Annual calendar for mechanical watches
US10317844B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 4, 2016 |
| Grant date | Jun 11, 2019 |
| Priority date | — |
| Expiry date | May 4, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B19/2536
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A date display device with an annual calendar function comprises the following elements: a drive wheel (8) which is coupled to a mechanical movement, a driving device which is driven by the drive wheel (8), a date wheel (4) which periodically interacts with the driving device and is driven by this and a month wheel (5) which is periodically interacts with the date wheel, as well as a month cam disc (6) which is connected to the month wheel. The driving device comprises a driver (8.1) and a rotation axis (8.3), wherein the driver moves on a path about the rotation axis (8.3) of the driving device and the rotation axis adopts at least two different positions relative to the date wheel (4), wherein in a first position, the driving device advances the date wheel by a single unit and in a second position by a plurality of units and wherein the adopted position depends on the number of days of the month concerned.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.