Balance wheel provided with an adjustment device
AssigneeChopard Manufacture SA
InventorKarl-Friedrich Scheufele
Life of this patent
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Abstract
The balance wheel, particularly for a timepiece movement, provided with an adjustment device of its inertia to adjust its frequency of oscillation, comprises a rim (1) of circular shape, free from projecting portions, connected by radial arms (2) to a hub (3). At the intersection of each arm (2) with the rim (1) the latter comprises a recess (4) opening on one of its surfaces, the bottom of this recess (4) comprising a passage (6) opening on the other surface of the rim (1). Balance weights (7) having a general U shape are introduced into these recesses (4) by resilient deformation, these balance weights (7) being held in the desired angular position within corresponding recesses (4) by friction due to the resilience of these balance weights (7) themselves.
Claims7
Balance wheel, particularly for a timepiece movement, provided with an adjustment device for its inertia to adjust the frecuency of oscillation, characterized by the fact that it comprises a rim (1) of circular shape, free from projecting portions, connected by radial arms (2) to a hub (3);
- by the fact that at the intersection of each arm (2) with the rim (1) the latter comprises a recess (4) opening on one of its surfaces, the bottom of this recess (4) comprising a passage (6) opening on the other surface of the rim (1);
- by the fact that balance weights (7) having a general U shape are introduced into these recesses (4) by resilient deformation, these balance weights (7) being held in the desired angular position within corresponding recesses (4) by friction due to the resilience of these balance weights (7) themselves.
Dependencies are inferred from the claim text.