Timepiece movement of reduced height with a large power reserve
US8891339B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2012 |
| Grant date | Nov 18, 2014 |
| Priority date | — |
| Expiry date | Nov 9, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B33/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Timepiece gear train device (1) of reduced height with a large power reserve, driving display means (4) including a cannon-pinion (5) and an hour wheel (6), which are driven about a main pivot axis (AP), secant to a barrel (3), by a motion work (7) and including a driving wheel (8), which pivots about a secondary pivot axis (AS) external to said barrel (3) and is friction coupled to said motion work (7) on a friction surface (9) coaxial to said secondary pivot axis (AS).Said driving wheel (8) includes a driving cannon pinion (83) pivoting about a wheel body (80) along said secondary pivot axis (AS) and coupled by a friction spring (84) to a shoulder (85) of said wheel body (80) forming said friction surface (9), said driving cannon-pinion (83) cooperating with a minute wheel (14) pivoting about a minute axis (AM).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.