Time-setting mechanism for clock movement with perpetual julian date
US6295250A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1999 |
| Grant date | Sep 25, 2001 |
| Priority date | — |
| Expiry date | Dec 27, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B19/25
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A time-setting mechanism for a clock movement with perpetual Julian date comprising a device for driving a date indicator including driving means for moving forward said indicator by one jump every twenty-four hours. The movement has an adjusting device for automatically moving said indicator by a number of steps taking into account months with 28, 29 or 30 days, said device comprising a rotary cam driven by at least one step every twenty-four hours, said cam having a profile for steering a sensor bringing about: the oscillating movement of a moving mechanism provided with a pawl system for moving forward the date indicator by the required additional number of adjusting steps; and for moving forward said cam by a number of steps equal to the number of said indicator adjusting steps so as to make it move one complete cycle per year.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.