Timepiece date mechanism
US6738316B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2002 |
| Grant date | May 18, 2004 |
| Priority date | — |
| Expiry date | Nov 15, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B19/2536
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This date mechanism comprises a units runner (1, 3) equipped with ten teeth or with a multiple of ten teeth and a tens runner (2, 4) equipped with four teeth or with a multiple of four teeth, a transmission connecting these runners to move the tens runner on by one step for every ten steps of the units runner (1, 3) and a drive runner (7, 8) for driving the units runner (1, 3). One tooth of the units runner (1, 3) for moving on from “1” to “2” is a tooth of an auxiliary runner (12) secured to the units runner (1, 3) and which is able to engage alternately with the teeth of the tens indicator runner (2, 4) and with a cam (15) secured to the tens runner (2, 4) and intended to allow the auxiliary runner (12) to drive said tens runner (4) by one step between “31” and “01” without driving the units runner (1, 3).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.