Alarm setting device for timepieces
US4069658A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1976 |
| Grant date | Jan 24, 1978 |
| Priority date | — |
| Expiry date | Dec 20, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04C21/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An alarm setting device for timepieces consisting of a primary alarm setting wheel which engages an alarm hand wheel, a primary time wheel which is provided on the same shaft as the primary alarm setting wheel and which is driven by a wheel train of the timepiece, a primary cam mechanism which includes projections and engaging slots provided on the primary time wheel and in the primary alarm setting wheel, a secondary alarm setting wheel which engages with the primary alarm setting wheel, a secondary time wheel which is provided on the same shaft as the secondary alarm setting wheel and which is driven at a higher rate than that of the primary time wheel by a wheel train of the timepiece, a secondary cam mechanism which includes projections and engaging slots provided on the secondary time wheel and in the secondary alarm setting wheel and whose dropping and riding-up actions follow those of the primary cam mechanism, and a contact device which contains a movable part which is engaged by the primary and secondary time wheels and activated by the primary and secondary cam mechanisms and in which the on-off condition of the contact device is controlled by the movable part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.