake in the non-winding direction is greater than 20% of a maximum static torque exerted by the oscillating mass in the non-winding direction,
- wherein the brake has no braking effect on the first and second parts in a movement of the first and second parts in the winding direction.
Dependencies are inferred from the claim text.