Combined crown/pushbutton for illuminated analog watch
US5644553A · kind A · utility
9Cited by
10References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 13, 1995 |
| Grant date | Jul 1, 1997 |
| Priority date | — |
| Expiry date | Feb 13, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04C3/008
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A combination crown and pushbutton for an illuminated analog watch having a manual actuator on the setting stem external to the watchcase for pulling out the stem and manually rotating it to set the hands. The watch has an electroluminescent dial which lights up when a switch is closed. An axially elongated detent recess in the stem allows the stem to move inward when the actuator is pushed. A spring switching arm maintains the actuator in the normal run position and closes a switch when the actuator is pushed. Thus a separate pushbutton is not needed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.