Wear and shock resistant escapement lever for a timepiece movement
AssigneeETA SA Manufacture Horlogere Suisse
InventorsDavid Richard, Andrés Cabezas Jurin
Life of this patent
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Abstract
The invention concerns a escapement lever (1) for the escapement mechanism of a timepiece movement, including at least one fork delimiting a notch (2) which includes horns (3; 4) arranged for cooperating with a balance. Said fork notch (2) includes, in at least one said horn (3; 4), a slot (5, 6) and/or a chamber (30), wherein said slot (5; 6) and/or chamber (30) is arranged to confer elasticity on the corresponding horn, which softens the shock at each impulse, by absorbing part of the impact energy, and then returning it subsequent to said impact.
Claims23
A set for an escapement mechanism of a timepiece movement, comprising:
- a balance including an impulse pin of a balance roller;
- and
- an escapement lever including at least one fork having horns delimiting a fork notch, said horns being arranged to cooperate with said impulse pin of said balance, and at least one of said horns has a slot or a chamber to delimit at least one elastic lip extending between a contact surface and said slot or said chamber,
- wherein said slot or said chamber is arranged to confer elasticity on a corresponding horn of said at least one of said horns to soften shock during each impulse from said impulse pin by absorbing part of an impact energy and then returning said energy subsequent to said impulse.
Dependencies are inferred from the claim text.