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US 8,240,910 B2Granted
Mechanical oscillator for timepiece
AssigneeComplitime SA
InventorsFranck Orny, Stephen Forsey, Johnny Girardin
Life of this patent
Estimating the term…
Abstract
Mechanical oscillator for a timepiece including a balance (10) and a hairspring (12). The balance (10) and the hairspring (12) are produced from the same material. This material is non-magnetic and has a very low coefficient of thermal expansion.
Claims32
A mechanical oscillator for a timepiece comprising:
- a balance and a hairspring comprising a same first material, said balance comprising a plate with a thickness in a range from 0.05 mm to 0.3 mm., said first material comprising a diamond, quartz or ceramic, one or more of said balance and said hairspring further comprising a coating with nanoparticles of a material having a coefficient of thermal expansion of 20 to 2×10−10/° C.
A mechanical oscillator for a timepiece comprising:
- a balance and a hairspring, wherein the balance comprises:
- a plate comprising a first material, said plate having a thickness comprising a range from 0.05 mm to 0.3 mm,
- an arbor holding said plate, whereby the balance swivels about a swivel axis,
- counterweights mounted on said plate, distributed symmetrically in relation to said swivel axis, said hairspring comprising a second material and said first material and said second material comprising at least one of diamond and quartz, wherein at least one of said balance and said hairspring further comprises a coating with nanoparticles of a material having a coefficient of thermal expansion of 20 to 2×10−10/° C.
1 more element
A method of balancing by removing material from a balance for a mechanical oscillator, the method comprising:
- providing a balance and a hairspring, wherein the balance comprises:
- a plate comprising a first material, said plate having a thickness in a range from 0.05 mm to 0.3 mm,
- an arbor holding said plate, whereby the balance swivels about a swivel axis,
- counterweights mounted on said plate, distributed symmetrically in relation to said swivel axis, said hairspring comprising a second material and said first material and said second material comprising at least one of diamond and quartz, one or more of said balance and said hairspring comprising a coating of nanoparticles material having a coefficient of thermal expansion of 20 to 2×10−10/° C., wherein at least one part of said counterweights has a cylindrical shape in relation to an axis of symmetry in the part of one of said counterweights that is fitted into said plate, said counterweights having a symmetrical structure in relation to the axis of symmetry;
- removing material from at least one of said symmetrical counterweights symmetrically in relation to the axis of symmetry.
2 more elements
A method of balancing by adding material to a balance for a mechanical oscillator, the method comprising:
- providing a balance and a hairspring, wherein the balance comprises:
- a plate comprising a first material, said plate having a thickness in a range from 0.05 mm to 0.3 mm,
- an arbor holding said plate, whereby the balance swivels about a swivel axis,
- counterweights mounted on said plate, distributed symmetrically in relation to said swivel axis, said hairspring comprising a second material and said first material and said second material comprising diamond and quartz, at least one of said balance and said hairspring comprising a coating of nanoparticles material having a coefficient of thermal expansion of 20 to 2×10−10/° C., wherein at least one part of said counterweights has a cylindrical shape in relation to an axis of symmetry in the part of one of said counterweights that is fitted into said plate, said counterweights having a symmetrical structure in relation to the axis of symmetry;
- adding material to at least one of said symmetrical counterweights symmetrically in relation to the axis of symmetry.
2 more elements
Dependencies are inferred from the claim text.