Battery-containing crown for wristwatches
US4241440A · kind A · utility
0Cited by
1References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 24, 1979 |
| Grant date | Dec 23, 1980 |
| Priority date | — |
| Expiry date | Jan 24, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04C10/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A voltage source is arranged within the stem control crown of a timekeeping watch. The crown is designed similar to a knob shell and forms a component of the electric circuit of the watch. This specific battery arrangement allows an easy exchange of batteries, even by unskilled persons, and makes furthermore feasible, a more compact arrangement and miniaturization of the individual watch components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.