Patent US3782209A successfully refreshed from Google Patents.
US3782209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical resonator of rotation
Assignee: Movado Watch Co SA
•
Filing: 1972-03-14
•
Granted: 1974-01-01
•
Expires: 1992-03-14
Abstract
Abstract A mechanical resonator of rotation, particularly for use in a timepiece, comprising an oscillatory mass having an axis of symmetry, a support, spring means connecting said mass to said support for oscillation of the latter about a rotational axis substantially coinciding with said axis of symmetry, said spring means including leaf springs consisting of rectilinear active sections interconnected by connecting elements adapted to be very rigid with respect to the effective stresses of oscillation and determining the useful length of said active sections; preferably, said springs are obtained by suitably folding single cut out pieces.
Inventors
- 👤 R Favre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:37
CPC Classifications
G; G04; G04B; G04B17/00; G04B17/04; G04B17/045; G04C; G04C3/00; G04C3/08; G04C3/10; G04C3/101; G04C3/102; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1526; Y10T74/1553; Y10T74/1555
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
135 words
An elastic structure for use in a mechanical resonator of rotation between the angularly displaceable mass of said resonator and a stationary point radially inward of said mass comprising: a flat leaf spring having a width substantially exceeding its thickness and consisting of retilinear active sections interconnected by planar connecting sections extending the distance between said active sections and disposed in a plane substantially at a right angle with respect to the planes of said active sections, said connecting sections being relatively very rigid with respect to the effective stresses of oscillation and determining the functional length of the active sections, whereby only the active sections of said determined functional length substantially participate in the process of elastic deformation of oscillation, said active sections being oscillatable in a direction generally perpendicular to the planes thereof.
Claim 2
Dependent Claim
135 words
An elastic structure for use in a mechanical resonator of rotation between the angularly displaceable mass of said resonator and a stationary point radially inward of said mass comprising: a flat leaf spring having a width substantially exceeding its thickness and consisting of retilinear active sections interconnected by planar connecting sections extending the distance between said active sections and disposed in a plane substantially at a right angle with respect to the planes of said active sections, said connecting sections being relatively very rigid with respect to the effective stresses of oscillation and determining the functional length of the active sections, whereby only the active sections of said determined functional length substantially participate in the process of elastic deformation of oscillation, said active sections being oscillatable in a direction generally perpendicular to the planes thereof.
Claim 3
Dependent Claim
20 words
A structure according to claim 1, characterized in that each of the said springs is a unitary cut out piece.
Claim 4
Dependent Claim
47 words
A structure according to claim 2, characterized in that the intermediary connecting sections are inclined with respect to the plane of oscillation, so as to oppose a great resistance both to the useful stresses of oscillation and to the parasitic stresses perpendicular to the plane of oscillation.
Claim 5
Dependent Claim
24 words
A structure according to claim 3, characterized in that the intermediary connecting sections are inclined at 45* with respect to the plane of oscillation.
Claim 6
Dependent Claim
33 words
A structure according to claim 2, characterized in that the intermediary connecting sections are situated in the plane of oscillation, so as to oppose a maximum resistance to the useful stresses of oscillation.
Claim 7
Dependent Claim
44 words
A structure according to claim 2, characterized in that the connecting sections situated at each end of the spring lie in a plane parallel to the plane of oscillation, so as to render possible a flat welding, without any static constraint of the spring.
References Cited (Backward Citations)
US3170278A
Cited
US3167905A
Cited
GB1067148A
Cited
US3316708A
Cited
FR1510547A
Cited
GB1108028A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |