Timepiece balance
AssigneeNivarox-FAR S.A.
InventorsIvan Hernandez, Pierre Cusin
Life of this patent
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Abstract
A balance for a horological movement, including rigid parts constituted by a hub defining the pivot axis of the balance, at least one felloe sector, at least one arm connecting the at least one felloe sector to said hub, and including a slot for receiving and gripping in position an inertia-block, the slot opening into a housing delimited on the one hand by a rigid part of the balance, and on the other hand an elastic arm including a first end integral with a rigid part of the balance, and a second free distal end. The elastic arm can have a body of a non-constant section, a part of the body having a greater thickness than the rest of the elastic arm so as to have a larger volume of material under stress and store a maximum of elastic energy.
Claims17
A balance for a horological movement, comprising:
- rigid parts constituted by a hub defining the pivot axis of said balance, at least one felloe segment, at least one arm connecting said at least one felloe segment to said hub, and including at least one slot for receiving and gripping in position an inertia-block, said at least one slot opening into a housing delimited by a rigid part of said balance and an elastic arm, the elastic arm including a first end integral with a rigid part of said balance and a second distal end which is free relative to said hub, to said arm, and to said felloe segment,
- wherein said elastic arm has a body of a non-constant section, a part of the body having a greater thickness than the rest of the elastic arm so as to have a larger volume of material under stress and store a maximum of elastic energy, and
- wherein said housing is substantially ovoid in shape with an entrance defined by the slot and a bottom, the bottom of the housing having dimensions greater than the entrance of the housing.
Dependencies are inferred from the claim text.