Calendar watch provided with locking means
US7408844B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2006 |
| Grant date | Aug 5, 2008 |
| Priority date | — |
| Expiry date | Dec 22, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B19/25373
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A calendar watch is arranged to allow time-setting to be carried out without this operation altering the state of the calendar mechanism at the passage to midnight. This mechanism, which is of the instantaneous date type, includes a large lever (2) loaded by a spring and wound by a spiral shaped cam (11) and a click (20) released at midnight by a flexible finger (12) of a 24-hour wheel (10). The mechanism prevents any transmission of movement from the 24 hour wheel to the date wheel set, when they are set in the active position by the winding stem (33) pulled out into the time-setting position of the watch. A pivoting isolator (30), which, in its active position, abuts against the click (20) prevents the click from releasing the lever (2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.