Timepiece calendar indexing apparatus
US4059953A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1976 |
| Grant date | Nov 29, 1977 |
| Priority date | — |
| Expiry date | Jun 18, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B19/25366
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An indexing apparatus for changing automatically and rapidly calendar information of a clock includes an indexing assembly having both day and date means, each engageable with for driving respective day and date discs provided with calendar indicia. A cam driven by the drive train of the clock mechanism rotates through a full revolution each 12-hour period. A member including a plurality of gear teeth arranged in a sector is mounted for pivota movement against the bias of a spring which positions the member in the path of movement of the cam. The indexing assembly, further, includes an element formed by a disc and a sector gear which is driven in opposite directions by the member whose gear teeth are in driving engagement therewith. The disc of the element includes a pair of substantially diametrically oppositely disposed notches having oppositely inclined ramps between the upper and lower surfaces of the clutch disc. The components of the indexing assembly are mounted in a stack with the day means between the date means and the element. The day means includes a pair of follower projections which normally are disposed within the notches, the day means being movable with the element…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.